[ sulge aken ]

Elulookirjeldus (CV)
1.Eesnimi Jaan
2.Perekonnanimi Pelt
3.Töökoht Tartu Observatoorium
4.Ametikoht vanemteadur
5.Sünniaeg 15.03.1947 (päev.kuu.aasta)
6.Haridus Tartu Riiklik Ülikool, rakendusmaatemaatika eriala, 1974
7.Teenistuskäik 1974-1982 nooremteadur Astrofüüsika ja Atmosfäärifüüsika Instituudis

1982-1992 vanemteadur Astrofüüsika ja Atmosfäärifüüsika Instituudis

1993 - praeguseni vanemteadur Tartu Observatooriumis
8.Teaduskraad füüs.- mat. kandidaat
9.Teaduskraadi välja
andnud asutus, aasta		 Astrofüüsika ja Atmosfäärifüüsika Instituut, 1981
10.Tunnustused
11.Teadusorganisatsiooniline
ja –administratiivne
tegevus		 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)
12.Juhendamisel kaitstud
väitekirjad

Lauri Jetsu, PhD, 1994, juh. Ilkka Tuominen ja Jaan Pelt. Time dependent phenomena in the photometry of starspots. Helsingi Ülikool
13.Teadustöö põhisuunad Matemaatilise statistika meetodite rakendamine astronoomias ja astrofüüsikas. Muutlike tähtede ja aktiivsete galaktikatuumade heleduskõverate uurimine. Gravitatsiooniläätsedega ja päikeseplekkidega seonduvad statistilised probleemid. Fourier spektomeetria infrapunases piirkonnas, kasutades kaasaegseid lugemismeetodeid. Nõrkade signaalide ajast sõltuv spektromeetria rakendustega astronoomias ja keemias.
14.Jooksvad grandid
15.Teaduspublikatsioonid

Pelt J. (2005), Estimation of time delays from unresolved photometry, 25 Years After the Discovery: Some Current Topics on Lensed QSOs e-Edited by Luis J. Goicoechea (UC, Spain). On-line at http://grupos.unican.es/glendama/e-Proc.htm, 1-14

Pelt J., Tuominen I., Brooke J.(2005),Century-scale persistence in longitude distribution in the Sun and in silico, Astronomy and Astrophysics, 429(3), pp. 1093-1096.

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, pp. 655-658.

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, 399-414.

Tõnsuaadu K., Borissova M., Bender V., Pelt J.(2004),Thermal Reactions in Synthetic Apatite - Ammonium Sulfate Mixture. Phosphorus, Sulfur, and Silicon and the Related Elements, 179, 2395-2407.

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.

Pelt J. (2003), Astronomical Time Series Analysis, Oulu University, 23 October - 18 November, 1-163

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(2), 505-515.

Brooke, J. M., Pelt, J., Pulkkinen, P., & Tuominen, I.(2002), The Importance of Spatial Information in Sunspot Records. Highlights of Astronomy, Vol 12, 12, 334-337.

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(1), L11-L14.

Pelt J.(2002), Dispersion spectra - from time delays to frequency analysis, in Actes des XXXIVes Journees de Statistique, Bruxelles et Louvain-la-Neuve, 13-17 mai, 121-122.

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(2), L57-L60.

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, 341-342.

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, P. Chossat et al. (eds.), Kluwer Academic Publishers, 331-338.

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(3), 977-981.

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, vol. CS-237,197.

Brooke J.M, Pelt J., Pulkkinen P., Tuominen I.(2000), The importance of spatial information in sunspot records, Applied Historical Astronomy, 24th meeting of the IAU, Joint Discussion 6, August 2000, Manchester, England

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(1), 117-122.

Jetsu, L., & Pelt, J.(2000), Spurious Periods in the Terrestrial Impact Crater Record. Astronomy and Astrophysics, 353(1), 409-418.

Pelt, J., Brooke, J., Pulkkinen, P. J., & Tuominen, I.(2000), A New Interpretation of the Solar Magnetic Cycle. Astronomy and Astrophysics, 362(3), 1143-1150.

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 and Astrophysics, 360(1), 10-14.

You, J., Pelt, J., & Tuominen, I.(2000), Period Analysis for Simultaneous Multichannel Photometric Observations. Astronomy & Astrophysics Supplement Series, 146(3), 397-406.

Jetsu, L., & Pelt, J.(1999), Three Stage Period Analysis and Complementary Methods. Astronomy & Astrophysics Supplement Series, 139(3), 629-643.

