J/ApJ/856/80 6-yr optical monitoring of the FSRQ 3C 454.3 (Fan+, 2018)
Optical and gamma-ray variability behaviors of 3C 454.3 from 2006 to 2011.
Fan X.-L., Li S.-K., Liao N.-H., Chen L., Liu H.-T., Lu K.-X., Yan D.-H.,
Zhang R.-Y., Guo Q., Wu Q., Bai J.-M.
<Astrophys. J., 856, 80 (2018)>
=2018ApJ...856...80F 2018ApJ...856...80F
ADC_Keywords: Photometry, UBVRI; QSOs
Keywords: galaxies: jets ; quasars: individual (3C 454.3)
Abstract:
We present our photometric monitoring of a flat spectrum radio quasar
3C 454.3 at Yunnan observatories from 2006 to 2011. We find that the
optical color of 3C 454.3 shows an obvious redder-when-brighter trend,
which reaches a saturation stage when the source is brighter than
15.15mag at V band. We perform a simulation with multiple values of
disk luminosity and spectral index to reproduce the magnitude-color
diagram. The results show that the contamination caused by the disk
radiation alone is difficult to produce the observed color
variability. The variability properties during the outburst in 2009
December are also compared with γ-ray data derived from the
Fermi γ-ray space telescope. The flux variation of these two
bands follows a linear relation with Fγ∝FR1.14±0.07,
which provides observational evidence for the external Compton process
in 3C 454.3. Meanwhile, this flux correlation indicates that electron
injection is the main mechanism for the variability origin. We also
explore the variation of the flux ratio Fγ/FR and the detailed
structures in the light curves, and discuss some possible origins for
the detailed variability behaviors.
Description:
Our photometric monitoring of 3C 454.3 was performed with the Lijiang
2.4m telescope and the Kunming 1m telescope at Yunnan observatories
from 2006 September to 2011 November.
Objects:
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RA (ICRS) DE Designation(s)
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22 53 57.75 +16 08 53.6 3C 454.3 = QSO B2251+158
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 28 360 The daily averaged magnitude of 3C 454.3 observed
at Yunnan Observatories
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See also:
J/A+A/333/231 : O-M stars model atmospheres (Bessell+ 1998)
J/A+A/450/39 : BVRI photometry of 8 red blazars (Gu+, 2006)
J/ApJ/763/L36 : MgII and FeII flux of the blazar 3C 454.3 (Leon-Tavares+, 2013)
J/ApJ/783/83 : BVRI photometry of S5 0716+714 (Liao+, 2014)
J/ApJS/226/17 : BRI observations of the QSO Zw III 2 (Liao+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 F9.3 d MJD [53999.5/55881.6] Modified Julian date of
observation; JD-2400000.5
11- 16 F6.3 mag omag [13.1/17.2] Observed magnitude
18- 22 F5.3 mag e_omag [0.001/0.15] Uncertainty in omag
24- 24 A1 --- Filt [BVRI] Filter (B, V, R or I)
26- 28 A3 --- Instr Instrument (1)
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Note (1): Instrument used as follows:
1m = Kunming 1m telescope;
2m4 = Lijiang 2.4m telescope.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 13-Feb-2019