J/AJ/121/90 Microvariability of BL Lacertae (Clements+, 2001)
Multiband microvariability observations of BL Lacertae during the outburst
of 1997.
Clements S.D., Carini M.T.
<Astron. J., 121, 90-96 (2001)>
=2001AJ....121...90C 2001AJ....121...90C (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, photometry
Keywords: BL Lacertae objects: general -- BL Lacertae objects: individual
(BL Lacertae) -- galaxies: photometry
Abstract:
BL Lac was observed in the V and R bands on 11 nights in 1997 July
during a major optical outburst. It varied continuously, exhibiting
nightly variations ranging from 0.1 to 0.6mag. Over the course of the
11 nights, BL Lac was seen to vary by 1.8 R magnitudes. Color
variations were also observed, with BL Lac becoming bluer as it
brightened. The influence of variable seeing conditions on the
observed variations was investigated. No correlation was found between
the observed microvariability and the local seeing conditions.
Objects:
-----------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------
22 02 43.29 +42 16 40.0 BL Lacertae
-----------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table4.dat 45 147 V mag of BL Lac, the comparison star,
and the check stars as a function of time
table5.dat 45 152 R mag of BL Lac, the comparison star,
and the check stars as a function of time
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 d Obs.D Observation day in 1997 (UT)
12- 17 F6.3 mag Vmag V-band magnitude of BL Lac
19- 24 F6.3 mag V1mag V-band magnitude of Comparison star 1 (1)
26- 31 F6.3 mag V2mag V-band magnitude of Comparison star 2 (1)
33- 38 F6.3 mag V3mag V-band magnitude of Comparison star 3 (1)
40- 45 F6.3 mag V4mag V-band magnitude of Comparison star 4 (1)
--------------------------------------------------------------------------------
Note (1): Table 1 lists the designations used in the paper along with the
Smith et al. 1985 (1985AJ.....90.1184S 1985AJ.....90.1184S) designations.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 d Obs.D Observation day in 1997 (UT)
12- 17 F6.3 mag Rmag Cousins R magnitude of BL Lac
19- 24 F6.3 mag R1mag Cousins R magnitude of Comparison star 1 (1)
26- 31 F6.3 mag R2mag Cousins R magnitude of Comparison star 2 (1)
33- 38 F6.3 mag R3mag Cousins R magnitude of Comparison star 3 (1)
40- 45 F6.3 mag R4mag Cousins R magnitude of Comparison star 4 (1)
--------------------------------------------------------------------------------
Note (1): Table 1 lists the designations used in the paper along with the
Smith et al. 1985 (1985AJ.....90.1184S 1985AJ.....90.1184S) designations.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Laurent Cambresy [CDS] 13-Jul-2004