Jetsu, L., Pelt, J., & Tuominen, I.(1999), Time Series Analysis of V 1794 Cygni Long-Term Photometry. Astronomy and Astrophysics, 351(1), 212-224.

Pulkkinen, P. J., Brooke, J., Pelt, J., & Tuominen, I.(1999), Long-Term Variation of Sunspot Latitudes. Astronomy and Astrophysics, 341(2), L43-L46.

Brooke, J. M., Pelt, J., Tavakol, R., & Tworkowski, A.(1998), Grand Minima and Equatorial Symmetry Breaking in Axisymmetric Dynamo Models. Astronomy and Astrophysics, 332(1), 339-352.

Pelt, J., Hjorth, J., Refsdal, S., Schild, R., & Stabell, R. (1998). Estimation of Multiple Time Delays in Complex Gravitational Lens Systems. Astronomy and Astrophysics, 337(3), 681-684.

Pelt, J., Schild, R., Refsdal, S., & Stabell, R. (1998). Microlensing on Different Timescales in the Lightcurves of Qso 0957+561 a,B. Astronomy and Astrophysics, 336(3), 829-839.

Duemmler, R., Pelt, J., Korhonen, H., & Iliev, I. (1997). Is Beta Crateris a Sirius-Like System? Astronomy and Astrophysics, 328(2), L37-L39.

Jetsu, L., Pohjolainen, S., Pelt, J., & Tuominen, I. (1997). Is the Longitudinal Distribution of Solar Flares Nonuniform? Astronomy and Astrophysics, 318(1), 293-307.

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, Eds. D. Maoz, A. Sternberg, E.M. Leibowitz, Kluwer Academic Publishers, Dordrecht, 179-182.

Pelt J.(1997), Nonparametric methods for shift and periodicity detection in irregularly measured data, in Time Series Analysis in Astronomy and Meteorology, eds. T. Subba Rao and M.B. Priestley, Chapman & Hall, 249-263.

Jetsu L., Pelt J. (1996), Searching for periodicity in weighted time point series, Astronomy and Astrophysics Supplement, 118, 587-594.

Jetsu L., Pohjolainen S., Pelt J., Tuominen I. (1996), Longitudinal distribution of major solar flares, in Ninth Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, eds. R. Pallavicini, A. Dupree, 1996, ASP Conf. Series, Vol. 109, 135-136.

Pelt J., Kayser R., Refsdal S., Schramm T. (1996), The light curve and time delay of QSO 0957+561, Astronomy and Astrophysics, 305, 97-106.

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.

Pelt J., Hoff W., Kayser R., Refsdal S., Schramm T. (1994), Time delay controversy on QSO 0957+561 A,B not yet decided, Astronomy and Astrophysics, 286, 775-785.

Jetsu L.,Pelt J.,Tuominen I. (1993), Spot and flare activity of FK Comae Berenices: long term photometry, Astronomy and Astrophysics, 278, 449-462.

Jetsu L., Tuominen I., Pelt J. (1993), Time series analysis of FK Comae and LQ Hydrae, ibid, 199-202.

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.

Pelt J. (1993), Nonparametric methods for shift and periodicity detection in irregularly measured data, International Conference on Aplications of Time Series Analysis in Astronomy and Meteorology, Universit`a di Padova, Italy, September 6-10, 149-157.

Schramm K.-J., Borgeest U., Camenzind M., Wagner S.J., Bade N., Dreissigacker O., Heidt J., Hoff W., Kayser R., K\"uhl D., Linde J. v., Linnert M.D., Pelt J., Schramm T. (1993), Vigotti M., Again an active period in the optical light curve of the blazar 3C345: a ''lighthouse effect'' due to helical motion in the jet? Astronomy and Astrophysics 278, 1993, 391-405.

Schramm T., Pelt J., The sampling problem (1993), Proceedings of the 1st MEGAPHOT Workshop, held in Hamburg, 1993 March 30/31, 48-57.

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.

Pelt J. (1992), Irregularly spaced data analysis - User Manual, Helsinki University Press, Helsinki, 1-267.

Malyuto V., Pelt J., Shvelidze T. (1991), An automatic spectrophotometric data reduction system for quantitative spectral classification of stars, Data analysis in astronomy IV. Eds. V. Di Ges`u et al., Plenum press -New York and London, 65-71.

