J/ApJS/263/24 The 4LAC-DR3 catalog (Ajello+, 2022)
The fourth catalog of active galactic nuclei detected by the Fermi Large Area
Telescope: Data Release 3.
Ajello M., Baldini L., Ballet J., Bastieri D., Becerra Gonzalez J.,
Bellazzini R., Berretta A., Bissaldi E., Bonino R., Brill A., Bruel P.,
Buson S., Caputo R., Caraveo P.A., Cheung C.C., Chiaro G., Cibrario N.,
Ciprini S., Crnogorcevic M., Cutini S., D'ammando F., De Gaetano S.,
Di Lalla N., Di Venere L., Dominguez A., Ramazani V.F., Ferrara E.C.,
Fiori A., Fukazawa Y., Funk S., Fusco P., Gammaldi V., Gargano F.,
Garrappa S., Gasparrini D., Giglietto N., Giordano F., Giroletti M.,
Green D., Grenier I.A., Guiriec S., Horan D., Hou X., Kayanoki T., Kuss M.,
Larsson S., Latronico L., Lewis T., Li J., Liodakis I., Longo F.,
Loparco F., Lott B., Lovellette M.N., Lubrano P., Madejski G.M.,
Maldera S., Manfreda A., Marti-devesa G., Mazziotta M.N., Mereu I.,
Michelson P.F., Mirabal N., Mitthumsiri W., Mizuno T., Monzani M.E.,
Morselli A., Moskalenko I.V., Negro M., Ojha R., Orienti M., Orlando E.,
Ormes J.F., Pei Z., Pena-herazo H., Persic M., Pesce-rollins M.,
Petrosian V., Pillera R., Poon H., Porter T.A., Principe G., Raino S.,
Rando R., Rani B., Razzano M., Razzaque S., Reimer A., Reimer O.,
Scotton L., Serini D., Sgro C., Siskind E.J., Spandre G., Spinelli P.,
Suson D.J., Tajima H., Torres D.F., Valverde J., Yassin H., Zaharijas G.
<Astrophys. J. Suppl. Ser., 263, 24 (2022)>
=2022ApJS..263...24A 2022ApJS..263...24A (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei; Gamma rays; Surveys; Galaxies, radio;
BL Lac objects; QSOs
Keywords: Active galactic nuclei; Gamma-ray astronomy;
Blazars; Flat-spectrum radio quasars; BL Lacertae objects;
Spectral energy distribution
Abstract:
An incremental version of the fourth catalog of active galactic nuclei
(AGNs) detected by the Fermi Large Area Telescope is presented. This
version (4LAC-DR3) derives from the third data release of the 4FGL
catalog based on 12yr of E>50MeV gamma-ray data, where the spectral
parameters, spectral energy distributions (SEDs), yearly light curves,
and associations have been updated for all sources. The new reported
AGNs include 587 blazar candidates and four radio galaxies. We
describe the properties of the new sample and outline changes
affecting the previously published one. We also introduce two new
parameters in this release, namely the peak energy of the SED
high-energy component and the corresponding flux. These parameters
allow an assessment of the Compton dominance, the ratio of the
inverse-Compton to the synchrotron-peak luminosities, without relying
on X-ray data.
Description:
Here we present the third update to the 4LAC catalog, derived from
4FGL-DR3 (Abdollahi+ 2022, IX/67) using 12yr of data and comprising
1607 new sources relative to the initial 4FGL catalog. The properties
of the 283 new 4FGL-DR2 and 308 new 4FGL-DR3 AGNs are discussed.
These AGNs are all blazars except for four radio galaxies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
cat-h.dat 454 3407 4LAC-DR3 high Galactic latitude sources (|b|>10deg)
cat-l.dat 454 407 4LAC-DR3 low Galactic latitude sources (|b|<10deg)
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Description of file:
table4LACDR3_h.fits and table4LACDR3_l.fits are the original
tables in FITS format for the high Galactic latitude sources
(|b|>10deg) and low Galactic latitude sources (|b|<10deg),
respectively.
