J/ApJ/741/30 Radio/γ-ray correlation in AGN (Ackermann+, 2011)
The radio/gamma-ray connection in active galactic nuclei in the era of the
Fermi Large Area Telescope.
Ackermann M., Ajello M., Allafort A., Angelakis E., Axelsson M.,
Baldini L., Ballet J., Barbiellini G., Bastieri D., Bellazzini R.,
Berenji B., Blandford R.D., Bloom E.D., Bonamente E., Borgland A.W.,
Bouvier A., Bregeon J., Brez A., Brigida M., Bruel P., Buehler R.,
Buson S., Caliandro G.A., Cameron R.A., Cannon A., Caraveo P.A.,
Casandjian J.M., Cavazzuti E., Cecchi C., Charles E., Chekhtman A.,
Cheung C.C., Ciprini S., Claus R., Cohen-Tanugi J., Cutini S., de Palma F.,
Dermer C.D., do Couto e Silva E., Drell P.S., Dubois R., Dumora D.,
Escande L., Favuzzi C., Fegan S.J., Focke W.B., Fortin P., Frailis M.,
Fuhrmann L., Fukazawa Y., Fusco P., Gargano F., Gasparrini D., Gehrels N.,
Giglietto N., Giommi P., Giordano F., Giroletti M., Glanzman T.,
Godfrey G., Grandi P., Grenier I.A., Guiriec S., Hadasch D., Hayashida M.,
Hays E., Healey S.E., Johannesson G., Johnson A.S., Kamae T., Katagiri H.,
Kataoka J., Knodlseder J., Kuss M., Lande J., Lee S.-H., Longo F.,
Loparco F., Lott B., Lovellette M.N., Lubrano P., Makeev A.,
Max-Moerbeck W., Mazziotta M.N., McEnery J.E., Mehault J., Michelson P.F.,
Mizuno T., Monte C., Monzani M.E., Morselli A., Moskalenko I.V., Murgia S.,
Naumann-Godo M., Nishino S., Nolan P.L., Norris J.P., Nuss E., Ohsugi T.,
Okumura A., Omodei N., Orlando E., Ormes J.F., Ozaki M., Paneque D.,
Pavlidou V., Pelassa V., Pepe M., Pesce-Rollins M., Pierbattista M.,
Piron F., Porter T.A., Raino S., Razzano M., Readhead A., Reimer A.,
Reimer O., Richards J.L., Romani R.W., Sadrozinski H.F.-W., Scargle J.D.,
Sgro C., Siskind E.J., Smith P.D., Spandre G., Spinelli P., Strickman M.S.,
Suson D.J., Takahashi H., Tanaka T., Taylor G.B., Thayer J.G., Thayer J.B.,
Thompson D.J., Torres D.F., Tosti G., Tramacere A., Troja E.,
Vandenbroucke J., Vianello G., Vitale V., Waite A.P., Wang P., Winer B.L.,
Wood K.S., Yang Z., Ziegler M.
<Astrophys. J., 741, 30 (2011)>
=2011ApJ...741...30A 2011ApJ...741...30A
ADC_Keywords: Active gal. nuclei ; Radio continuum ; Gamma rays ; Redshifts ;
BL Lac objects ; Cross identifications
Keywords: BL Lacertae objects: general - galaxies: active - galaxies: jets -
gamma rays: galaxies - radio continuum: galaxies - quasars: general
Abstract:
We present a detailed statistical analysis of the correlation between
radio and gamma-ray emission of the active galactic nuclei (AGNs)
detected by Fermi during its first year of operation, with the largest
data sets ever used for this purpose. We use both archival
interferometric 8.4GHz data (from the Very Large Array and ATCA, for
the full sample of 599 sources) and concurrent single-dish 15GHz
measurements from the Owens Valley Radio Observatory (OVRO, for a sub
sample of 199 objects). Our unprecedentedly large sample permits us to
assess with high accuracy the statistical significance of the
correlation, using a surrogate data method designed to simultaneously
account for common-distance bias and the effect of a limited dynamical
range in the observed quantities.
Description:
The gamma-ray sources in the present paper are a subset of those in
the First Fermi-LAT catalog (1FGL; Abdo et al. 2010, Cat. J/ApJS/188/405).
The 1FGL is a catalog of high-energy gamma-ray sources detected by the
LAT during the first 11 months of the science phase of Fermi, i.e.,
between 2008 August 4 and 2009 July 4.
