Jaan Pelt

https://www.etis.ee/CV/Jaan_Pelt/est
15.03.1947
737 4516
53416372
jaan.pelt@ut.ee

Teenistuskäik

Töökohad ja ametid
01.01.2018–31.12.2019   
Tartu Ülikool, Loodus- ja täppisteaduste valdkond, Tartu observatoorium, vanemteadur (0,80)
01.01.1993–...   
Tartu Observatoorium, vanemteadur
01.01.2017–31.12.2017   
Tartu Observatoorium, Vanemteadur (0,80)
2012–31.12.2017   
Tartu Observatoorium, Juhtivteadur (1,00)
1995–2012   
Tartu Observatoorium, Vanemteadur (1,00)
01.01.1982–31.12.1992   
Astrofüüsika ja Atmosfäärifüüsika Instituut, vanemteadur
01.01.1974–31.12.1982   
Astrofüüsika ja Atmosfäärifüüsika Instituut, nooremteadur
 
 
Haridustee
Tartu Riiklik Ülikool, rakendusmaatemaatika eriala, 1974
 
 
Teadusorganisatsiooniline ja -administratiivne tegevus
2012−...   
Aalto Ülikoolis, Informatsiooni ja arvutiteaduse osakonnas, regulaarsed visiidid, osavõtt tippkeskuse ReSoLVE tööst (resource person)
2007−...   
Nimetatud Helsingi Ülikooli astronoomia dotsendiks, Soome Vabariik
1981 - visiteeriv astronoom Konkoly Observatooriumis Ungaris (3 kuud)
1990-1996 Astrofüüsika Laboratooriumis Helsingis, Soome Vabariik (kokku 12 kuud)
1996-2004 Oulu Ülikoolis, Soome Vabariik (kokku 13 kuud)
1992-1995 Hamburgi Observatooriumis, Saksamaal (kokku 6 kuud)
1997 NORDITA-s Taanimaal (1 kuu)
1997-1998 Arendatud Uuringute Keskus, Oslo, Norra Kuningriik (kokku 8 kuud)
1999-2002 Oslo Ülikoolis, Norra Kuningriik (4 kuud)

Kvalifikatsioon

Teaduskraadid
Jaan Pelt, doktorikraad, 1981, (juh) Tõnu Kipper, Частотный анализ астрономических временных рядов (Astronoomiliste aegridade sagedusanalüüs), Astrofüüsika ja Atmosfäärifüüsika Instituut.
 
 