See also:
IX/67 : Incremental Fermi LAT 4th source cat. (4FGL-DR3) (Fermi-LAT col., 2022)
J/A+A/484/119 : Multi-epoch VLBI survey of CJF sources (Britzen+, 2008)
J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)
J/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)
J/ApJ/740/98 : Synchroton peak for blazars and radio galaxies (Meyer+, 2011)
J/ApJ/743/171 : The 2LAC catalog (Ackermann+, 2011)
J/A+A/544/A18 : Radio galaxies of the local universe (van Velzen+, 2012)
J/ApJ/810/14 : Third catalog of LAT-detected AGNs (3LAC) (Ackermann+, 2015)
J/ApJS/247/33 : The Fermi LAT fourth source catalog (4FGL) (Abdollahi+, 2020)
J/ApJ/892/105 : 4th catalog of Fermi LAT-detected AGNs (4LAC) (Ajello+, 2020)
J/A+A/643/A103 : Fermi-LAT low-energy counterparts (Pena-Herazo+, 2020)
J/AJ/161/196 : Opt. overview of blazars with LAMOST. I. (Pena-herazo+, 2021)
J/ApJS/253/46 : Optical spectroscopy of Fermi blazars (Paliya+, 2021)
J/ApJS/254/26 : Identifying 3FHL. V. CTIO-COSMOS spectra (Rajagopal+, 2021)
Byte-by-byte Description of file: cat*.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- --- [4FGL]
6- 18 A13 --- 4FGL 4FGL name (JHHMM.m+DDMMa) (Source_Name) (1)
20 I1 --- DR [1/3] Data release (DataRelease) (2)
22- 29 F8.4 deg RAdeg Right ascension in decimal degrees (J2000)
31- 38 F8.4 deg DEdeg Declination in decimal degrees (J2000)
40- 48 F9.5 deg GLON Galactic longitude
50- 57 F8.4 deg GLAT Galactic latitude
59- 67 F9.5 --- Sig [2.6/455] Source significance in σ
units over the 50MeV to 1TeV band
(Signif_Avg)
69- 80 E12.6 ph/cm2/s F1000i [8.9e-12/7.5e-8] Integral photon flux from
1 to 100GeV (Flux1000)
82- 93 E12.6 ph/cm2/s e_F1000i [7.5e-12/4.5e-10] F1000i 1σ error
(Unc_Flux1000)
95- 106 E12.6 mW/m2 EF100 [3.7e-13/8.5e-10] Energy flux from 100MeV
to 100GeV obtained by spectral fitting in
erg/cm2/s (Energy_Flux100)
108- 119 E12.6 mW/m2 e_EF100 [1e-13/6.8e-12] EF100 1σ error
(UncEnergyFlux100)
121- 137 A17 --- Mod Spectral type in the global model;
PowerLaw, LogParabola or PLSuperExpCutoff
(SpectrumType)
139- 145 F7.5 --- PLGam [1.4/3.2] Photon index when fitting with
PowerLaw (PL_Index)
147- 154 F8.6 --- e_PLGam [0.003/0.3] PLGam 1σ error
(UncPLIndex)
156- 164 F9.3 MeV Epiv [241/34572] Pivot energy (Pivot_Energy)
166- 174 F9.6 --- LPalpha [-0.05/3.3] Photon index at Pivot_Energy
(α) when fitting with LogParabola
(LP_Index)
176- 183 F8.6 --- e_LPalpha [0.004/3] LPalpha 1σ error
(UncLPIndex)
185- 193 F9.6 --- LPbeta [-0.12/1] Curvature parameter (β)
when fitting with LogParabola (LP_beta)
195- 202 F8.6 --- e_LPbeta [0.002/1.8]? LPbeta 1σ error
(UncLPbeta)
204- 207 I4 --- Flags [0/6144] Analysis flags (Flags)
209- 213 A5 --- Class Class designation for associated source
215- 242 A28 --- Assoc1 Name of identified or likely associated
source
244- 251 F8.6 --- ProbBY [0/1]? Probability of association
according to the Bayesian method
(ASSOCPROBBAY)
253- 260 F8.6 --- ProbLR [0/1] Probability of association according
to the likelihood-ratio method
(ASSOCPROBLR)
262- 271 A10 --- CCat Counterpart catalog driving the
association (Counterpart_Catalog) (3)
273- 283 F11.7 deg RACdeg Right ascension of the counterpart Assoc1
(J2000) (RA_Counterpart)
285- 295 F11.7 deg DECdeg Declination of the counterpart Assoc1
