J/ApJ/764/5 BR photometry of 2012 precursor flare in OJ287 (Pihajoki+, 2013)
Precursor flares in OJ 287.
Pihajoki P., Valtonen M., Zola S., Liakos A., Drozdz M., Winiarski M.,
Ogloza W., Koziel-Wierzbowska D., Provencal J., Nilsson K., Berdyugin A.,
Lindfors E., Reinthal R., Sillanpaa A., Takalo L., Santangelo M.M.M.,
Salo H., Chandra S., Ganesh S., Baliyan K.S., Coggins-Hill S.A.,
Gopakumar A.
<Astrophys. J., 764, 5 (2013)>
=2013ApJ...764....5P 2013ApJ...764....5P
ADC_Keywords: BL Lac objects ; Photometry, UBVRI ; QSOs ; Stars, flare
Keywords: BL Lacertae objects: individual: OJ 287;
quasars: individual: OJ 287
Abstract:
We have studied three most recent precursor flares in the light curve
of the blazar OJ 287 while invoking the presence of a precessing
binary black hole in the system to explain the nature of these flares.
Precursor flare timings from the historical light curves are compared
with theoretical predictions from our model that incorporate effects
of an accretion disk and post-Newtonian description for the binary
black hole orbit. We find that the precursor flares coincide with the
secondary black hole descending toward the accretion disk of the
primary black hole from the observed side, with a mean z-component of
approximately zc=4000AU. We use this model of precursor flares to
predict that precursor flare of similar nature should happen around
2020.96 before the next major outburst in 2022.
Description:
In addition to the previously published light curve (Valtonen et al.
2009ApJ...698..781V 2009ApJ...698..781V), we have added new data points up to the most
recent precursor flare. These observations have been made at Tuorla
Observatory in Finland (hereafter labeled TUO), Astronomical
Observatory of Capannori in Italy (OAC), Astronomical Observatory of
the Jagiellonian University (KRK) and the Mount Suhora Observatory of
the Pedagogical University (SUH) in Poland, University of Athens (ATH)
in Greece, Mount Cuba Observatory (MTC) in USA, Mount Abu Infrared
Observatory (MIRO) in India, and Liverpool Telescope (LIV) and
Kungliga Vetenskapliga Akademien Telescope (KVA) situated at
Observatorio del Roque de Los Muchachos in La Palma, Canary Islands,
Spain. They have been carried out in R, B, and V bands, converted to V
magnitudes and then to V-band fluxes (for details, see, e.g., Valtonen
et al. 2008Natur.452..851V 2008Natur.452..851V).
Objects:
------------------------------------------------------
RA (ICRS) DE Designation(s)
------------------------------------------------------
08 54 48.87 +20 06 30.6 OJ 287 = QSO J0854+2006
------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 33 1945 Observations of the 2012 precursor flare
--------------------------------------------------------------------------------
See also:
J/A+A/562/A79 : Variability of 7 blazars in six bands (Sandrinelli+, 2014)
J/A+A/559/A20 : Historical outbursts of OJ287 (Hudec+, 2013)
J/MNRAS/435/1300 : Intranight optical variability of AGN (Goyal+, 2013)
J/MNRAS/421/1861 : OJ287 polarization and VLBI jet direction (Valtonen+, 2012)
J/ApJ/747/63 : 7mm VLBA observations of BL Lac object OJ287 (Agudo+, 2012)
J/ApJ/731/118 : R-band variability in blazar S5 0716+71 (Chandra+, 2011)
J/AJ/141/65 : BATC ceimo light curves of OJ 287 (Dai+, 2011)
J/ApJS/194/19 : Optical linear polarization at McDonald Obs. (Wills+, 2011)
J/A+A/520/A62 : Radio-optical scrutiny of compact AGN (Arshakian+, 2010)
J/MNRAS/402/2087 : Opt. polarization of OJ 287 in 2005-2009 (Villforth+, 2010)
J/AJ/138/845 : BVRI observations of 235 bright quasars (Ojha+, 2009)
J/AJ/137/4186 : UBVRI standards around celestial equator (Landolt, 2009)
J/ApJS/180/67 : Phot. selection of QSOs from SDSS. II. (Richards+, 2009)
J/MNRAS/385/823 : UBVRI light curves of OJ 287 (Zheng+, 2008)
J/PASJ/60/161 : Multi-wave band emission from blazars (Yi+, 2008)
J/A+A/488/867 : Synchrotron peak frequency of 135 AGN (Nieppola+, 2008)
J/AJ/134/799 : Multiwaveband polarimetry of 15 AGN (Jorstad+, 2007)
J/AJ/132/1256 : eim BATC photometry of OJ 287 (Wu+, 2006)
J/A+A/450/39 : BVRI photometry of 8 red blazars (Gu+, 2006)
J/A+A/445/441 : SED of BL Lacertae objects (Nieppola+, 2006)
J/AJ/130/873 : Properties of BQS objects in the SDSS DR3 (Jester+, 2005)
J/AJ/122/2055 : UBVRIJHK phot. of AGN field stars (Gonzalez-Perez+, 2001)
J/ApJ/537/101 : Optical Study for blazars. I. (Fan+, 2000)
J/ApJ/522/846 : Optical monitoring of GeV loud blazars (Xie+, 1999)
J/A+AS/136/455 : BVRI photometry of 3 BL Lac objects (Bai+, 1999)
J/A+AS/132/83 : BVRI photometry of 7 BL Lac objects (Bai+ 1998)
J/A+AS/129/569 : BVRI photometry of OJ 287 (Jia Guibin+ 1998)
J/A+AS/116/403 : VRI phot. of stars in 12 BL Lac objects (Fiorucci+, 1996)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 F13.7 d MJD Modified Julian Date of observation
15- 18 A4 --- Obs Facility used in observation (1)
20 A1 --- Band [BR] Passband used in photometry (B or R)
22- 27 F6.3 mag mag [13.4/16.4] Observed magnitude in Band
29- 33 F5.3 mag e_mag [0.003/0.06] Error in mag
--------------------------------------------------------------------------------
Note (1): Facility as follows:
TUO = Tuorla Observatory in Finland;
OAC = Astronomical Observatory of Capannori in Italy;
KRK = Astronomical Observatory of the Jagiellonian University in Poland;
SUH = Mt. Suhora Observatory of the Pedagogical University in Poland;
ATH = University of Athens in Greece;
MTC = Mt. Cuba Observatory in USA;
MIRO = Mt. Abu Infrared Observatory in India;
LIV = Liverpool Telescope in La Palma, Canary Islands, Spain;
KVA = Kungliga Vetenskapliga Akademien Telescope in La Palma, Canary
Islands, Spain.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 22-Oct-2014