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 2004PAZh...30..243H
=2004AstL...30..209H 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:
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RA (2000) DE Designation(s)
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22 02 43.3 +42 16 40 BL Lac = IRAS F22006+4202 = RGB J2202+422
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File Summary:
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FileName Lrecl Records Explanations
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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
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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
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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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
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(End) Veta Avedisova (INASAN) 10-Sep-2004