(J2000) (DEC_Counterpart)
297- 308 E12.7 deg errCPos [3.8e-8/2.5] 95% precision of the
counterpart localization (Unc_Counterpart)
310- 312 A3 --- --- [RFC]
314- 323 A10 --- RFC Name of the very long baseline
interferometry counterpart
(VLBI_Counterpart)
325- 332 F8.6 --- z [1.7e-5/4.4]? Redshift (Redshift)
334- 336 A3 --- SEDCl SED-based class (SED_class)
338- 349 E12.6 MeV EpkHE [0.04/1.2e+8]? Energy in the observer
frame of the high-energy SED peak
(HE_EPeak)
351- 362 E12.6 MeV e_EpkHE [0.5/5.5e+9]? EpkHE 1σ error
(UncHEEPeak)
364- 375 E12.6 MeV/cm2/s nuFnuPk [7e-8/0.0002]? νFν at
high-energy-peak frequency in
MeV/cm2/s (HE_nuFnuPeak)
377- 388 E12.6 MeV/cm2/s e_nuFnuPk [2.4e-8/0.00011]? nuFnuPk 1σ error
(UncHEnuFnuPeak)
390- 401 E12.6 Hz nu [0/1.8e+20] Synchrotron-peak frequency in
the observer frame (nu_syn)
403- 414 E12.6 mW/m2 nuFnu [0/8e-10] νFν at synchrotron-peak
frequency in erg/cm2/s (nuFnu_syn)
416- 426 F11.5 --- Var [1.6/84341] Variability index
(Variability_Index)
428- 435 F8.6 --- fVar [0/3] Fractional variability
(Frac_Variability)
437- 445 F9.6 --- e_fVar [0.01/10] fVar 1σ error
(UncFracVariability)
447- 454 F8.4 GeV Emax [10/913]? Energy (if greater than 10GeV)
of the highest-energy ULTRACLEANVETO
photon with association probability P>0.95
(Highest_energy)
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Note (1): The coordinates are rounded.
Note (2): Data release as follows:
1 = 4FGL (Abdollahi+ 2020, J/ApJS/247/33)
2 = new in DR2 (Lott+ 2020arXiv201008406L 2020arXiv201008406L)
3 = new or changed in DR3
Note (3): Counterpart catalog as follows:
at20g = ATCA 20GHz southern sky survey, Murphy+ 2010, J/MNRAS/402/2403
bllac = BL Lac in Veron-Cetty & Veron 2010, VII/258
bzcat = Massaro et al. 2015, VII/274
cgrabs = Healey et al. 2008, J/ApJS/175/97
crates = Healey et al. 2007, J/ApJS/171/61
dwarfs = (1 occurrence)
hmxb = The tentative association of 4FGL J0647.7-4418 with the high-mass
X-ray binary RX J0648.0-4418 reported in 4FGL-DR1 has been
replaced by the association with the BCU SUMSS J064744-441946
following the multiwavelength investigation of
Marti+ (2020MNRAS.492.4291M 2020MNRAS.492.4291M).
identified = (71+5 occurrences)
magn = (4+1 occurrences)
nvss = NRAO VLA Sky Survey; Condon et al. 1998, VIII/65
qso = QSO in Veron-Cetty & Veron 2010, VII/258
rass = ROSAT All Sky Survey (RASS) Bright and Faint Source Catalogs
(Voges et al. 1999, IX/10 and 2000, IX/29)
rfc = Petrov et al. 2019MNRAS.485...88P 2019MNRAS.485...88P
seyrl_b = Following Jarvela+ (2020A&A...636L..12J 2020A&A...636L..12J), we have reclassified
TXS 2116-077 (4FGL J2118.8-0723) as a Seyfert galaxy instead of
a NLSY1 (see Paliya+ 2020ApJ...892..133P 2020ApJ...892..133P for an alternative view).
sumss = The Sydney University Molonglo Sky Survey
(Mauch+ 2003MNRAS.342.1117M 2003MNRAS.342.1117M, see VIII/81)
whsp2 = 2WHSP, Chang et al. 2017, J/A+A/598/A17
wise = WISE blazar catalog, D'Abrusco et al. 2014, J/ApJS/215/14
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Acknowledgements:
Benoit Lott [lott at cenbg.in2p3.fr]
History:
From electronic version of the journal
11-Apr-2023: Insert into VizieR
03-Dec-2024: Units corrected for nuFnuPk and e_nuFnuPk in MeV/cm2/s
(End) Emmanuelle Perret [CDS] 27-Jan-2023