Pavlenko E.,Pelt J. (1991), Synchronization of the components of the magnetic novae V1500 Cygni components, Astrophysics 34, 169-174.

Jetsu L.,Pelt J.,Tuominen I.,Nations H.L (1990), The spot activity of FK Comae Berenices,in The Sun and cool stars: activity, magnetism, dynamos, Proc. of Coll. No.130 of the IAU, Helsinki, Finland, 381-383.

Pelt J. (1990), A method of continuum estimation in spectral classification experiments, Bull. Inf. CDS, No.38, 95-107.

Malyuto V., Pelt J. (1989),Methods for automatic spectral measurements for spectral classification of the F,G,K stars, Bull. Astrophys. Obs. Abastumani., No.66,233-244 ( in Russian ).

Hanni U., Pelt J. (1988), Radial velocity variations in the spectrum of 68 Cygni, Tartu Astrofuus. Obs. Teated, Nr. 98, 200-202

Pavlenko E., Pelt J. (1988) , Slow variability of V1500 Cyg., Inf.Bull. Variable Stars No. 3252, 1-3

Hanni U., Pelt J., Radial-velocity variability in the O star 68 Cygni, Sov. Astron. Lett., Vol. 12, No. 4, 228-230

Hanni U., Pelt J. (1986), Radial velocity variations in the spectrum of the O star 68 Cygni, Pis'ma Astron. Zh, Tom 12, no. 7, 541-545

Malyuto V., Pelt J., Chargeishvili K. (1986), Thechnique and accuracy of automatic measuerements of hydrogen line intensities from objective prism spectra, Tartu Astrofuus. Obs. Teated, Nr. 83, 19-28

Pelt J.(1983), Phase dispersion minimization methods for estimation of periods from unequally spaced sequences of data, ESA Spec. Publ., ESA SP 201, 37-42

Malyuto V., Pelt J. (1982), Further experiments in automatic quantitative spectral classification at Tartu, Bull. Inf. Cent. Donnees Stellaires, No. 23., 29-40

Malyuto V., Pelt J. (1981), Automatic quantitative spectral classification of stars. I. Observational data reduction, Acad. Sci. Estonian SSR, Prepr., No. A-1, 1-15

Pelt J. (1980), Frequency analysis of astronomical time sequences, Valgus Publ., Tallinn, 1-135

Pelt J. (1975), Methods for search of variable star periods, Tartu Astron. Obs. Teated, No. 52, 1-24

viimati muudetud: 08.08.2005

Curriculum Vitae (CV)
1.First Name Jaan
2.Surname Pelt
3.Institution Tartu Observatory
4.Position senior research associate
5.Date of birth 15.03.1947 (day.month.year)
6.Education Tartu State University, M.Sc. in applied mathematics, 1974
7.Research and
professional experience		 1974-1982 Junior Research Associate, Institute of Astrophysics and Atmospheric Physics

1982-1992 Senior Research Associate, Institute of Astrophysics and Atmospheric Physics

1993-present Senior Research Associate, Tartu Observatory
8.Academic degree Cand. Sc. (PhD) in physics and mathematics
9.Dates and sites of
earning the degrees		 Institute of Astrophysics and Atmospheric Physics, 1981
10.Honours/awards
11.Research-administrative
experience		 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)
12.Supervised dissertations

Lauri Jetsu, PhD, 1994, superv. Ilkka Tuominen ja Jaan Pelt. Time dependent phenomena in the photometry of starspots. Helsingi Ülikool
13.Current research program Application of the methods of mathematical statistics in astronomy and astrophysics. Analysis of the variable star and active galactic nuclea light curves. Statistical problems of the gravitational lensing and sunspot distribution. Far and near infrared Fourier transform spectroscopy with advanced sampling techniques. Time dependent spectrometry of the weak signals (with applications in astrophysics and chemistry).
14.Current grant funding
15.List of most important publications

Pelt J. (2005), Estimation of time delays from unresolved photometry, 25 Years After the Discovery: Some Current Topics on Lensed QSOs e-Edited by Luis J. Goicoechea (UC, Spain). On-line at http://grupos.unican.es/glendama/e-Proc.htm, 1-14

Pelt J., Tuominen I., Brooke J.(2005),Century-scale persistence in longitude distribution in the Sun and in silico, Astronomy and Astrophysics, 429(3), pp. 1093-1096.

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, pp. 655-658.

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, 399-414.