Jooksvad projektid

Lõppenud projektid

Juhendatud väitekirjad

Publikatsioonid

Klass
Aasta
Publikatsioon
 
1.1.
2018
Olspert, N.; Pelt, J.; Käpylä, M.J.; Lehtinen, J (2018). Estimating activity cycles with probabilistic methods I. Bayesian generalised Lomb-Scargle periodogram with trend. Astronomy & Astrophysics, 615 (A111), 1−12.10.1051/0004-6361/201732524.
1.1.
2018
Olspert, N.; Lehtinen, J.; Käpylä, M. J.; Pelt, J.; Grigorievskiy, A. (2018). Estimating activity cycles with probabilistic methods II. The Mount Wilson Ca H&K data. Astronomy & Astrophysics, 619 (A6), 1−20.10.1051/0004-6361/201732525.
6.3.
2018
Pelt, Jaan (2018). Südametuksetähed. Sirp (27−29).31.08.2018 SA Kultuurileht.
1.1.
2017
Peets, P.; Leito, I.; Pelt, J.; Vahur, S. (2017). Identification and classification of textile fibres using ATR-FT-IR spectroscopy with chemometric methods. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 173, 175−181.10.1016/j.saa.2016.09.007.
1.1.
2017
Pelt, Jaan; Käpylä, Maarit; Nigul Olspert (2017). Method of frequency dependent correlations: investigating the variability of total solar irradiance. Astronomy & Astrophysics, 600 (A9), 1−19.10.1051/0004-6361/201527816.
1.1.
2017
Hirv, A.; Pelt, J.; Saar, E.; Tago, E.; Tamm, A.; Tempel, E.; Einasto, M. (2017). Alignment of galaxies relative to their local environment in SDSS-DR8. Astronomy & Astrophysics, 599, A31−15.10.1051/0004-6361/201629248.
5.2.
2017
Olspert, N; Käpylä, M.J., Pelt, J (2017). From periods to cycles: new methods applied to solar, stellar and “in silico” data. 1−1.
6.3.
2017
Pelt, Jaan (2017). Ameerika varjutus. Sirp (33−35).09.06.2017 SA Kultuurileht.
6.3.
2017
Jaan, Pelt (2017). Kuidas jõudis kuld sõrmusesse. Horisont, 5, 12−18.
1.1.
2016
Käpylä, M.J.; Käpylä, P.J; Olspert, N.; Brandenburg, A.; Warnecke, J.; Karak, B.B.; Pelt, J. (2016). Multiple dynamo modes as a mechanism for long-term solar activity variations. Astronomy & Astrophysics, 589 (A56), 1−24.10.1051/0004-6361/201527002.
3.1.
2016
Olspert, Nigul; Käpylä, Maarit; Jaan Pelt (2016). Method for estimating cycle lengths from multidimensional time series: Test cases and application to a massive "in silico" dataset. Proceedings: 2016 IEEE International Conference on Big Data (Big Data), December 5 - December 8, 2016, Washington DC , USA. IEEE, 3214−3223.BigData.2016.7840977.
5.2.
2016
Kilpua, E.; Olspert, N.; Grigorievskiy, A.; Käpylä, M.; Tanskanen, E.; Kataoka, R.; Miyahara, H.; Pelt, J.; Ying, L. (2016). Statistical study of strong and extreme geomagnetic disturbances and solar cycle characteristics. Geophysical Research Abstracts, 18, EGU2016-3407.
6.3.
2016
Pelt, J (2016). Astronoomid ja aeg. Sirp (12−13). SA Kultuurileht.
6.3.
2016
Pelt, J (2016). Väikesed varjutajad, mõned neist varastatud. Sirp (27−29). SA Kultuurileht.
1.1.
2015
Kilpua, E.K.J.; Olspert, N.; Grigorievskiy, A.; Käpylä, M.J.; Tanskanen, E.I.; Miyahara, H.; Kataoka, R.; Pelt, J.; Liu, Y.D. (2015). Statistical study of strong and extreme geomagnetic disturbances and solar cycle characteristics. The Astrophysical Journal, 806 (2, 272), 1−7.
1.1.
2015
Karak, B.B.; Kapyla, P.J.; Kapyla, M.J.; Brandenburg, A.; Olspert, N.; Pelt, J. (2015). Magnetically controlled stellar differential rotation near the transition from solar to anti-solar profiles. Astronomy & Astrophysics, 576, 1−17.10.1051/0004-6361/201424521.
1.1.
2015
Olspert, N.; Käpylä, M.J.; Pelt, J.; Cole, E.M; Hackman, T.; Lehtinen, J.; Henry, G.W. (2015). Multiperiodicity, modulations and flip-flops in variable star light curves III. Carrier fit analysis of LQ Hya photometry for 1982-2014. Astronomy & Astrophysics, 577, 1−13.
6.3.
2015
Pelt, Jaan (2015). Maakera saab nägijaks. Tartu Tähetorni Kalender, 92, 49−62.
1.1.
2014
Tempel, E.; Kipper, R.; Saar, E.; Bussov, M.; Hektor, A.; Pelt, J. (2014). Galaxy filaments as pearl necklaces. Astronomy & Astrophysics, 572, A8.dx.doi.org/10.1051/0004-6361/201424418.
1.1.
2013
Hackman, T.; Pelt, J.; Mantere, M.J.; Jetsu, L.; Korhonen, H.; Granzer, T.; Kajatkari, P.; Lehtinen, J.; Strassmeier, K.G (2013). Flip-flops of FK Comae Berenices. Astronomy & Astrophysics, 553, 1−13.
1.1.
2013
Lindborg, M.; Mantere, M.J.; Olspert, N.; Pelt, J.; Hackman, T.; Henry, G.W.; Jetsu, L.; Strassmeier, K.G. (2013). Multiperiodicity, modulations and flip-flops in variable star light curves II. Analysis of II Pegasus photometry during 1979–2010. Astronomy & Astrophysics, 559, 1−10.
3.1.
2013
Mantere, M.J; Käpylä, P.; Pelt, J. (2013). Role of longitudinal activity complexes for solar and stellar dynamos. In: A.G. Kosovichev, E.M. de Gouveia Dal Pino & Y. Yan (_EditorsAbbr). Solar and Astrophysical Dynamos and Magnetic Activity (IAU S294) (175−186).. Cambridge University Press. (Proceedings of the International Astronomical Union; 8).
6.3.
2013
Pelt, Jaan (2013). Untsu läinud tähed. Tartu Tähetorni Kalender, 90, 86−91.
1.3.
2012
Pelt, Jaan; Kärner, Olavi (2012). On the variability of total solar irradiance. Space Research Review, 1: Baltic Applied Astroinformatics and Space data Processing, Ventspils, 7-8 May 2012. Engineering Research Institute "Ventspils International Radio Astronomy Centre" of Ventspils Univers, 183−195.
5.2.
2012
Hackman, T.; Pelt, J; Mantere, M.J.; Jetsu, L; Ilyin, I.; Kochukov, O.; Korhonen, H.; Lehtinen, J.; Lindborg, M; Piskunov, N. (2012). Flip-flops and dynamo waves in late-type stars. 1−1.
1.1.
2011
Pelt, J.; Olspert, N.; Mantere, M.J.; Tuominen, I. (2011). Multiperiodicity, modulations and flip-flops in variable star light curves I. Carrier fit method. Astronomy & Astrophysics, 535, 1−12.
1.1.
2011
Hirv, A.; Olspert, N.; Pelt, J. (2011). Towards the Automatic Estimation of Gravitational Lense's Time Delays. Baltic Astronomy, 20, 125−144.
1.1.
2010
Pelt, J.; Korpi, M.J.; Tuominen, I. (2010). Solar active regions: a nonparametric statistical analysis. Astronomy & Astrophysics, 513, 1−7.
6.3.
2010
Pelt, Jaan (2010). Muutuv Päike, muutuvad tähed ja meie. Tartu Tähetorni Kalender, 86, 88−92.
1.1.
2009
Pelt, Jaan (2009). High frequency limits in periodicity search from irregularly spaced data. Baltic Astronomy, 18, 83−92.
6.3.
2009
Pelt, Jaan (2009). Mis toimub Päikese sees? Kuidas me seda teame. Horisont, 1, 10−15.
6.2.
2008
Pelt, Jaan (2008). Irregularly spaced data analysis in astronomy and related sciences. Lecture notes and illustrations. 1−873.
6.3.
2008
Pelt, Jaan (2008). Gravitatsioonilääts teeb nähtamatu nähtavaks. Horisont, 1, 10−17.
1.1.
2007
