J/ApJ/731/118 R-band variability in blazar S5 0716+71 (Chandra+, 2011)
Rapid optical variability in blazar S5 0716+71 during 2010 March.
Chandra S., Baliyan K.S., Ganesh S., Joshi U.C.
<Astrophys. J., 731, 118 (2011)>
=2011ApJ...731..118C 2011ApJ...731..118C
ADC_Keywords: BL Lac objects ; Photometry, RI
Keywords: BL Lacertae objects: individual (S5 0716+71) - galaxies: active -
galaxies: photometry - methods: observational
Abstract:
We report rapid optical variability for the blazar S5 0716+71 during
2010 March 8-10 and 19-20 in the CCD observations made from Mt. Abu
Infrared Observatory. The light curves are constructed for a duration
longer than 3hr each night, with very high temporal resolution (∼45s
in the R band). During 2010 March 8, the source smoothly decayed by
about 0.15mag in 2.88hr, apart from a fast flicker lasting about 30
minutes. S5 0716+71 brightened during March 9 and 10, showing high
activity, while it was relatively faint (>14mag in the R band) albeit
variable during March 19-20. During March 9 and 10, rapid flickers in
the intensity modulated the long-term intra-night (∼3hr) variations.
The present observations suggest that the blazar S5 0716+71 showed
night-to-night and intra-night variability at various timescales with
a 100% duty cycle for variation along with microvariability at
significant levels. On a night-to-night basis, the source exhibits
mild bluer-when-brighter nature. The interaction of shocks with local
inhomogeneities in the jet appears to cause intra-night variations,
while microvariations could be due to small-scale perturbations
intrinsic to the jet.
Description:
The photometric observations were carried out by using the CCD Camera
of the 1.2m Telescope at Mt. Abu Infrared Observatory, India, in
Johnson-Cousins R filter. The source was observed in two observing
slots: during 2010 March 8-10 and 2010 March 19-20.
Objects:
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RA (2000) DE Designation(s)
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07 21 53.45 +71 20 36.4 S5 0716+71 = QSO B0716+714
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 36 1034 R-band photometric data for S5 0716+71
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See also:
VII/258 : Quasars and Active Galactic Nuclei (13th Ed.) (Veron+ 2010)
J/ApJS/189/1 : A 3.5mm polarimetric survey of radio-loud AGNs (Agudo+, 2010)
J/ApJ/722/L7 : Fermi/LAT detected MOJAVE AGNs (Pushkarev+, 2010)
J/ApJ/710/764 : Extended radio emission in MOJAVE blazars (Kharb+, 2010)
J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)
J/ApJS/175/97 : CGRaBS: γ-ray blazar candidates (Healey+, 2008)
J/A+A/466/63 : VLBI observations of BL Lac objects (Wu+, 2007)
J/A+A/445/441 : SED of BL Lacertae objects (Nieppola+, 2006)
J/ApJS/136/265 : Monitoring compact radio sources at 2.5+8.2GHz (Lazio+, 2001)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 "YYYY/MMM/DD" Date Date of the observation
13- 23 F11.5 d MJD Modified Julian Date
25- 30 F6.3 mag Rmag Counsins R band magnitude
32- 36 F5.3 mag e_Rmag The 1σ uncertainty in Rmag
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 24-Oct-2012