J/ApJS/224/26 Spectral energy distributions of Roma BZCAT blazars (Mao+, 2016)
A comprehensive statistical description of radio-through-gamma-ray spectral
energy distributions of all known blazars.
Mao P., Urry C.M., Massaro F., Paggi A., Cauteruccio J., Kunzel S.R.
<Astrophys. J. Suppl. Ser., 224, 26-26 (2016)>
=2016ApJS..224...26M 2016ApJS..224...26M (SIMBAD/NED BibCode)
ADC_Keywords: Energy distributions ; Active gal. nuclei ; BL Lac objects ;
Redshifts ; Cross identifications ; Radio sources ;
Photometry, infrared ; X-ray sources ; Gamma rays
Keywords: accretion, accretion disks; BL Lacertae objects: general;
miscellaneous; quasars: general
Abstract:
We combined multi-wavelength data for blazars from the Roma-BZCAT
catalog and analyzed hundreds of X-ray spectra. We present the fluxes
and spectral energy distributions (SEDs), in 12 frequency bands from
radio to γ-rays, for a final sample of 2214 blazars. Using a
model-independent statistical approach, we looked for systematic
trends in the SEDs; the most significant trends involved the radio
luminosities and X-ray spectral indices of the blazars. We used a
principal component analysis (PCA) to determine the basis vectors of
the blazar SEDs and, in order to maximize the size of the sample,
imputed missing fluxes using the K-nearest neighbors method. Using
more than an order of magnitude more data than was available when
Fossati et al. first reported trends of SED shape with blazar
luminosity, we confirmed the anti-correlation between radio luminosity
and synchrotron peak frequency, although with greater scatter than was
seen in the smaller sample. The same trend can be seen between
bolometric luminosity and synchrotron peak frequency. Finally, we used
all of the available blazar data to determine an empirical SED
description that depends only on the radio luminosity at 1.4GHz and
the redshift. We verified that this statistically significant relation
was not a result of the luminosity-luminosity correlations that are
natural in flux-limited samples (i.e., where the correlation is
actually caused by the redshift rather than the luminosity).
Description:
We base our blazar sample on the data in the Multi-wavelength Catalog
of blazars, Roma-BZCAT v5.0 (Massaro+, 2015, see VII/274), released in
December 2014.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 174 2214 The complete data for all blazars
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See also:
VII/274 : The Roma BZCAT - 5th edition (Massaro+, 2015)
VIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)
IX/43 : 1SXPS Swift X-ray telescope point source catalogue (Evans+ 2014)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
VIII/81 : Sydney University Molonglo Sky Survey (SUMSS V2.1) (Mauch+ 2008)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
J/ApJS/218/23 : Fermi LAT third source catalog (3FGL) (Acero+, 2015)
J/ApJS/215/14 : WISE γ-ray blazar radio candidates (D'Abrusco+, 2014)
J/ApJS/213/3 : Low-frequency flat spectrum sources (LORCAT) (Massaro+, 2014)
J/ApJS/209/10 : UGSs. V. kernel approach (Massaro+, 2013)
J/ApJS/207/4 : Unidentified γ-ray sources. III. Radio (Massaro+, 2013)
J/ApJS/206/12 : Blazars with γ-ray counterparts. I. (D'Abrusco+, 2013)
J/ApJ/743/171 : The 2LAC catalog (Ackermann+, 2011)
J/ApJ/740/98 : Synchroton peak for blazars and radio galaxies (Meyer+, 2011)
J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)
J/A+A/495/691 : Multifreq. catalog of blazars, Roma-BZCAT (Massaro+, 2009)
J/A+A/488/867 : Synchrotron peak frequency of 135 AGN (Nieppola+, 2008)
J/A+A/445/441 : SED of BL Lacertae objects (Nieppola+, 2006)
J/A+A/375/739 : Hard X-ray properties of blazars (Donato+, 2001)
J/MNRAS/323/757 : Deep X-Ray Radio Blazar Survey (DXRBS). II. (Landt+, 2001)
J/ApJS/94/551 : The first EGRET catalog (Fichtel+ 1994)
http://www.asdc.asi.it/bzcat/ : The Roma BZCAT home page
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- BZCAT BZCAT identifier (BZ{B/Q}JHHMM+DDMM)
15- 33 A19 --- WISE WISE identifier (JHHMMSS.ss+DDMMSS.s) if any
35- 38 A4 --- --- [3FGL]
40- 51 A12 --- 3FGL Fermi identifier (JHHMM.m+DDMM) if any
53- 62 F10.6 deg RAdeg Right ascension (J2000)
64- 73 F10.6 deg DEdeg Declination (J2000)
75- 79 F5.3 --- z [0.03/6.9] Roma-BZCAT redshift
81- 86 F6.3 [10-7W] L1.4GHz [39.7/45.5] NVSS/FIRST 1.4GHz luminosity;
in erg/s
88- 93 F6.3 [10-7W] L5GHz [40.5/45.9]? Roma-BZCAT 5GHz luminosity;
in erg/s
95-100 F6.3 [10-7W] L22um [42.8/48.4]? WISE W4 (22um) luminosity;
in erg/s
102-107 F6.3 [10-7W] L12um [42.9/48.1]? WISE W3 (12um) luminosity;
in erg/s
109-114 F6.3 [10-7W] L4.6um [43.1/48.3]? WISE W2 (4.6um) luminosity;
in erg/s
116-121 F6.3 [10-7W] L3.4um [43/49.2]? WISE W1 (3.4um) luminosity;
in erg/s
123-128 F6.3 [10-7W] Lz [43.6/47.5]? SDSS z-band luminosity;
in erg/s
130-135 F6.3 [10-7W] Li [43.6/47.4]? SDSS i-band luminosity;
in erg/s
137-142 F6.3 [10-7W] Lr [43.6/48.7]? SDSS r-band luminosity;
in erg/s
144-149 F6.3 [10-7W] Lg [43.6/49.2]? SDSS g-band luminosity;
in erg/s
151-156 F6.3 [10-7W] Lx [42.2/47.3]? Swift/XRT X-ray luminosity;
in erg/s
158-163 F6.3 [10-7W] LGam [42.9/48.7]? Fermi/LAT gamma-ray luminosity;
in erg/s
165-169 F5.2 --- alpha [-4.2/4]? X-ray photon index
171-174 F4.2 --- gamma [1.2/3.1]? Gamma-ray photon index
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Nomenclature note:
Objects are <[MGL2015] 5BZB JHHMM+DDMM> or
<[MGL2015] 5BZQ JHHMM+DDMM> in Simbad.
History:
From electronic version of the journal
References:
Mao et al. Paper I. 2016ApJS..224...26M 2016ApJS..224...26M This catalog
Mao & Urry Paper II. 2017ApJ...841..113M 2017ApJ...841..113M Cat. J/ApJ/841/113
(End) Emmanuelle Perret [CDS] 13-Apr-2017