Tuominen, Ilkka; Pelt, Jaan; Brooke, John; Korpi, Maarit. (2007). Does the Sun have a face? Astronomische Nachrichten, 328 (10), 1020−1022.
1.1.
2007
Hirv, Anti; Eenmäe, Tõnis; Liivamägi, Juhan; Pelt, Jaan (2007). Estimation of Time Delays from Two Blended Light Curves of Gravitational Lenses. Baltic Astronomy, 16, 241−250.
1.1.
2007
Hirv, A.; Eenmäe, T.; Liimets, T; Liivamägi, L.J.; Pelt, J. (2007). Estimation of time delays from unresolved photometry. Astronomy & Astrophysics, 464, 471−478.
6.3.
2007
Pelt, Jaan (2007). Katsume harjuda. Indrek Rohtmets, Toomas Kukk (_EditorsAbbr). Lehed ja tähed (64−71).. MTÜ Loodusajakiri.
6.3.
2007
Pelt, Jaan (2007). Tume aine – vaade tagasi. Horisont, 2, 50−51.
1.1.
2006
Pelt, J.; Brooke, J.M.; Korpi, M.J.; Tuominen, I. (2006). Kinematic frames and ``active longitudes'': does the Sun have a face? Astronomy & Astrophysics, 460, 875−885.
1.1.
2006
Hirv, A., Annuk, K., Eenmäe, T., Liimets, T., Pelt, J., Puss, A., Tempel, M. (2006). Orbital elements and mass-loss rate of V444 Cyg. Baltic Astronomy, 15 (3), 405−412.
6.3.
2006
Pelt, Jaan (2006). Kas Päikesel on nägu? Tartu Tähetorni Kalender, 82, 79−85.
6.7.
2006
Korpi, M. J.; Pelt, J.; Brooke, J. M.; Tuominen, I. (2006). On the nonaxisymmetricity of the sunspot distribution: kinematic frame constructions and their implications (Poster). In: (1−1).Solar and Stellar Activity Cycles, 26th meeting of the IAU, Joint Discussion 8, 17-18 August 2006, Prague, Czech Republic. IAU. (JD08).
1.1.
2005
Pelt, J.; Tuominen, I.; Brooke, J. (2005). Century-scale persistence in longitude distribution in the Sun and in silico. Astronomy & Astrophysics, 429, 1093−1096.
1.1.
2005
Tõnsuaadu, K.; Pelt, J.; Borissova, M. (2005). Monitoring of the evolved gases in apatite-ammonium sulfate thermal reactions. Journal of Thermal Analysis and Calorimetry, 80 (3), 655−658.
3.2.
2005
Pelt, J. (2005). Estimation of time delays from unresolved photometry. 5−15.
6.3.
2005
Pelt, Jaan (2005). Kuidas ma arvutasin maailma vanust. Tartu Tähetorni Kalender, 81, 64−70.
6.7.
2005
Masing, Uku; Masing, Uku; Masing, Eha; Runnel, Hando; Kasemaa, Kalle; Tihemets, Evi; Leetaru, Ilse; Pelt, Jaan (2005). Luule VI. Tartu: Ilmamaa.
1.1.
2004
Tõnsuaadu, Kaia; Borissova, Maria; Bender, Villem; Pelt, Jaan (2004). Thermal Reactions in Synthetic Apatite – Ammonium Sulfate Mixture, Phosphorus, Sulfur, and Silicon and Related Elements. Phosphorus Sulfur and Silicon and the Related Elements, 179 (11), 2395−2407.
1.1.
2004
Kaljuvee, T.; Pelt, J.; Radin, M. (2004). TG-FTIR study of gaseous compounds evolved at thermooxidation of oil shale. Journal of Thermal Analysis and Calorimetry, 78 (2), 399−414.
5.1.
2004
Tõnsuaadu, K.; Pelt, J.; Borissova, M. (2004). Monitoring of the Evolved Gases by FTIR Spectroscopy in Apatite - Ammonium Sulfate Thermal Reactions. 13th International Congress on Thermal Analysis and Calorimetry, Book of Abstracts, Chia Laguna, September 12-19. 357−357.
6.7.
2004
Olspert, Nigul (2004). Mikrolääts-efekti hindamine kaksik-kvasari heleduskõverate põhjal. (Magistritöö, Tartu Ülikool). University of Tartu.
6.2.
2003
Pelt, J. (2003). Astronomical Time Series Analysis. 1−163.
1.1.
2002
Pelt, J.; Refsdal, S.; Stabell, R. (2002). Bias and Consistency in Time Delay Estimation Methods: Case of the Double Quasar He 1104-1805. Astronomy & Astrophysics, 389, L57−L60.
1.1.
2002
Hjorth, J.; Burud, I.; Jaunsen, A. O.; Schechter, P. L.; Kneib, J. P.; Andersen, M. I.; Korhonen, H.; Clasen, J. W.; Kaas, A. A.; Ostensen, R.; Pelt, J.; Pijpers, F. P. (2002). The Time Delay of the Quadruple Quasar Rx J0911.4+0551. Astrophysical Journal, 572, L11−L14.
1.1.
2002
Brooke, J. M.; Pelt, J.; Pulkkinen, P.; Tuominen, I. (2002). The Importance of Spatial Information in Sunspot Records. H. Rickman. Highlights of Astronomy (334−337).. Astronomical Society of Pacific.
1.1.
2002
Berdyugina, S. V.; Pelt, J.; Tuominen, I. (2002). Magnetic Activity in the Young Solar Analog Lq Hydrae - I. Active Longitudes and Cycles. Astronomy & Astrophysics, 394, 505−515.
3.2.
2002
Pelt, J. (2002). Dispersion spectra - from time delays to frequency analysis. In: Actes des XXXIVes Journees de Statistique (121−122).XXXIVes Journees de Statistique, Bruxelles et Louvain-la-Neuve, 13-17 mai 2002. N/A.
3.4.
2002
Tõnnisson, T; Pelt, J; Vince, B (2002). Portable optical spectrum analyzer for testing optical DWDM telecommunication systems. 341−342.
3.4.
2002
Tõnnisson, T.; Pelt, J.; Vince, B. (2002). Portable optical spectrum analyzer for testing optical DWDM telecommunication systems. Proceedings of the 8th Biennial Baltic Electronics Conference, Tallinn Technical University, October 6-9. Tallinn Technical University, 341−342.
1.1.
2001
Petrov, P. P.; Pelt, J.; Tuominen, I. (2001). Periodic Variations in the Colours of the Classical T Tauri Star Rw Aur a. Astronomy & Astrophysics, 375, 977−981.
3.1.
2001
Brooke, J. M.; Pelt, J.; Pulkkinen, P.; Tuominen, I. (2001). Symmetries of the solar dynamo: comparing theory with observation. Dynamo and Dynamics, a Mathematical challenge (331−338).. Kluwer : Kluwer Academic Publishers.
3.4.
2001
Refsdal, S.; Stabell, R.; Pelt, J.; Schild, R. (2001). Constraints on source and lens parameters from microlensing variability in QSO 0957+561 A,B, Gravitational Lensing. Recent Progress and Future Goals, ASP Conference Proceedings Series, CS-237. 197−197.
1.1.
2000
You, J.; Pelt, J.; Tuominen, I. (2000). Period Analysis for Simultaneous Multichannel Photometric Observations. Astronomy and Astrophysics Supplement Series, 146, 397−406.
1.1.
2000
Refsdal, S.; Stabell, R.; Pelt, J.; Schild, R. (2000). Constraints on Source and Lens Parameters From Microlensing Variability in Qso 0957+561 a,B. Astronomy & Astrophysics, 360, 10−14.
1.1.
2000
Pelt, J.; Brooke, J.; Pulkkinen, P. J.; Tuominen, I. (2000). A New Interpretation of the Solar Magnetic Cycle. Astronomy & Astrophysics, 362, 1143−1150.
1.1.
2000
Jetsu, L.; Pelt, J. (2000). Spurious Periods in the Terrestrial Impact Crater Record. Astronomy & Astrophysics, 353, 409−418.
1.1.
2000
Burud, I.; Hjorth, J.; Jaunsen, A. O.; Andersen, M. I.; Korhonen, H.; Clasen, J. W.; Pelt, J.; Pijpers, F. P.; Magain, P.; Ostensen, R. (2000). An Optical Time Delay Estimate for the Double Gravitational Lens System B1600+434. Astrophysical Journal, 544, 117−122.
1.1.
1999
Pulkkinen, P. J.; Brooke, J.; Pelt, J.; Tuominen, I. (1999). Long-Term Variation of Sunspot Latitudes. Astronomy & Astrophysics, 341, L43−L46.
1.1.
1999
Jetsu, L.; Pelt, J.; Tuominen, I. (1999). Time Series Analysis of V 1794 Cygni Long-Term Photometry. Astronomy & Astrophysics, 351, 212−224.
