J/ApJ/700/597 FERMI LAT detected blazars (Abdo+, 2009)
Bright active galactic nuclei source list from the first three months of the
Fermi Large Area Telescope all-sky survey.
Abdo A.A., Ackermann M., Ajello M., Atwood W.B., Axelsson M., Baldini L.,
Ballet J., Barbiellini G., Bastieri D., Baughman B.M., Bechtol K.,
Bellazzini R., Blandford R.D., Bloom E.D., Bonamente E., Borgland A.W.,
Bouvier A., Bregeon J., Brez A., Brigida M., Bruel P., Burnett T.H.,
Caliandro G.A., Cameron R.A., Caraveo P.A., Casandjian J.M., Cavazzuti E.,
Cecchi C., Charles E., Chekhtman A., Chen A.W., Cheung C.C., Chiang J.,
Ciprini S., Claus R., Cohen-Tanugi J., Colafrancesco S., Collmar W.,
Cominsky L.R., Conrad J., Costamante L., Cutini S., Dermer C.D.,
de Angelis A., de Palma F., Digel S.W., do Couto e Silva E., Drell P.S.,
Dubois R., Dumora D., Farnier C., Favuzzi C., Fegan S.J., Ferrara E.C.,
Finke J., Focke W.B., Foschini L., Frailis M., Fuhrmann L., Fukazawa Y.,
Funk S., Fusco P., Gargano F., Gasparrini D., Gehrels N., Germani S.,
Giebels B., Giglietto N., Giommi P., Giordano F., Giroletti M.,
Glanzman T., Godfrey G., Grenier I.A., Grondin M.-H., Grove J.E.,
Guillemot L., Guiriec S., Hanabata Y., Harding A.K., Hartman R.C.,
Hayashida M., Hays E., Healey S.E., Horan D., Hughes R.E., Johannesson G.,
Johnson A.S., Johnson R.P., Johnson T.J., Johnson W.N., Kadler M.,
Kamae T., Katagiri H., Kataoka J., Kerr M., Knodlseder J., Kocian M.L.,
Kuehn F., Kuss M., Lande J., Latronico L., Lemoine-Goumard M., Longo F.,
Loparco F., Lott B., Lovellette M.N., Lubrano P., Madejski G.M., Makeev A.,
Massaro E., Mazziotta M.N., McConville W., McEnery J.E., McGlynn S.,
Meurer C., Michelson P.F., Mitthumsiri W., Mizuno T., Moiseev A.A.,
Monte C., Monzani M.E., Moretti E., Morselli A., Moskalenko I.V.,
Murgia S., Nolan P.L., Norris J.P., Nuss E., Ohsugi T., Omodei N.,
Orlando E., Ormes J.F., Ozaki M., Paneque D., Panetta J.H., Parent D.,
Pelassa V., Pepe M., Pesce-Rollins M., Piron F., Porter T.A., Raino S.,
Rando R., Razzano M., Razzaque S., Reimer A., Reimer O., Reposeur T.,
Reyes L.C., Ritz S., Rochester L.S., Rodriguez A.Y., Romani R.W., Ryde F.,
Sadrozinski H.F.-W., Sanchez D., Sander A., Saz Parkinson P.M.,
Scargle J.D., Schalk T.L., Sellerholm A., Sgro C., Shaw M.S., Smith D.A.,
Smith P.D., Spandre G., Spinelli P., Starck J.-L., Strickman M.S.,
Suson D.J., Tajima H., Takahashi H., Takahashi T., Tanaka T., Taylor G.B.,
Thayer J.B., Thayer J.G., Thompson D.J., Tibaldo L., Torres D.F., Tosti G.,
Tramacere A., Uchiyama Y., Usher T.L., Vilchez N., Villata M., Vitale V.,
Waite A.P., Winer B.L., Wood K.S., Ylinen T., Ziegler M.
