J/ApJS/253/10 12yrs of R-band photometry of the quasar 3C 454.3 (Fan+, 2021)
Optical photometry of the quasar 3C 454.3 during the period 2006-2018 and the
long-term periodicity analysis.
Fan J.H., Kurtanidze S.O., Liu Y., Kurtanidze O.M., Nikolashvili M.G.,
Liu X., Zhang L.X., Cai J.T., Zhu J.T., He S.L., Yang W.X., Yang J.H.,
Gu M.F., Luo G.Y., Yuan Y.H.
<Astrophys. J. Suppl. Ser., 253, 10 (2021)>
=2021ApJS..253...10F 2021ApJS..253...10F
ADC_Keywords: QSOs; Photometry, RI; Photometry, CCD
Keywords: Active galactic nuclei ; CCD photometry ; Quasars
Abstract:
In this work, we present 8523 pairs of R-band optical photometry
observations for the quasar 3C 454.3 made during the period of
2006 October - 2018 February on the 70cm meniscus telescope at
Abastumani Observatory, Georgia, to study its intraday variabilities
(IDVs) and long-term variations, and we have come to the following
results. (1) We detected 10 outbursts, a ΔR=3.825mag variation,
and some IDVs. The IDV timescales are from 4.1 to 285 minutes, with
the corresponding variability amplitude being A=2.9%-43.67%. The
amplitude increases with IDV timescale. (2) The largest variation over
a 1 day timescale is ΔR=1.38mag. (3) The IDV timescales suggest
that the emission sizes are from 8.9x1013cm to 6.20x1015cm, and
the magnetic field strengths are B=0.18-0.79G. (4) Period analysis
results show three possible long-term periods, p=3.04±0.02yr,
p=1.66±0.06yr, and p=1.20±0.03yr in the optical light curve. We
adopted the accretion disk models and the lighthouse models to period
p=3.04±0.02yr: in the accretion disk models, the binary black holes
have masses M=1.17x109M☉; in the lighthouse models, we used
two boosted jet flux densities to fit the observational light curve.
(5) WWZ analysis gives some short-period (high-frequency) signals
associated with strong bursts (JD2454302 and JD2454521) with variable
frequencies and lasting for the entire observation time span (11.3yr).
Description:
All our measurements obtained during the period of 2006 October -
2018 February were made on the 70cm meniscus telescope (f/3) at
Abastumani Observatory, Georgia.
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+155
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 26 8523 The R-band observational data for 3C 454.3
table2.dat 96 41 The intraday variability (IDV) results of FSRQ 3C454.3
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See also:
J/A+AS/127/445 : Gamma-ray loud blazars optical monitoring. II. (Raiteri+ 1998)
J/ApJ/537/101 : Optical Study for blazars. I. (Fan+, 2000)
J/A+A/375/739 : Hard X-ray properties of blazars (Donato+, 2001)
J/ApJS/148/97 : The WMAP First Year Source Catalog (WMAP1) (Bennett+, 2003)
J/A+A/445/441 : SED of BL Lacertae objects (Nieppola+, 2006)
J/A+A/450/39 : BVRI photometry of 8 red blazars (Gu+, 2006)
J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)
J/ApJS/213/26 : Optical light curves of PHL1811 and 3C273 (Fan+, 2014)
J/ApJ/810/14 : Third catalog of LAT-detected AGNs (3LAC) (Ackermann+, 2015)
J/ApJS/226/20 : X-ray, opt. & radio SEDs of Fermi blazars (Fan+, 2016)
J/ApJ/837/45 : 2006-2012 Rc-band & 4.8GHz obs. of AO 0235+164 (Fan+, 2017)
J/ApJS/229/21 : VRI monitoring of the QSO 3C 273 in 2005-2016 (Xiong+, 2017)
J/ApJ/835/L38 : Fermi blazars with Doppler factors (Fan+, 2017)
J/AJ/155/90 : 1996-2009 optical phot. monitoring for 3C 66A (Fan+, 2018)
J/ApJ/866/137 : Bright blazars variability brightness temp. (Liodakis+, 2018)
J/ApJS/235/39 : Jet properties of γ-ray-loud 3FGL AGNs (Chen, 2018)
J/ApJS/248/8 : 9-yr of Fermi-LAT & Swift obs. of 3C 454.3 flares (Das+, 2020)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 F10.5 d JD [0.2/4136.2] Julian Date of observation;
JD-2454028
12- 18 F7.4 mag Rmag [12.63/16.46] R band magnitude
21- 26 F6.4 mag e_Rmag [0/0.04] Uncertainty in Rmag
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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- 9 F9.4 d JD [4301.3/7731.3] Observing time; JD-2450000
11- 17 F7.4 mag m1 [12.34/16.18] Magnitude at the variability
occurring point
19- 25 F7.4 mag m2 [12.51/16.18] Magnitude at the variability
ending point
27- 32 F6.4 mag sigma [0.0013/0.016] Uncertainty of the corresponding
night
34- 36 I3 --- N [2/126] Number of pairs of observations
38- 42 F5.2 --- C1 [2.8/15.6] Variability index, target-comparison
star #1 (1)
44- 48 F5.2 --- C2 [2.6/16] Variability index, target-comparison
star #2 (1)
50- 55 F6.2 --- F1 [10.5/242] F-test value, target-comparison
star #1 (1)
57- 62 F6.2 --- F2 [7.4/245] F-test value, target-comparison star #2
(1)
64- 70 F7.2 --- F99 [1.5/4063] Critical F value for the
corresponding N at 99% level
72- 79 F8.2 --- F99.9 [1.7/20000] Critical F value for the
corresponding N at 99.9% level
81- 85 F5.2 % Amp [2.9/43.7] Variability amplitude
87- 92 F6.2 min Time [2/285] Corresponding time scale
94- 96 A3 --- Var Variability type (2)
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Note (1): For 3C 454.3, there are nine field stars
(http://www.lsw.uni-heidelberg.de/projects/extragalactic/charts/2251+158.html),
for which we chose star D and star H as our comparison stars based on our
observations.
Note (2): Variability as follows:
Y = have a variation;
P = a possible variation;
COM = see comments in the text.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 30-Apr-2021