1.1.
1999
Jetsu, L.; Pelt, J. (1999). Three Stage Period Analysis and Complementary Methods. Astronomy and Astrophysics Supplement Series, 139, 629−643.
1.1.
1998
Pelt, J.; Schild, R.; Refsdal, S.; Stabell, R. (1998). Microlensing on Different Timescales in the Lightcurves of Qso 0957+561 a,B. Astronomy & Astrophysics, 336, 829−839.
1.1.
1998
Pelt, J.; Hjorth, J.; Refsdal, S.; Schild, R.; Stabell, R. (1998). Estimation of Multiple Time Delays in Complex Gravitational Lens Systems. Astronomy & Astrophysics, 337, 681−684.
1.1.
1998
Brooke, J. M.; Pelt, J.; Tavakol, R.; Tworkowski, A. (1998). Grand Minima and Equatorial Symmetry Breaking in Axisymmetric Dynamo Models. Astronomy & Astrophysics, 332, 339−352.
1.1.
1997
Jetsu, L.; Pohjolainen, S.; Pelt, J.; Tuominen, I. (1997). Is the Longitudinal Distribution of Solar Flares Nonuniform? Astronomy & Astrophysics, 318, 293−307.
1.1.
1997
Duemmler, R.; Pelt, J.; Korhonen, H.; Iliev, I. (1997). Is Beta Crateris a Sirius-Like System? Astronomy & Astrophysics, 328, L37−L39.
3.1.
1997
Pelt, J. (1997). Nonparametric methods for shift and periodicity detection in irregularly measured data. eds. T. Subba Rao and M.B. Priestley. Time Series Analysis in Astronomy and Meteorology (249−263).. Chapman & Hall.
3.1.
1997
Pelt, J. (1997). Fast computation of trigonometric sums with applications to frequency analysis of astronomical data, in Astronomical Time Series. Proceedings of the the Florence and Georg Wise Observatory 25th Anniversary Symposium, held in Tel-Aviv, Isreal, 30 December 1996- 1 January 1997. Dordrecht: Kluwer Academic Publishers, 179−182.
1.1.
1996
Pelt, J.; Kayser, R.; Refsda, S.; Schramm, T. (1996). The light curve and time delay of QSO 0957+561. Astronomy & Astrophysics, 305, 97−106.
1.1.
1996
Jetsu, L.; Pelt, J. (1996). Searching for periodicity in weighted time point series. Astronomy and Astrophysics Supplement Series, 118, 587−594.
3.4.
1996
Jetsu, L.; Pohjolainen, S.; Pelt, J.; Tuominen, I. (1996). Longitudinal distribution of major solar flares. Stellar Systems and the Sun, 109. 135−136. ( ASP Conf. Series).
3.4.
1996
Pelt, J.; Kayser, R.; Schild, R.; Thomson, D.J. (1996). The time delay between QSO 0957+561 A,B. Examing the Big Bang and Diffuse Background Radiations, IAU Symposium 168, Hague August 23-27. 539−540.
1.1.
1994
Pelt, J.; Hoff, W.; Kayser, R.; Refsdal, S.; Schramm, T. (1994). Time delay controversy on QSO 0957+561 A,B not yet decided. Astronomy & Astrophysics, 286, 775−785.
1.1.
1993
Schramm, K.-J.; Borgeest, U.; Camenzind, M.; Wagner, S. J.; Bade, N.; Dreissigacker, O.; Heidt, J.; Hoff, W.; Kayser, R.; Kuhl, D.; von Linde, J.; Linnert, M. D.; Pelt, J.; Schramm, T.; Sillanpaa, A.; Takalo, L. O.; Valtaoja, E.; Vigotti, M. (1993). Recent activity in the optical and radio lightcurves of the blazar 3C 345: indications for a 'lighthouse effect' due to jet rotation. Astronomy & Astrophysics, 278, 391−405.
1.1.
1993
Jetsu, L.;Pelt, J.;Tuominen, I. (1993). Spot and flare activity of FK Comae Berenices: long term photometry. Astronomy & Astrophysics, 278, 449−462.
3.1.
1993
Jetsu, L.; Tuominen, I.; Pelt, J. (1993). Time series analysis of FK Comae and LQ. T. Subba Rao, M.B. Priestley, O. Lessi. Aplications of Time Series Analysis in Astronomy and Meteorology (199−202).. Chapman & Hall.
3.1.
1993
Pelt, J. (1993). Nonparametric methods for shift and periodicity detection in irregularly measured data. T. Subba Rao, M.B. Priestley, O. Lessi. Aplications of Time Series Analysis in Astronomy and Meteorology (149−157).. Chapman & Hall.
3.4.
1993
Pelt, J. (1993). Multistage search for hidden patterns in irregularly observed time series. 5th ESO /ST-ECF Data Analysis Workshop, Garching, 26-27 April. 179−184.
3.4.
1993
Schramm, T.; Pelt, J. (1993). The sampling problem. Proceedings of the 1st MEGAPHOT Workshop, held in Hamburg, 1993 March 30/31. 48−57.
1.1.
1992
Malyuto, V.; Pelt, J.; Shvelidze, T. (1992). The spectrophotometric data reduction software package for automated quantitative spectral classification of stars. Baltic Astronomy, 1, 526−544.
6.2.
1992
Pelt, J. (1992). Irregularly spaced data analysis - User Manual. Helsinki : Helsinki University Press.
1.1.
1991
Pavlenko, E.; Pelt, J. (1991). Synchronization of the components of the magnetic novae V1500 Cygni components. Astronomy & Astrophysics, 34, 169−174.
3.4.
1991
Malyuto, V.; Pelt, J.; Shvelidze, T. (1991). An automatic spectrophotometric data reduction system for quantitative spectral classification of stars. Data analysis in astronomy IV (65−71).. New York and London: Plenum Press.
1.2.
1990
Pelt, J. (1990). A method of continuum estimation in spectral classification experiments. Bulletin d'information du Centre de Données Stellaires, 38, 95−107.
3.4.
1990
Jetsu, L.; Pelt, J.;Tuominen, I.; Nations, H. L. (1990). The spot activity of FK Comae Berenices. The Sun and cool stars: activity, magnetism, dynamos, Proc. of Coll. No.130 of the IAU, Helsinki, Finland. 381−383.
1.3.
1989
Malyuto, V.; Pelt, J. (1989). Methods for automatic spectral measurements for spectral classification of the F,G,K stars ( in Russian ). Bull. Astrophys. Obs. Abastumani (233−244)..
1.2.
1988
Pavlenko, E.; Pelt, J. (1988). Slow variability of V1500 Cyg. Inf.Bull. Variable Stars (1−3)..
3.2.
1988
Hanni, U.; Pelt, J. (1988). Radial velocity variations in the spectrum of 68 Cygni. Tartu Astrofuus. Obs. Teated (200−202)..
1.2.
1986
Hanni, U.; Pelt, J. (1986). Radial velocity variations in the spectrum of the O star 68 Cygni. Pis'ma Astron. Zh (541−545).. (12).
3.2.
1986
Malyuto, V.; Pelt, J.; Chargeishvili, K. (1986). Thechnique and accuracy of automatic measuerements of hydrogen line intensities from objective prism spectra. Tartu Astrofüüsika Observatooriumi Teated (19−28)..
3.2.
1983
Pelt, J. (1983). Phase dispersion minimization methods for estimation of periods from unequally spaced sequences of data. ESA Spec. Publ., ESA SP (37−42)..
1.2.
1982
Malyuto, V.; Pelt, J. (1982). Further experiments in automatic quantitative spectral classification at Tartu. Bulletin d'information du Centre de Données Stellaires, 23, 29−40.
3.2.
1981
Malyuto, V.; Pelt, J. (1981). Automatic quantitative spectral classification of stars. I. Observational data reduction. In: Acad. Sci. Estonian SSR, Prepr. (1−15)..
2.2.
1980
Pelt, J. (1980). Frequency analysis of astronomical time sequences. Tallinn: Valgus.
3.2.
1975
Pelt, J. (1975). Methods for search of variable star periods. Tartu Astron. Obs. Teated (1−24)..
22.04.2019