<Astrophys. J., 700, 597-622 (2009)>
=2009ApJ...700..597A 2009ApJ...700..597A
ADC_Keywords: BL Lac objects ; Active gal. nuclei ; Gamma rays
Mission_Name: Fermi
Keywords: BL Lacertae objects: general - galaxies: active - galaxies: jets -
gamma rays: observations
Abstract:
The first three months of sky-survey operation with the Large Area
Telescope (LAT) onboard the Fermi Gamma-Ray Space Telescope reveal 132
bright sources at |b|>10° with test statistic greater than 100
(corresponding to about 10σ). Two methods, based on the CGRaBS,
CRATES, and BZCat catalogs, indicate high-confidence associations of
106 of these sources with known active galactic nuclei (AGNs). This
sample is referred to as the LAT Bright AGN Sample (LBAS). It contains
two radio galaxies, namely, Centaurus A and NGC 1275, and 104 blazars
consisting of 58 flat spectrum radio quasars (FSRQs), 42 BL Lac
objects, and 4 blazars with unknown classification. Four new blazars
were discovered on the basis of the LAT detections. Remarkably, the
LBAS includes 10 high-energy-peaked BL Lacs (HBLs), sources which were
previously difficult to detect in the GeV range. Another 10
lower-confidence associations are found. Only 33 of the sources, plus
two at |b|<10°, were previously detected with Energetic Gamma-Ray
Experiment Telescope (EGRET), probably due to variability.
Description:
The Fermi-LAT is a pair-conversion γ-ray telescope sensitive to
photon energies greater than 20MeV. The LAT data used here were
collected during the first three month all-sky survey, from 2008
August 4-October 30. We refer to the companion paper (Abdo et al.
2009, Cat. J/ApJS/183/46) for a full description of the data selection
and analysis.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 100 106 The high-confidence association bright AGN list
table2.dat 100 11 The low-confidence association bright AGN list
table3.dat 99 116 The Fermi-LAT |b|>10° bright AGN list
table4.dat 74 35 Sources in both the Fermi-LAT and EGRET samples
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See also:
J/ApJS/189/1 : A 3.5mm polarimetric survey of radio-loud AGNs (Agudo+, 2010)
J/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)
J/A+A/495/691 : Multifrequency catalogue of blazars, Roma-BZCAT (Massaro+,
2009)
J/ApJS/183/46 : Fermi/LAT bright gamma-ray source list (0FGL) (Abdo+, 2009)
J/ApJS/175/97 : CGRaBS: survey of γ-ray blazar candidates (Healey+,
2008)
J/ApJS/171/61 : All-Sky Survey of Flat-Spectrum Radio Sources (Healey+, 2007)
J/ApJ/609/564 : Blazar counterparts for 3EG sources (Sowards-Emmerd+, 2004)
J/ApJ/590/109 : Gamma-ray blazar in northern sky (Sowards-Emmerd+, 2003)
J/ApJS/135/155 : Radio identification of 3EG EGRET sources (Mattox+, 2001)
J/ApJS/123/79 : Third EGRET catalog (3EG) (Hartman+, 1999)
J/ApJ/481/95 : Radio identification of EGRET sources (Mattox+ 1997)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [0FGL]
6- 17 A12 --- 0FGL Fermi/LAT name (JHHMM.m+DDMM)
19- 35 A17 --- FoMId FoM source name (1)(2)
37- 41 F5.2 --- FoM ? Observational figure of merit (FoM) (1)
43- 46 F4.2 --- pr1 ? Association probability with FoMId (1)
48- 64 A17 --- gtsrcid Source name with the second method (2)(1)
66- 69 F4.2 --- pr2 ? Association probability for the 2nd method (1)
71- 86 A16 --- OName Other name(s)
87- 91 F5.3 --- z ? Redshift
92 A1 --- r_z [c] redshift from Nilsson et al.
(2008A&A...487L..29N 2008A&A...487L..29N)
94- 99 A6 --- Class Object type (4)
100 A1 --- f_Class [b] Flag on Class (always when Class is "Un")
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Note (1): In order to find associations between LAT sources and AGNs, two
different approaches were pursued. The first method is based on a
procedure similar to that developed by Sowards-Emmerd et al. (2003,
Cat. J/ApJ/590/109) for associating EGRET blazars with radio
counterparts using an observational figure of merit (FoM). The second
one is based on the calculation of source association probabilities
following a Bayesian approach (de Ruiter et al. 1977A&AS...28..211D 1977A&AS...28..211D;
Sutherland & Saunders 1992MNRAS.259..413S 1992MNRAS.259..413S), similar to that used by
Mattox et al. (2001, Cat. J/ApJS/135/155) to associate EGRET sources
with radio sources. This method is implemented in the gtsrcid tool
(part of the ScienceTools package) and is described in Abdo et al.
