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J/PAZh/30/243 BV(RI)c-JHK photometry of BL Lac in 1999-2001 (Hagen-Thorn+, 2004)
Optical and infrared monitoring of BL Lac in 1999-2001.
    Hagen-Thorn V.A., Larionov V.M., Larionova E.G., Kudryavtseva N.A.,
    Tikhonov A.V., Hagen-Thorn A.V., Arkharov A.A., Di Paola A., d'Alessio F.
   <Pis'ma Astron. Zh. 30, 243 (2004)>
   =2004PAZh...30..243H
   =2004AstL...30..209H
ADC_Keywords: BL Lac objects; Photometry, CCD ; Photometry, UBVRI ;
              Photometry, infrared

Abstract:
    Results of multicolor observations of BL Lac in 1999-2001 are
    presented. We show that the spectral energy distribution of the
    variable component in the range from K to B had remained unchanged 
    for three years.

Description:
    We performed the optical BVRI observations of BL Lac with a CCD
    photometer of the AI SPbSU equipped with an ST-7 camera attached to
    the 20-cm (1999) and 70-cm (2000-2001) telescopes at the Crimean
    Astrophysical Observatory.

    We carried out the infrared (JHK) observations with the 1.1-m Pulkovo
    Astronomical Observatory (Russian Academy of Sciences) telescope
    installed at the Campo Imperatore Observatory (Italy) and equipped
    with the SWIRCAM camera.
Objects:
    --------------------------------------------------------------------
       RA   (2000)   DE     Designation(s)
    --------------------------------------------------------------------
    22 02 43.3   +42 16 40  BL Lac = IRAS F22006+4202 = RGB J2202+422
    --------------------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        87      275   Photometry in B, V, Rc and Ic bands
table2.dat        58       76   Photometry in J, H and K bands


See also:
 J/A+AS/116/403 : VRI photometry of stars in 12 BL Lac objects (Fiorucci+, 1996)


Byte-by-byte Description of file: table1.dat

   Bytes Format   Units  Label   Explanations

   1- 12  F12.4   d      JDBmag  [2451404/2452212] Date of B-band observation
  15- 19  F5.2    mag    Bmag    B magnitude
  23- 34  F12.4   d      JDVmag  ? [2451404/2452212] Date of V-band observation
  37- 41  F5.2    mag    Vmag    ? V magnitude
  45- 56  F12.4   d     JDRcmag  [2451404/2452212] Date of Rc-band observation
  59- 63  F5.2    mag    Rcmag   Rc magnitude
  67- 78  F12.4   d     JDIcmag  ? [2451404/2452212] Date of Ic-band observation
  81- 85  F5.2    mag    Icmag   ? Ic magnitude


Byte-by-byte Description of file: table2.dat

   Bytes Format   Units   Label        Explanations

   1- 10  F10.2   d       JDJmag       [2451492/2452413] Date of J-band observation
  13- 17  F5.2    mag     Jmag         J magnitude
  21- 30  F10.2   d       JDHmag       ? [2451492/2452413] Date of H-band observation
  34- 38  F5.2    mag     Hmag         ? H magnitude
  42- 51  F10.2   d       JDKmag       ? [2451492/2452413] Date of K-band observation
  54- 58  F5.2    mag     Kmag         ? K magnitude

(End)                  Veta Avedisova (INASAN)                       10-Sep-2004