Jaan Pelt

https://www.etis.ee/CV/Jaan_Pelt/eng
15.03.1947
737 4516
53416372
jaan.pelt@ut.ee
http://

Career

Institution(s) and position(s)
01.01.2018–31.12.2019   
University of Tartu, Faculty of Science and Technology, Tartu Observatory, Senior Research Fellow (0,80)
01.01.1993–...   
1993-present Senior Research Associate, Tartu Observatory
01.01.2017–31.12.2017   
Tartu Observatory, Senior Researcher (0,80)
2012–31.12.2017   
Tartu Observatory, Research Professor (1,00)
1995–2012   
Tartu Observatory, Senior Researcher (1,00)
01.01.1982–31.12.1992   
1982-1992 Senior Research Associate, Institute of Astrophysics and Atmospheric Physics
01.01.1974–31.12.1982   
1974-1982 Junior Research Associate, Institute of Astrophysics and Atmospheric Physics
 
 
Education
Tartu State University, M.Sc. in applied mathematics, 1974
 
 
R&D related managerial and administrative work
2012−...   
Aalto University, Department of Information and Computer Science, frequent visits, participation in the work of Centre of Excelence ReSoLVE (resource person)
2007−...   
Has been appointed to Docent of Astronomy at he University of Helsinki, Finland
In 1981 worked as a visiting research fellow in Konkoly Observatory, Budapest, Hungary (for 3 months)
In 1990-1996 in Laboratory of Astrophysics, Helsinki University, Finland (altogether for 12 months)
In 1996-2004 in Oulu University, Finland (altogether for 13 months)
In 1992-1995 in Hamburg Observatory, Hamburg University, Germany (altogether 6 months)
In 1997 in NORDITA, Denmark (for 1 month)
In 1997-1998 in Centre for Advanced Study, Oslo, Norway (for 8 months)
In 1999-2002 in Oslo University, Norway (altogether 4 months)

Qualifications

Academic degrees
Jaan Pelt, Doctor's Degree, 1981, (sup) Tõnu Kipper, Частотный анализ астрономических временных рядов (Frequency analysis of astronomical time series), Astrofüüsika ja Atmosfäärifüüsika Instituut.
 
 

