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J/AZh/79/1087         UBV photometry of X-ray binary HZ Her  (Sheffer+, 2002)

Optical features of the accretion disk in the HZ Her/Her X-1 system during the anomalous low state in 1999. Sheffer E.K., Voloshina I.B., Goransky V.P., Lyuty V.M. <Astron. Zh., 79, 1087 (2002)> =2002AZh....79.1087S =2002ARep...46..981S
ADC_Keywords: Binaries, X-ray; Photometry Abstract: We present UBV photoelectric and CCD observations of HZ Her/Her X-1 system near its primary minimum in 1999, when the object was in anomalous low X-ray state, together with UBV observations accumulated since 1988. Description: We began our observations in April 1999 with the CCD photometer of the Sternberg Astronomical Institute's Crimean Laboratory, at the Newtonian focus of the 125cm telescope (relative aperture 1/4). In July, we continued observations with the CCD photometer in the B and V bands using the 60cm telescope. In August, we used the 60cm telescope with the UBV photometer and an EMI 9789 photomultiplier as a detector. Objects: ------------------------------------------------------------------------- RA (2000) DE Designation(s) ------------------------------------------------------------------------- 16 57 49.83 +35 20 32.6 HZ Her = 1RXS J165749.6+352022 = AN 142.1936 ------------------------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 56 112 1999 observations of HZ Her near the primary minimum table2.dat 32 239 UBV observations of HZ Her after 1988
See also: J/A+A/342/736 : Pre-eclipse dip of Her X-1 (Stelzer+ 1999) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 12 F12.4 d JD [2451282/2451407] Julian date 15- 20 F6.4 --- Phase Orbital phase (Period=1.7day) 23- 27 F5.3 --- psi35 Phase of 35-day cycle 30- 35 F6.3 mag Vmag ? V magnitude 38- 43 F6.3 mag Bmag B magnitude 46- 51 F6.3 mag Umag ? U magnitude 54- 56 A3 --- Rem [Phe CCD] Instrument used: Phe: UBV photometer CCD: CCD photometer
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 11 F11.3 d JD [2447386/2451489] Julian date 14- 18 F5.2 mag Vmag V magnitude 21- 25 F5.2 mag Bmag B magnitude 28- 32 F5.2 mag Umag U magnitude

(End) Veta Avedisova (INASAN) 01-Apr-2003
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