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J/A+AS/129/569      BVRI photometry of OJ 287 (Jia Guibin+ 1998)

Microvariability of the blazar OJ 287 Jia Guibin, Cen Xuefen, Ma Huiyu, Wang Jiancheng <Astron. Astrophys. Suppl. Ser. 129, 569 (1998)> =1998A&AS..129..569J (SIMBAD/NED BibCode)
ADC_Keywords: BL Lac objects ; Photometry, UBVRI ; Photometry, CCD Keywords: BL Lacertae objects: individual (OJ 287) - galaxies: active Abstract: Results of BVRI CCD photometric monitoring and fast photometry in the I band for the blazar OJ 287 in 1994-1995 are presented. The predicted outburst of the blazar had been observed, the maximum appeared in 1994 November, after that, the luminosity decreased by 1.6mag for about three months and dropped to near the level in 1994 April. Rapid variations with timescales of minutes, hours and one day were observed in our observations, with small amplitude. The amplitude of the most rapid variations (minutes) is in the range of 0.043-0.12mag . The results of the statistical analysis of the fast photometry data are as follows. In five nights out of six rapid variability appeared in the sampling interval, which ranged from 3.4 minutes to 6.5 minutes, with a rms amplitude of flux variations of 1.70%-2.3%. The rapid variability can be explained by the model of shocks within turbulent jet or of vortices and magnetic flux tubes on accretion disk. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 08 54 48.9 +20 06 31 OJ 287 = QSO 0851+202 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table5.dat 35 155 Results for OJ 287
See also: J/A+AS/128/315 : BVRI photometry of blazars (JiaGuibin+ 1998) Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 8 A8 "DD/MM/YY" Date Observation date 10- 20 F11.3 d JD Julian date 22 A1 --- Band [BVRI] The observed waveband 24- 28 F5.2 mag mag Magnitude (BVRI) in the band 30- 33 F4.2 mag e_mag Error on mag
Acknowledgements: Jiancheng Wang
(End) Patricia Bauer [CDS] 09-Dec-1997
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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