J/A+A/366/100 UBV photometry of V Sagittae (Simon+, 2001)
Long-term color variations of the peculiar X-ray binary V Sagittae.
Simon V., Shugarov S., Marsakova V.I.
<Astron. Astrophys. 366, 100 (2001)>
=2001A&A...366..100S 2001A&A...366..100S
ADC_Keywords: Binaries, X-ray - Photometry, UBV
Keywords: stars: activity - binaries: general - circumstellar matter -
novae, cataclysmic variables - stars: individual: V Sge
Description:
UBV photoelectric observations of the X-ray binary V Sge during high,
medium and low state of its photometric activity over the years 1995 -
1997. Typical exposure time was 10 seconds. The orbital phases and
epochs were calculated according to the quadratic ephemeris of J. Smak
(equation 2; 1995AcA....45..355S 1995AcA....45..355S).
Objects:
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RA (2000) DE Designation(s)
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20 20 14.7 +21 06 09 V Sge
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 78 367 UBV observations and the color indices U-B, B-V
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian Date
14- 19 F6.3 mag Vmag ? Brightness in the V-band (mag(V))
21- 24 F4.2 mag e_Vmag ? Standard deviation of mag(V)
26- 31 F6.3 mag Bmag ? Brightness in the B-band (mag(B))
33- 36 F4.2 mag e_Bmag ? Standard deviation of mag(B)
38- 43 F6.3 mag Umag ? Brightness in the U-band (mag(U))
45- 48 F4.2 mag e_Umag ? Standard deviation of mag(U)
50- 56 F7.5 --- Phase [0,1[ Orbital phase
58- 64 I7 d Epoch Epoch of observation (HJD)
66- 71 F6.3 mag U-B ? Color index U-B
73- 78 F6.3 mag B-V ? Color index B-V
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Acknowledgements: Vojtech Simon
(End) Patricia Bauer [CDS] 18-Jan-2001