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J/AZh/78/408    Variability of Cyg X-1 in 1994-1998          (Karitskaya+, 2001)

Coordinated observations of Cyg X-1 (V1357) from 1994-1998 in the Commonwealth of Independent States. Karitskaya E.A., Voloshina I.B., Goransky V.P., Grankin K.N., Dzhaniashvili I.B, Ezhkova O.V., Kochiashvili N.T., Kumsiashvili M.I., Kusakin A.V., Lyutyi V.M., Mel'Nikov S.Yu., Metlova N.V. <Astron. Zh. 78, 408 (2001)> =2001AZh....78..408K =2001ARep...45..350K
ADC_Keywords: Binaries, X-ray; Photometry, UBVRI Abstract: Photoelectric UBVR photometry of Cyg X-1 obtained during the coordinated international campaign 'Optical Monitoring of Unique Astrophysical objects', carried out in observatories of CIS countries (Georgia, Kazakhstan, Russia, Uzbekistanin and Ukraine) 1994-1998 is presented. The data are presented as a single set, taking into account systematic differences between individual data sets. In total 2258 UBVR observations were obtained during 407 nights. Object: ----------------------------------------------------------- RA (2000) DE Designation ----------------------------------------------------------- 19 58 21.6 +35 12 05 Cyg X-1 = V1357 Cyg = HD 226868 ----------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table.dat 75 510 Photoelectric observations of Cyg X-1
See also: J/PAZh/26/27 : Variability of Cyg X-1 (V1357) in 1995-1996 (Karitskaya+, 2000) Byte-by-byte Description of file: table.dat
Bytes Format Units Label Explanations
1- 12 F12.4 d HJD [2449559/2451178] Julian date 15- 19 F5.3 mag Umag ? U magnitude 22- 26 F5.3 mag e_Umag ? Uncertainty in U magnitude 29- 33 F5.3 mag Bmag ? B magnitude 36- 40 F5.3 mag e_Bmag ? Uncertainty in B magnitude 43- 47 F5.3 mag Vmag V magnitude 50- 54 F5.3 mag e_Vmag Uncertainty in V magnitude 57- 61 F5.3 mag Rmag ? R magnitude 64- 68 F5.3 mag e_Rmag ? Uncertainty in R magnitude 71- 72 I2 --- Nnight Number of each night observations 74- 75 A2 --- Rem Observer code (1)
Note (1): ja: E.B. Dzhaniashvili (Abastumani, Georgia) lu: V.M. Lyuty and N.V. Metlova (SAI, Crimean Station, Ukraine) mz: M.I. Kumsiashvili and N. Kochiachvili (Abastumani, Georgia) sh: V.P. Goranskij, E.A. Karitskaya, A.V. Kusakin (SAI, Moscow Russia; Institute of Astronomy (RAS), Zvenigorod, Russia; SAI, Crimean Station; Crimean astrophysical observatory, Ukraine) ts: V.P. Goranskij, E.A. Karitskaya (Tien-Shan observatory, Kazakhstan) uz: K.N. Grankin, O.V. Ezhkova, S.Yu. Melnikov (Majdanak observatory, Uzbekistan) vo: I.B. Voloshina (SAI, Crimean Station, Ukraine)

(End) Veta Avedisova [INASAN] 25-Aug-2001
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