(2009, Cat. J/ApJS/183/46).
Note (2): Identifications from catalogs below:
CGRaBS = Candidate Gamma-Ray Blazar Survey (Healey et al. 2008,
Cat. J/ApJS/175/97; <CGRaBS JHHMM+DDMM> in Simbad)
CRATES = Combined Radio All-Sky Targeted Eight GHz Survey (Healey et al.
2007, Cat. J/ApJS/171/61; for Simbad)
BZB,BZQ = the BZCat multifrequency blazar catalog (Massaro et al. 2009,
Cat. J/A+A/495/691; <[MGL2009] BZ{BQU} JHHMM+DDMM> in Simbad)
Note (4): Class as follows:
BL Lac = BL Lac object
FSRQ = Flat Spectrum Radio Quasar
RG = Radio Galaxy
Un = unknown class: these sources have poor signal-to-noise ratios (S/Ns)
in their optical spectra, so the wavelengths and equivalent widths
of the lines cannot be accurately measured and the redshifts cannot
be determined. All these sources have a flat radio spectrum but
existing data do not allow us to classify them either as FSRQs
or BL Lacs.
See section 3.2 for further details.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- --- [0FGL]
6- 17 A12 --- 0FGL Fermi/LAT name (JHHMM.m+DDMM)
19- 25 F7.3 deg RAdeg Right ascension in decimal degrees (J2000)
27- 33 F7.3 deg DEdeg Declination in decimal degrees (J2000)
35- 41 F7.3 deg GLON Galactic longitude
43- 49 F7.3 deg GLAT Galactic latitude
51- 55 F5.1 --- TS TS0.5, the test statistic (TS) parameter
measuring the significance of the detection
57- 60 F4.2 --- Gamma Spectral index Γ (1)
62- 65 F4.2 --- e_Gamma Gamma uncertainty
67- 71 F5.1 10-4/m2/s F100 Photon flux from fit on 0.2-100 GeV (2)
73- 75 F3.1 10-4/m2/s e_F100 F100 uncertainty
77- 81 F5.1 10-4/m2/s Fp Weekly averaged peak flux (2)
83- 86 F4.1 10-4/m2/s e_Fp Fp uncertainty
88- 92 F5.1 10-4/m2/s F25 Flux obtained by adding the estimates on the
energy ranges 0.1-1GeV and 1-100GeV (2)
94- 96 F3.1 10-4/m2/s e_F25 F25 uncertainty
97 A1 --- f_F25 [d] when F25 refers to E>1GeV photons (3)
99 A1 --- Var [T] Variability flag: T for True
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Note (1): Spectral index and Flux derived from a single power-law fit over the
0.2-100GeV energy range.
Note (2): photon flux F(E>100MeV) in units of 10-8photons/cm2/s
Note (3): for these sources, only an upper limit is obtained for the
0.1-1GeV flux (see Abdo et al. 2009, Cat. J/ApJS/183/46).
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- --- [0FGL]
6- 17 A12 --- 0FGL Fermi/LAT name (JHHMM.m+DDMM) (1)
19 A1 --- f_0FGL [a] a: source located at |b|<10°
21- 30 A10 --- 3EG EGRET name (JHHMM+DDMM) from Hartman et al.,
Cat. J/ApJS/123/79
32- 36 F5.1 10-4/m2/s FLATm LAT mean flux F(E>100MeV)
38- 43 F6.2 10-4/m2/s FLATp LAT peak flux F(E>100MeV)
45- 48 F4.2 --- GamLAT Fermi/LAT spectral index Γ
50- 53 F4.1 10-4/m2/s F3EGm EGRET mean flux F(E>100MeV)
55- 59 F5.1 10-4/m2/s F3EGp EGRET peak flux F(E>100MeV)
61- 64 F4.2 --- Gam3EG EGRET spectral index Γ
66- 74 A9 --- Type Object type
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Note (1): 0FGL J1256.1-0548 is a misprint for 0FGL J1256.1-0547;
corrected at CDS.
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 19-Jul-2011