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J/PAZh/21/652       Optical variability in NGC 7469          (Lyuty+, 1995)
Rapid optical variability in NGC 7469: UBV photometry.
       Lyuty V.M., Doroshenko V.T., Metlov V.G., Irsmambetova T.R.
      <Pis'ma Astron. Zh. 21, 652 (1995)>
      =1995PAZh...21..652L
      =1995AstL...21..581L
ADC_Keywords: Galaxies, Seyfert; Photometry, UBV


Abstract:
    The results of three-color UBV observations of rapid variability in
    the nucleus of the Seyfert galaxy NGC 7469 carried out in 1990-1994
    are presented. The observations have been carried out during 15
    different nights using the 60- and 125-cm telescopes with time
    resolution of 6-8min (50 hours monitoring) with the aperture of 27.5".
    The mean errors of one measurement are 1.8, 1.2 and 1.4% for
    U, B and V.
    The data set length during one night is from 2 up to 5h. The
    different nights show the variations at different level: from weak,
    when the standard deviation during the night exceeds the error of one
    measurement only by 10-20%, up to strong ones, when the standard
    deviation exceeds the error of the measurement by factor two.
Object:
    --------------------------------------
       RA   (2000)   DE      Designation
    --------------------------------------
    23 03 15.6   +08 52 29   NGC 7469
    --------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table.dat         34      395   UBV photometry of NGC 7469


Byte-by-byte Description of file: table.dat

   Bytes Format  Units    Label   Explanations

   1- 12  F12.4  d        HJD     [2448157/2449607] Julian date
  15- 20  F6.3   mag      Umag    U magnitude
  22- 27  F6.3   mag      Bmag    B magnitude
  29- 34  F6.3   mag      Vmag    V magnitude

(End)                                 Veta Avedisova [INASAN]        01-Feb-1999