Tõnsuaadu K., Borissova M., Bender V., Pelt J.(2004),Thermal Reactions in Synthetic Apatite - Ammonium Sulfate Mixture. Phosphorus, Sulfur, and Silicon and the Related Elements, 179, 2395-2407.

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.

Pelt J. (2003), Astronomical Time Series Analysis, Oulu University, 23 October - 18 November, 1-163

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(2), 505-515.

Brooke, J. M., Pelt, J., Pulkkinen, P., & Tuominen, I.(2002), The Importance of Spatial Information in Sunspot Records. Highlights of Astronomy, Vol 12, 12, 334-337.

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(1), L11-L14.

Pelt J.(2002), Dispersion spectra - from time delays to frequency analysis, in Actes des XXXIVes Journees de Statistique, Bruxelles et Louvain-la-Neuve, 13-17 mai, 121-122.

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(2), L57-L60.

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, 341-342.

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, P. Chossat et al. (eds.), Kluwer Academic Publishers, 331-338.

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(3), 977-981.

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, vol. CS-237,197.

Brooke J.M, Pelt J., Pulkkinen P., Tuominen I.(2000), The importance of spatial information in sunspot records, Applied Historical Astronomy, 24th meeting of the IAU, Joint Discussion 6, August 2000, Manchester, England

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(1), 117-122.

Jetsu, L., & Pelt, J.(2000), Spurious Periods in the Terrestrial Impact Crater Record. Astronomy and Astrophysics, 353(1), 409-418.

Pelt, J., Brooke, J., Pulkkinen, P. J., & Tuominen, I.(2000), A New Interpretation of the Solar Magnetic Cycle. Astronomy and Astrophysics, 362(3), 1143-1150.

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 and Astrophysics, 360(1), 10-14.

You, J., Pelt, J., & Tuominen, I.(2000), Period Analysis for Simultaneous Multichannel Photometric Observations. Astronomy & Astrophysics Supplement Series, 146(3), 397-406.

Jetsu, L., & Pelt, J.(1999), Three Stage Period Analysis and Complementary Methods. Astronomy & Astrophysics Supplement Series, 139(3), 629-643.

Jetsu, L., Pelt, J., & Tuominen, I.(1999), Time Series Analysis of V 1794 Cygni Long-Term Photometry. Astronomy and Astrophysics, 351(1), 212-224.

Pulkkinen, P. J., Brooke, J., Pelt, J., & Tuominen, I.(1999), Long-Term Variation of Sunspot Latitudes. Astronomy and Astrophysics, 341(2), L43-L46.

Brooke, J. M., Pelt, J., Tavakol, R., & Tworkowski, A.(1998), Grand Minima and Equatorial Symmetry Breaking in Axisymmetric Dynamo Models. Astronomy and Astrophysics, 332(1), 339-352.

Pelt, J., Hjorth, J., Refsdal, S., Schild, R., & Stabell, R. (1998). Estimation of Multiple Time Delays in Complex Gravitational Lens Systems. Astronomy and Astrophysics, 337(3), 681-684.

Pelt, J., Schild, R., Refsdal, S., & Stabell, R. (1998). Microlensing on Different Timescales in the Lightcurves of Qso 0957+561 a,B. Astronomy and Astrophysics, 336(3), 829-839.

Duemmler, R., Pelt, J., Korhonen, H., & Iliev, I. (1997). Is Beta Crateris a Sirius-Like System? Astronomy and Astrophysics, 328(2), L37-L39.

Jetsu, L., Pohjolainen, S., Pelt, J., & Tuominen, I. (1997). Is the Longitudinal Distribution of Solar Flares Nonuniform? Astronomy and Astrophysics, 318(1), 293-307.

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, Eds. D. Maoz, A. Sternberg, E.M. Leibowitz, Kluwer Academic Publishers, Dordrecht, 179-182.

Pelt J.(1997), Nonparametric methods for shift and periodicity detection in irregularly measured data, in Time Series Analysis in Astronomy and Meteorology, eds. T. Subba Rao and M.B. Priestley, Chapman & Hall, 249-263.

Jetsu L., Pelt J. (1996), Searching for periodicity in weighted time point series, Astronomy and Astrophysics Supplement, 118, 587-594.

Jetsu L., Pohjolainen S., Pelt J., Tuominen I. (1996), Longitudinal distribution of major solar flares, in Ninth Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, eds. R. Pallavicini, A. Dupree, 1996, ASP Conf. Series, Vol. 109, 135-136.