Projects in progress

Completed projects

Supervised dissertations

Publications

Category
Year
Publication
 
1.1.
2018
Olspert, N.; Pelt, J.; Käpylä, M.J.; Lehtinen, J (2018). Estimating activity cycles with probabilistic methods I. Bayesian generalised Lomb-Scargle periodogram with trend. Astronomy & Astrophysics, 615 (A111), 1−12.10.1051/0004-6361/201732524.
1.1.
2018
Olspert, N.; Lehtinen, J.; Käpylä, M. J.; Pelt, J.; Grigorievskiy, A. (2018). Estimating activity cycles with probabilistic methods II. The Mount Wilson Ca H&K data. Astronomy & Astrophysics, 619 (A6), 1−20.10.1051/0004-6361/201732525.
6.3.
2018
Pelt, Jaan (2018). Südametuksetähed. Sirp (27−29).31.08.2018 SA Kultuurileht.
1.1.
2017
Peets, P.; Leito, I.; Pelt, J.; Vahur, S. (2017). Identification and classification of textile fibres using ATR-FT-IR spectroscopy with chemometric methods. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 173, 175−181.10.1016/j.saa.2016.09.007.
1.1.
2017
Pelt, Jaan; Käpylä, Maarit; Nigul Olspert (2017). Method of frequency dependent correlations: investigating the variability of total solar irradiance. Astronomy & Astrophysics, 600 (A9), 1−19.10.1051/0004-6361/201527816.
1.1.
2017
Hirv, A.; Pelt, J.; Saar, E.; Tago, E.; Tamm, A.; Tempel, E.; Einasto, M. (2017). Alignment of galaxies relative to their local environment in SDSS-DR8. Astronomy & Astrophysics, 599, A31−15.10.1051/0004-6361/201629248.
5.2.
2017
Olspert, N; Käpylä, M.J., Pelt, J (2017). From periods to cycles: new methods applied to solar, stellar and “in silico” data. 1−1.
6.3.
2017
Pelt, Jaan (2017). Ameerika varjutus. Sirp (33−35).09.06.2017 SA Kultuurileht.
6.3.
2017
Jaan, Pelt (2017). Kuidas jõudis kuld sõrmusesse. Horisont, 5, 12−18.
1.1.
2016
Käpylä, M.J.; Käpylä, P.J; Olspert, N.; Brandenburg, A.; Warnecke, J.; Karak, B.B.; Pelt, J. (2016). Multiple dynamo modes as a mechanism for long-term solar activity variations. Astronomy & Astrophysics, 589 (A56), 1−24.10.1051/0004-6361/201527002.
3.1.
2016
Olspert, Nigul; Käpylä, Maarit; Jaan Pelt (2016). Method for estimating cycle lengths from multidimensional time series: Test cases and application to a massive "in silico" dataset. Proceedings: 2016 IEEE International Conference on Big Data (Big Data), December 5 - December 8, 2016, Washington DC , USA. IEEE, 3214−3223.BigData.2016.7840977.
5.2.
2016
Kilpua, E.; Olspert, N.; Grigorievskiy, A.; Käpylä, M.; Tanskanen, E.; Kataoka, R.; Miyahara, H.; Pelt, J.; Ying, L. (2016). Statistical study of strong and extreme geomagnetic disturbances and solar cycle characteristics. Geophysical Research Abstracts, 18, EGU2016-3407.
6.3.
2016
Pelt, J (2016). Astronoomid ja aeg. Sirp (12−13). SA Kultuurileht.
6.3.
2016
Pelt, J (2016). Väikesed varjutajad, mõned neist varastatud. Sirp (27−29). SA Kultuurileht.
1.1.
2015
Kilpua, E.K.J.; Olspert, N.; Grigorievskiy, A.; Käpylä, M.J.; Tanskanen, E.I.; Miyahara, H.; Kataoka, R.; Pelt, J.; Liu, Y.D. (2015). Statistical study of strong and extreme geomagnetic disturbances and solar cycle characteristics. The Astrophysical Journal, 806 (2, 272), 1−7.
1.1.
2015
Karak, B.B.; Kapyla, P.J.; Kapyla, M.J.; Brandenburg, A.; Olspert, N.; Pelt, J. (2015). Magnetically controlled stellar differential rotation near the transition from solar to anti-solar profiles. Astronomy & Astrophysics, 576, 1−17.10.1051/0004-6361/201424521.
1.1.
2015
Olspert, N.; Käpylä, M.J.; Pelt, J.; Cole, E.M; Hackman, T.; Lehtinen, J.; Henry, G.W. (2015). Multiperiodicity, modulations and flip-flops in variable star light curves III. Carrier fit analysis of LQ Hya photometry for 1982-2014. Astronomy & Astrophysics, 577, 1−13.
6.3.
2015
Pelt, Jaan (2015). Maakera saab nägijaks. Tartu Tähetorni Kalender, 92, 49−62.
1.1.
2014
Tempel, E.; Kipper, R.; Saar, E.; Bussov, M.; Hektor, A.; Pelt, J. (2014). Galaxy filaments as pearl necklaces. Astronomy & Astrophysics, 572, A8.dx.doi.org/10.1051/0004-6361/201424418.
1.1.
2013
Hackman, T.; Pelt, J.; Mantere, M.J.; Jetsu, L.; Korhonen, H.; Granzer, T.; Kajatkari, P.; Lehtinen, J.; Strassmeier, K.G (2013). Flip-flops of FK Comae Berenices. Astronomy & Astrophysics, 553, 1−13.
1.1.
2013
Lindborg, M.; Mantere, M.J.; Olspert, N.; Pelt, J.; Hackman, T.; Henry, G.W.; Jetsu, L.; Strassmeier, K.G. (2013). Multiperiodicity, modulations and flip-flops in variable star light curves II. Analysis of II Pegasus photometry during 1979–2010. Astronomy & Astrophysics, 559, 1−10.
3.1.
2013
Mantere, M.J; Käpylä, P.; Pelt, J. (2013). Role of longitudinal activity complexes for solar and stellar dynamos. In: A.G. Kosovichev, E.M. de Gouveia Dal Pino & Y. Yan (_EditorsAbbr). Solar and Astrophysical Dynamos and Magnetic Activity (IAU S294) (175−186).. Cambridge University Press. (Proceedings of the International Astronomical Union; 8).
6.3.
2013
Pelt, Jaan (2013). Untsu läinud tähed. Tartu Tähetorni Kalender, 90, 86−91.
1.3.
2012
Pelt, Jaan; Kärner, Olavi (2012). On the variability of total solar irradiance. Space Research Review, 1: Baltic Applied Astroinformatics and Space data Processing, Ventspils, 7-8 May 2012. Engineering Research Institute "Ventspils International Radio Astronomy Centre" of Ventspils Univers, 183−195.
5.2.
2012
Hackman, T.; Pelt, J; Mantere, M.J.; Jetsu, L; Ilyin, I.; Kochukov, O.; Korhonen, H.; Lehtinen, J.; Lindborg, M; Piskunov, N. (2012). Flip-flops and dynamo waves in late-type stars. 1−1.
1.1.
2011
Pelt, J.; Olspert, N.; Mantere, M.J.; Tuominen, I. (2011). Multiperiodicity, modulations and flip-flops in variable star light curves I. Carrier fit method. Astronomy & Astrophysics, 535, 1−12.
1.1.
2011
Hirv, A.; Olspert, N.; Pelt, J. (2011). Towards the Automatic Estimation of Gravitational Lense's Time Delays. Baltic Astronomy, 20, 125−144.
1.1.
2010
Pelt, J.; Korpi, M.J.; Tuominen, I. (2010). Solar active regions: a nonparametric statistical analysis. Astronomy & Astrophysics, 513, 1−7.
6.3.
2010
Pelt, Jaan (2010). Muutuv Päike, muutuvad tähed ja meie. Tartu Tähetorni Kalender, 86, 88−92.
1.1.
2009
Pelt, Jaan (2009). High frequency limits in periodicity search from irregularly spaced data. Baltic Astronomy, 18, 83−92.
6.3.
2009
Pelt, Jaan (2009). Mis toimub Päikese sees? Kuidas me seda teame. Horisont, 1, 10−15.
6.2.
2008
Pelt, Jaan (2008). Irregularly spaced data analysis in astronomy and related sciences. Lecture notes and illustrations. 1−873.
6.3.
2008
Pelt, Jaan (2008). Gravitatsioonilääts teeb nähtamatu nähtavaks. Horisont, 1, 10−17.
1.1.
2007
Tuominen, Ilkka; Pelt, Jaan; Brooke, John; Korpi, Maarit. (2007). Does the Sun have a face? Astronomische Nachrichten, 328 (10), 1020−1022.
1.1.
2007
Hirv, Anti; Eenmäe, Tõnis; Liivamägi, Juhan; Pelt, Jaan (2007). Estimation of Time Delays from Two Blended Light Curves of Gravitational Lenses. Baltic Astronomy, 16, 241−250.
1.1.
2007
Hirv, A.; Eenmäe, T.; Liimets, T; Liivamägi, L.J.; Pelt, J. (2007). Estimation of time delays from unresolved photometry. Astronomy & Astrophysics, 464, 471−478.
