J/other/PZ/28.7 Cyg X-1 JK light curves (Taranova+, 2008)
The infrared variations of Cyg X-1 (V1357 Cyg), 1995-2007.
Taranova O.G., Shenavrin V.I., Nadjip A.E.
<Perem. Zvezdy, 28, 7 (2008)>
=2008PZ.....28....7T 2008PZ.....28....7T
ADC_Keywords: Binaries, X-ray ; Photometry, infrared
Abstract:
We present the results of our long-term (13 years) J and K photometry
of the X-ray binary Cyg X-1. The object's JK variability amplitudes
were less than 0.2mag. The J and K orbital light curves are appreciably
asymmetric in quadratures. The secondary minimum is deeper, in
comparison to the primary, and it is probable that the star becomes
hotter at secondary minima.
Description:
Our JK photometry of Cyg X-1 was performed at the 1.25-m telescope of
the Crimean Laboratory of the Sternberg Astronomical Institute using a
photometer with a liquid-nitrogen-cooled InSb detector. The photometer
was mounted at the Cassegrain focus of the telescope; the exit
aperture was ∼12". Observations were made between June, 1995 and
September, 2007.
Objects:
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RA (2000) DE Designation(s)
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19 58 21.68 +35 12 05.8 Cyg X-1 = V* V1357 Cyg
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 35 99 The JK photometry of V1357 Cyg (Cyg X-1), 1995-2007
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See also:
J/PAZh/26/27 : Variability of Cyg X-1 (V1357) in 1995-1996 (Karitskaya+, 2000)
J/AZh/78/408 : Variability of Cyg X-1 in 1994-1998 (Karitskaya+, 2001)
J/A+A/447/245 : Cyg X-1 Spectral Evolution 1999-2004 (Wilms+, 2006)
J/AZh/85/409 : V1357 Cyg spectroscopic monitoring, 2002-04 (Karitskaya+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 F11.3 d JD Julian date
13- 17 F5.3 mag Jmag ? J magnitude
19- 23 F5.3 mag e_Jmag ? rms uncertainty on Jmag
25- 29 F5.3 mag Kmag ? K magnitude
31- 35 F5.3 mag e_Kmag ? rms uncertainty on Kmag
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 07-May-2012