Pelt J., Kayser R., Refsdal S., Schramm T. (1996), The light curve and time delay of QSO 0957+561, Astronomy and Astrophysics, 305, 97-106.

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.

Pelt J., Hoff W., Kayser R., Refsdal S., Schramm T. (1994), Time delay controversy on QSO 0957+561 A,B not yet decided, Astronomy and Astrophysics, 286, 775-785.

Jetsu L.,Pelt J.,Tuominen I. (1993), Spot and flare activity of FK Comae Berenices: long term photometry, Astronomy and Astrophysics, 278, 449-462.

Jetsu L., Tuominen I., Pelt J. (1993), Time series analysis of FK Comae and LQ Hydrae, ibid, 199-202.

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.

Pelt J. (1993), Nonparametric methods for shift and periodicity detection in irregularly measured data, International Conference on Aplications of Time Series Analysis in Astronomy and Meteorology, Universit`a di Padova, Italy, September 6-10, 149-157.

Schramm K.-J., Borgeest U., Camenzind M., Wagner S.J., Bade N., Dreissigacker O., Heidt J., Hoff W., Kayser R., K\"uhl D., Linde J. v., Linnert M.D., Pelt J., Schramm T. (1993), Vigotti M., Again an active period in the optical light curve of the blazar 3C345: a ''lighthouse effect'' due to helical motion in the jet? Astronomy and Astrophysics 278, 1993, 391-405.

Schramm T., Pelt J., The sampling problem (1993), Proceedings of the 1st MEGAPHOT Workshop, held in Hamburg, 1993 March 30/31, 48-57.

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.

Pelt J. (1992), Irregularly spaced data analysis - User Manual, Helsinki University Press, Helsinki, 1-267.

Malyuto V., Pelt J., Shvelidze T. (1991), An automatic spectrophotometric data reduction system for quantitative spectral classification of stars, Data analysis in astronomy IV. Eds. V. Di Ges`u et al., Plenum press -New York and London, 65-71.

Pavlenko E.,Pelt J. (1991), Synchronization of the components of the magnetic novae V1500 Cygni components, Astrophysics 34, 169-174.

Jetsu L.,Pelt J.,Tuominen I.,Nations H.L (1990), The spot activity of FK Comae Berenices,in The Sun and cool stars: activity, magnetism, dynamos, Proc. of Coll. No.130 of the IAU, Helsinki, Finland, 381-383.

Pelt J. (1990), A method of continuum estimation in spectral classification experiments, Bull. Inf. CDS, No.38, 95-107.

Malyuto V., Pelt J. (1989),Methods for automatic spectral measurements for spectral classification of the F,G,K stars, Bull. Astrophys. Obs. Abastumani., No.66,233-244 ( in Russian ).

Hanni U., Pelt J. (1988), Radial velocity variations in the spectrum of 68 Cygni, Tartu Astrofuus. Obs. Teated, Nr. 98, 200-202

Pavlenko E., Pelt J. (1988) , Slow variability of V1500 Cyg., Inf.Bull. Variable Stars No. 3252, 1-3

Hanni U., Pelt J., Radial-velocity variability in the O star 68 Cygni, Sov. Astron. Lett., Vol. 12, No. 4, 228-230

Hanni U., Pelt J. (1986), Radial velocity variations in the spectrum of the O star 68 Cygni, Pis'ma Astron. Zh, Tom 12, no. 7, 541-545

Malyuto V., Pelt J., Chargeishvili K. (1986), Thechnique and accuracy of automatic measuerements of hydrogen line intensities from objective prism spectra, Tartu Astrofuus. Obs. Teated, Nr. 83, 19-28

Pelt J.(1983), Phase dispersion minimization methods for estimation of periods from unequally spaced sequences of data, ESA Spec. Publ., ESA SP 201, 37-42

Malyuto V., Pelt J. (1982), Further experiments in automatic quantitative spectral classification at Tartu, Bull. Inf. Cent. Donnees Stellaires, No. 23., 29-40

Malyuto V., Pelt J. (1981), Automatic quantitative spectral classification of stars. I. Observational data reduction, Acad. Sci. Estonian SSR, Prepr., No. A-1, 1-15

Pelt J. (1980), Frequency analysis of astronomical time sequences, Valgus Publ., Tallinn, 1-135

Pelt J. (1975), Methods for search of variable star periods, Tartu Astron. Obs. Teated, No. 52, 1-24

last updated: 08.08.2005

[ sulge aken ]