6.3.
2007
Pelt, Jaan (2007). Katsume harjuda. Indrek Rohtmets, Toomas Kukk (_EditorsAbbr). Lehed ja tähed (64−71).. MTÜ Loodusajakiri.
6.3.
2007
Pelt, Jaan (2007). Tume aine – vaade tagasi. Horisont, 2, 50−51.
1.1.
2006
Pelt, J.; Brooke, J.M.; Korpi, M.J.; Tuominen, I. (2006). Kinematic frames and ``active longitudes'': does the Sun have a face? Astronomy & Astrophysics, 460, 875−885.
1.1.
2006
Hirv, A., Annuk, K., Eenmäe, T., Liimets, T., Pelt, J., Puss, A., Tempel, M. (2006). Orbital elements and mass-loss rate of V444 Cyg. Baltic Astronomy, 15 (3), 405−412.
6.3.
2006
Pelt, Jaan (2006). Kas Päikesel on nägu? Tartu Tähetorni Kalender, 82, 79−85.
6.7.
2006
Korpi, M. J.; Pelt, J.; Brooke, J. M.; Tuominen, I. (2006). On the nonaxisymmetricity of the sunspot distribution: kinematic frame constructions and their implications (Poster). In: (1−1).Solar and Stellar Activity Cycles, 26th meeting of the IAU, Joint Discussion 8, 17-18 August 2006, Prague, Czech Republic. IAU. (JD08).
1.1.
2005
Pelt, J.; Tuominen, I.; Brooke, J. (2005). Century-scale persistence in longitude distribution in the Sun and in silico. Astronomy & Astrophysics, 429, 1093−1096.
1.1.
2005
Tõnsuaadu, K.; Pelt, J.; Borissova, M. (2005). Monitoring of the evolved gases in apatite-ammonium sulfate thermal reactions. Journal of Thermal Analysis and Calorimetry, 80 (3), 655−658.
3.2.
2005
Pelt, J. (2005). Estimation of time delays from unresolved photometry. 5−15.
6.3.
2005
Pelt, Jaan (2005). Kuidas ma arvutasin maailma vanust. Tartu Tähetorni Kalender, 81, 64−70.
6.7.
2005
Masing, Uku; Masing, Uku; Masing, Eha; Runnel, Hando; Kasemaa, Kalle; Tihemets, Evi; Leetaru, Ilse; Pelt, Jaan (2005). Luule VI. Tartu: Ilmamaa.
1.1.
2004
Tõnsuaadu, Kaia; Borissova, Maria; Bender, Villem; Pelt, Jaan (2004). Thermal Reactions in Synthetic Apatite – Ammonium Sulfate Mixture, Phosphorus, Sulfur, and Silicon and Related Elements. Phosphorus Sulfur and Silicon and the Related Elements, 179 (11), 2395−2407.
1.1.
2004
Kaljuvee, T.; Pelt, J.; Radin, M. (2004). TG-FTIR study of gaseous compounds evolved at thermooxidation of oil shale. Journal of Thermal Analysis and Calorimetry, 78 (2), 399−414.
5.1.
2004
Tõnsuaadu, K.; Pelt, J.; Borissova, M. (2004). Monitoring of the Evolved Gases by FTIR Spectroscopy in Apatite - Ammonium Sulfate Thermal Reactions. 13th International Congress on Thermal Analysis and Calorimetry, Book of Abstracts, Chia Laguna, September 12-19. 357−357.
6.7.
2004
Olspert, Nigul (2004). Mikrolääts-efekti hindamine kaksik-kvasari heleduskõverate põhjal. (Magistritöö, Tartu Ülikool). University of Tartu.
6.2.
2003
Pelt, J. (2003). Astronomical Time Series Analysis. 1−163.
1.1.
2002
Pelt, J.; Refsdal, S.; Stabell, R. (2002). Bias and Consistency in Time Delay Estimation Methods: Case of the Double Quasar He 1104-1805. Astronomy & Astrophysics, 389, L57−L60.
1.1.
2002
Hjorth, J.; Burud, I.; Jaunsen, A. O.; Schechter, P. L.; Kneib, J. P.; Andersen, M. I.; Korhonen, H.; Clasen, J. W.; Kaas, A. A.; Ostensen, R.; Pelt, J.; Pijpers, F. P. (2002). The Time Delay of the Quadruple Quasar Rx J0911.4+0551. Astrophysical Journal, 572, L11−L14.
1.1.
2002
Brooke, J. M.; Pelt, J.; Pulkkinen, P.; Tuominen, I. (2002). The Importance of Spatial Information in Sunspot Records. H. Rickman. Highlights of Astronomy (334−337).. Astronomical Society of Pacific.
1.1.
2002
Berdyugina, S. V.; Pelt, J.; Tuominen, I. (2002). Magnetic Activity in the Young Solar Analog Lq Hydrae - I. Active Longitudes and Cycles. Astronomy & Astrophysics, 394, 505−515.
3.2.
2002
Pelt, J. (2002). Dispersion spectra - from time delays to frequency analysis. In: Actes des XXXIVes Journees de Statistique (121−122).XXXIVes Journees de Statistique, Bruxelles et Louvain-la-Neuve, 13-17 mai 2002. N/A.
3.4.
2002
Tõnnisson, T; Pelt, J; Vince, B (2002). Portable optical spectrum analyzer for testing optical DWDM telecommunication systems. 341−342.
3.4.
2002
Tõnnisson, T.; Pelt, J.; Vince, B. (2002). Portable optical spectrum analyzer for testing optical DWDM telecommunication systems. Proceedings of the 8th Biennial Baltic Electronics Conference, Tallinn Technical University, October 6-9. Tallinn Technical University, 341−342.
1.1.
2001
Petrov, P. P.; Pelt, J.; Tuominen, I. (2001). Periodic Variations in the Colours of the Classical T Tauri Star Rw Aur a. Astronomy & Astrophysics, 375, 977−981.
3.1.
2001
Brooke, J. M.; Pelt, J.; Pulkkinen, P.; Tuominen, I. (2001). Symmetries of the solar dynamo: comparing theory with observation. Dynamo and Dynamics, a Mathematical challenge (331−338).. Kluwer : Kluwer Academic Publishers.
3.4.
2001
Refsdal, S.; Stabell, R.; Pelt, J.; Schild, R. (2001). Constraints on source and lens parameters from microlensing variability in QSO 0957+561 A,B, Gravitational Lensing. Recent Progress and Future Goals, ASP Conference Proceedings Series, CS-237. 197−197.
1.1.
2000
You, J.; Pelt, J.; Tuominen, I. (2000). Period Analysis for Simultaneous Multichannel Photometric Observations. Astronomy and Astrophysics Supplement Series, 146, 397−406.
1.1.
2000
Refsdal, S.; Stabell, R.; Pelt, J.; Schild, R. (2000). Constraints on Source and Lens Parameters From Microlensing Variability in Qso 0957+561 a,B. Astronomy & Astrophysics, 360, 10−14.
1.1.
2000
Pelt, J.; Brooke, J.; Pulkkinen, P. J.; Tuominen, I. (2000). A New Interpretation of the Solar Magnetic Cycle. Astronomy & Astrophysics, 362, 1143−1150.
1.1.
2000
Jetsu, L.; Pelt, J. (2000). Spurious Periods in the Terrestrial Impact Crater Record. Astronomy & Astrophysics, 353, 409−418.
1.1.
2000
Burud, I.; Hjorth, J.; Jaunsen, A. O.; Andersen, M. I.; Korhonen, H.; Clasen, J. W.; Pelt, J.; Pijpers, F. P.; Magain, P.; Ostensen, R. (2000). An Optical Time Delay Estimate for the Double Gravitational Lens System B1600+434. Astrophysical Journal, 544, 117−122.
1.1.
1999
Pulkkinen, P. J.; Brooke, J.; Pelt, J.; Tuominen, I. (1999). Long-Term Variation of Sunspot Latitudes. Astronomy & Astrophysics, 341, L43−L46.
1.1.
1999
Jetsu, L.; Pelt, J.; Tuominen, I. (1999). Time Series Analysis of V 1794 Cygni Long-Term Photometry. Astronomy & Astrophysics, 351, 212−224.
1.1.
1999
Jetsu, L.; Pelt, J. (1999). Three Stage Period Analysis and Complementary Methods. Astronomy and Astrophysics Supplement Series, 139, 629−643.
1.1.
1998
Pelt, J.; Schild, R.; Refsdal, S.; Stabell, R. (1998). Microlensing on Different Timescales in the Lightcurves of Qso 0957+561 a,B. Astronomy & Astrophysics, 336, 829−839.
1.1.
1998
Pelt, J.; Hjorth, J.; Refsdal, S.; Schild, R.; Stabell, R. (1998). Estimation of Multiple Time Delays in Complex Gravitational Lens Systems. Astronomy & Astrophysics, 337, 681−684.
1.1.
1998
Brooke, J. M.; Pelt, J.; Tavakol, R.; Tworkowski, A. (1998). Grand Minima and Equatorial Symmetry Breaking in Axisymmetric Dynamo Models. Astronomy & Astrophysics, 332, 339−352.