In Table 1, we list the radio flux densities used for the present
work, along with some basic information on the sources (position,
optical and spectral type, redshift). In particular, we give the
archival 8GHz interferometric flux density (with the corresponding
reference) and the 15GHz single-dish flux density, when available.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 114 599 Source list and radio data
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See also:
VIII/72 : CLASS survey of radio sources (Myers+, 2003)
J/ApJS/199/31 : Fermi LAT second source catalog (2FGL) (Nolan+, 2012)
J/A+A/535/A69 : AGN Fermi/LAT γ-ray and 37GHz fluxes (Nieppola+, 2011)
J/ApJ/726/16 : γ-ray loud blazars (Linford+, 2011)
J/ApJS/194/29 : Observations of blazars at 15GHz (Richards+, 2011)
J/ApJ/722/L7 : Fermi/LAT detected MOJAVE AGNs (Pushkarev+, 2010)
J/ApJ/722/520 : Gamma-ray light curves of Fermi blazars (Abdo+, 2010)
J/ApJ/718/587 : The Fermi-AT20G catalog (Mahony+, 2010)
J/ApJ/715/429 : First Fermi-LAT AGN catalog (1LAC) (Abdo+, 2010)
J/ApJ/709/1407 : SED of the Fermi blazars (Li+, 2010)
J/ApJS/175/97 : CGRaBS: survey of γ-ray blazar (Healey+, 2008)
J/ApJS/171/61 : All-Sky Survey of Flat-Spectrum Radio Sources (Healey+, 2007)
J/PASJ/55/351 : ATCA observations of 202 compact radio sources (Tingay+, 2003)
J/A+AS/122/235 : ROSAT active galaxies IDs (Laurent-Muehleisen+ 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [1FGL]
5- 16 A12 --- 1FGL the 1FGL name (JHHMM.m+DDMM)
18- 40 A23 --- OName Other name
42- 50 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000)
52- 60 F9.5 deg DEdeg Declination in decimal degrees (J2000)
62- 65 A4 --- OType Optical type (AGN, BLL or FSRQ) (1)
67- 69 A3 --- SType SED type (HSP, ISP or LSP) (2)
71- 75 F5.3 --- z ? Redshift (3)
77- 83 F7.1 mJy S8 Archival 8GHz interferometric flux density
85- 87 A3 --- r_S8 Reference for S8 (4)
89- 96 F8.2 mJy S15m ? Single dish 1 year mean 15GHz flux density
98-105 F8.2 mJy S15p ? Single dish 1 year peak 15GHz flux density
107-114 F8.2 mJy S15nc ? Single dish non concurrent flux density (5)
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Note (1): The optical data reported in this table are taken directly from
the 1LAC (Abdo et al. 2010, Cat. J/ApJ/722/520) and have been used in
the data shuffling [FSRQ = flat-spectrum radio quasar]
Note (2): In addition to the optical spectrum classification, the 1LAC blazars
are also classified based on the position of the synchrotron peak,
following the scheme proposed by Abdo et al. (2010, Cat. J/ApJ/716/30);
we therefore also consider the three following spectral types:
* low-synchrotron-peaked (LSP, ν(Speak)<1014Hz),
* intermediate-synchrotron-peaked (ISP, 1014Hz<ν(Speak)<1015Hz), or
* high-synchrotron-peaked (HSP, ν(Speak)>1015Hz) blazars.
Note (3): We note that the measure of z for a few sources has improved
(e.g. PG 1553+113, Danforth et al. 2010ApJ...720..976D 2010ApJ...720..976D) and that for
local sources (e.g. Cen A) the redshift information does not
necessarily provide the most accurate estimate of the actual distance.
Note (4): Reference as follows:
Cr = CRATES (Healey et al. 2007, Cat. J/ApJS/171/61);
Cl = CLASS (Myers et al. 2003, Browne et al. 2003; Cat. VIII/72);
F = FRBA (Finding and Rejecting Blazar Associations for Fermi-LAT
gamma-ray sources, from 8.4GHz VLA program AH996);
N = data extrapolated from NED/NVSS/Bzcat;
A95 = Akujor & Garrington (1995A&AS..112..235A 1995A&AS..112..235A);
L97 = Laurent-Muehleisen et al. (1997, Cat. J/A+AS/122/235);
N01 = Nagar et al. (2001ApJ...559L..87N 2001ApJ...559L..87N, S8=2.92Jy used in the calculation);
T03 = Tingay et al. (2003, Cat. J/PASJ/55/351, S8=4.99Jy and S8=2.95Jy used
in the calculation for 1FGL J0522.8-3632 and 1FGL J1325.6-4300,
respectively);
U84 = Unger et al. (1984MNRAS.207..679U 1984MNRAS.207..679U).
Note (5): concurrent measurements from Owens Valley Radio Observatory (OVRO)
monitoring program (Richards et al. (2011ApJS..194...29R 2011ApJS..194...29R)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 13-Feb-2013