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Accurate Photometry with Digitized Photographic Plates of the Moscow Collection

Published online by Cambridge University Press:  29 August 2019

K. V. Sokolovsky ,
A. M. Zubareva ,
D. M. Kolesnikova ,
N. N. Samus ,
S. V. Antipin  and
A. A. Belinski
K. V. Sokolovsky
Affiliation:
IAASARS, National Observatory of Athens, Greece Sternberg Astronomical Inst. MSU, Moscow, Russia Astro Space Center, LPI RAS, Moscow, Russia
A. M. Zubareva
Affiliation:
Sternberg Astronomical Inst. MSU, Moscow, Russia Institute of Astronomy RAS, Moscow, Russia
D. M. Kolesnikova
Affiliation:
Institute of Astronomy RAS, Moscow, Russia
N. N. Samus
Affiliation:
Sternberg Astronomical Inst. MSU, Moscow, Russia Institute of Astronomy RAS, Moscow, Russia
S. V. Antipin
Affiliation:
Sternberg Astronomical Inst. MSU, Moscow, Russia
A. A. Belinski
Affiliation:
Sternberg Astronomical Inst. MSU, Moscow, Russia
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Abstract

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Photographic plate archives contain a wealth of information about the positions and brightness of celestial objects decades ago. Plate digitization is necessary to make this information accessible, but extracting it is a technical challenge. We have developed algorithms to extract photometry with an accuracy of better than ∼0.1 mag. in the range 13 < B < 17 mag from photographic images obtained in 1948–1996 with the 40-cm Sternberg Institute astrograph (30 × 30 cm plate size, 10 × 10 deg field of view) and digitized using a flatbed scanner. The extracted photographic light-curves are used to identify thousands of new high-amplitude variable stars (>0.2 mag). The algorithms are implemented in the free software VaST available at http://scan.sai.msu.ru/vast/

Keywords

Techniques: photometricstars: variables: other
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S339: Southern Horizons in Time-Domain Astronomy , November 2017 , pp. 340 - 343
Copyright
© International Astronomical Union 2019 

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