1.1.
1997
Jetsu, L.; Pohjolainen, S.; Pelt, J.; Tuominen, I. (1997). Is the Longitudinal Distribution of Solar Flares Nonuniform? Astronomy & Astrophysics, 318, 293−307.
1.1.
1997
Duemmler, R.; Pelt, J.; Korhonen, H.; Iliev, I. (1997). Is Beta Crateris a Sirius-Like System? Astronomy & Astrophysics, 328, L37−L39.
3.1.
1997
Pelt, J. (1997). Nonparametric methods for shift and periodicity detection in irregularly measured data. eds. T. Subba Rao and M.B. Priestley. Time Series Analysis in Astronomy and Meteorology (249−263).. Chapman & Hall.
3.1.
1997
Pelt, J. (1997). Fast computation of trigonometric sums with applications to frequency analysis of astronomical data, in Astronomical Time Series. Proceedings of the the Florence and Georg Wise Observatory 25th Anniversary Symposium, held in Tel-Aviv, Isreal, 30 December 1996- 1 January 1997. Dordrecht: Kluwer Academic Publishers, 179−182.
1.1.
1996
Pelt, J.; Kayser, R.; Refsda, S.; Schramm, T. (1996). The light curve and time delay of QSO 0957+561. Astronomy & Astrophysics, 305, 97−106.
1.1.
1996
Jetsu, L.; Pelt, J. (1996). Searching for periodicity in weighted time point series. Astronomy and Astrophysics Supplement Series, 118, 587−594.
3.4.
1996
Jetsu, L.; Pohjolainen, S.; Pelt, J.; Tuominen, I. (1996). Longitudinal distribution of major solar flares. Stellar Systems and the Sun, 109. 135−136. ( ASP Conf. Series).
3.4.
1996
Pelt, J.; Kayser, R.; Schild, R.; Thomson, D.J. (1996). The time delay between QSO 0957+561 A,B. Examing the Big Bang and Diffuse Background Radiations, IAU Symposium 168, Hague August 23-27. 539−540.
1.1.
1994
Pelt, J.; Hoff, W.; Kayser, R.; Refsdal, S.; Schramm, T. (1994). Time delay controversy on QSO 0957+561 A,B not yet decided. Astronomy & Astrophysics, 286, 775−785.
1.1.
1993
Schramm, K.-J.; Borgeest, U.; Camenzind, M.; Wagner, S. J.; Bade, N.; Dreissigacker, O.; Heidt, J.; Hoff, W.; Kayser, R.; Kuhl, D.; von Linde, J.; Linnert, M. D.; Pelt, J.; Schramm, T.; Sillanpaa, A.; Takalo, L. O.; Valtaoja, E.; Vigotti, M. (1993). Recent activity in the optical and radio lightcurves of the blazar 3C 345: indications for a 'lighthouse effect' due to jet rotation. Astronomy & Astrophysics, 278, 391−405.
1.1.
1993
Jetsu, L.;Pelt, J.;Tuominen, I. (1993). Spot and flare activity of FK Comae Berenices: long term photometry. Astronomy & Astrophysics, 278, 449−462.
3.1.
1993
Jetsu, L.; Tuominen, I.; Pelt, J. (1993). Time series analysis of FK Comae and LQ. T. Subba Rao, M.B. Priestley, O. Lessi. Aplications of Time Series Analysis in Astronomy and Meteorology (199−202).. Chapman & Hall.
3.1.
1993
Pelt, J. (1993). Nonparametric methods for shift and periodicity detection in irregularly measured data. T. Subba Rao, M.B. Priestley, O. Lessi. Aplications of Time Series Analysis in Astronomy and Meteorology (149−157).. Chapman & Hall.
3.4.
1993
Pelt, J. (1993). Multistage search for hidden patterns in irregularly observed time series. 5th ESO /ST-ECF Data Analysis Workshop, Garching, 26-27 April. 179−184.
3.4.
1993
Schramm, T.; Pelt, J. (1993). The sampling problem. Proceedings of the 1st MEGAPHOT Workshop, held in Hamburg, 1993 March 30/31. 48−57.
1.1.
1992
Malyuto, V.; Pelt, J.; Shvelidze, T. (1992). The spectrophotometric data reduction software package for automated quantitative spectral classification of stars. Baltic Astronomy, 1, 526−544.
6.2.
1992
Pelt, J. (1992). Irregularly spaced data analysis - User Manual. Helsinki : Helsinki University Press.
1.1.
1991
Pavlenko, E.; Pelt, J. (1991). Synchronization of the components of the magnetic novae V1500 Cygni components. Astronomy & Astrophysics, 34, 169−174.
3.4.
1991
Malyuto, V.; Pelt, J.; Shvelidze, T. (1991). An automatic spectrophotometric data reduction system for quantitative spectral classification of stars. Data analysis in astronomy IV (65−71).. New York and London: Plenum Press.
1.2.
1990
Pelt, J. (1990). A method of continuum estimation in spectral classification experiments. Bulletin d'information du Centre de Données Stellaires, 38, 95−107.
3.4.
1990
Jetsu, L.; Pelt, J.;Tuominen, I.; Nations, H. L. (1990). The spot activity of FK Comae Berenices. The Sun and cool stars: activity, magnetism, dynamos, Proc. of Coll. No.130 of the IAU, Helsinki, Finland. 381−383.
1.3.
1989
Malyuto, V.; Pelt, J. (1989). Methods for automatic spectral measurements for spectral classification of the F,G,K stars ( in Russian ). Bull. Astrophys. Obs. Abastumani (233−244)..
1.2.
1988
Pavlenko, E.; Pelt, J. (1988). Slow variability of V1500 Cyg. Inf.Bull. Variable Stars (1−3)..
3.2.
1988
Hanni, U.; Pelt, J. (1988). Radial velocity variations in the spectrum of 68 Cygni. Tartu Astrofuus. Obs. Teated (200−202)..
1.2.
1986
Hanni, U.; Pelt, J. (1986). Radial velocity variations in the spectrum of the O star 68 Cygni. Pis'ma Astron. Zh (541−545).. (12).
3.2.
1986
Malyuto, V.; Pelt, J.; Chargeishvili, K. (1986). Thechnique and accuracy of automatic measuerements of hydrogen line intensities from objective prism spectra. Tartu Astrofüüsika Observatooriumi Teated (19−28)..
3.2.
1983
Pelt, J. (1983). Phase dispersion minimization methods for estimation of periods from unequally spaced sequences of data. ESA Spec. Publ., ESA SP (37−42)..
1.2.
1982
Malyuto, V.; Pelt, J. (1982). Further experiments in automatic quantitative spectral classification at Tartu. Bulletin d'information du Centre de Données Stellaires, 23, 29−40.
3.2.
1981
Malyuto, V.; Pelt, J. (1981). Automatic quantitative spectral classification of stars. I. Observational data reduction. In: Acad. Sci. Estonian SSR, Prepr. (1−15)..
2.2.
1980
Pelt, J. (1980). Frequency analysis of astronomical time sequences. Tallinn: Valgus.
3.2.
1975
Pelt, J. (1975). Methods for search of variable star periods. Tartu Astron. Obs. Teated (1−24)..
22.04.2019
Detailne otsing
  • Leitud 6 kirjet
ProgrammLiikNumberNimiProjekti algusProjekti lõppVastutav täitjaAsutusFinantseerijapoolne rahastamine
ETFETF6813Dispersioonispektrite teooria ja rakendused01.01.200631.12.2009Jaan PeltTartu Observatoorium24 296,66 EUR
SFSF0060030s08Evolutsiooni hilisfaasides tähtede ja nende ümbriste vaatluslik ja teoreetiline uurimine.01.01.200831.12.2013Tõnu KipperTartu Observatoorium1 741 486,12 EUR
IUTIUT40-1Massiivsete tähtede muutlikkus ja evolutsioon Gaia ajastul01.01.201531.12.2020Indrek KolkaTartu Observatoorium; Tartu Ülikool, Loodus- ja täppisteaduste valdkond, Tartu observatoorium250 000,00 EUR
HLKHLK07-20Tartu Observatooriumi teadusajaloolise arhiivi korrastamine ja digitaliseerimine01.01.200723.12.2007Kalju AnnukTartu Observatoorium4 473,82 EUR
TKSLTTO16133T (TK133)Tume universum (TK133)01.03.201601.03.2023Elmo TempelTartu Observatoorium; Tartu Ülikool, Loodus- ja täppisteaduste valdkond, Tartu observatoorium1 146 376,00 EUR
SFSF0062464s03Tähtede ehitus, keemiline koostis ja evolutsioon.01.01.200331.12.2007Tõnu KipperTartu Observatoorium894 251,78 EUR