ADC/CDS Standard Document for Catalog:
/journal_tables/A+AS/129/569/

1. Use the ADC Data Viewer Suite to visualize the data.
2. Get the data files via anonymous FTP. (See Note.)

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 <jcwang@public.km.yn.cn>
================================================================================
(End)                                         Patricia Bauer [CDS]   09-Dec-1997