J/ApJ/916/28 Cross-match between Swift-BAT & Fermi-LAT 10yrs (Tsuji+, 2021)
Cross-match between the latest Swift-BAT and Fermi-LAT catalogs.
Tsuji N., Yoneda H., Inoue Y., Aramaki T., Karagiorgi G., Mukherjee R.,
Odaka H.
<Astrophys. J., 916, 28 (2021)>
=2021ApJ...916...28T 2021ApJ...916...28T
ADC_Keywords: Gamma rays; X-ray sources; Active gal. nuclei;
Cross identifications
Keywords: Catalogs ; X-ray sources ; Gamma-ray sources ;
Active galactic nuclei
Abstract:
We report the results of a cross-match study between the hard X-ray
and GeV gamma-ray catalogs, by making use of the latest 105 month
Swift-Burst Alert Telescope (BAT) and 10yr Fermi-Large Area Telescope
(LAT) catalogs, respectively. The spatial cross-matching between the
two catalogs results in the matching of 132 point-like sources,
including 5% of false-match sources. Additionally, 24 sources that
have been identified as the same identifications are matched. Among
the 75 extended sources in the Fermi-LAT catalog, 31 sources have
spatial coincidences with at least one Swift-BAT source inside their
extent. All the matched sources consist of blazars (>60%), pulsars and
pulsar wind nebulae (13%), radio galaxies (7%), binaries (5%), and
others. Compared to the original catalogs, the matched sources are
characterized by a double-peaked photon index distribution, higher
flux, and larger gamma-ray variability index. This difference arises
from the different populations of sources, particularly the large
proportion of blazars (i.e., flat-spectrum radio quasar and BL Lac).
We also report 13 cross-matched and unidentified sources. The matched
sources in this study would be promising in the intermediate energy
band between the hard X-ray and GeV gamma-ray observations, that is
the unexplored MeV gamma-ray domain.
Description:
We performed a cross-matched between the Swift-BAT 105 month catalog
(Oh+ 2018, J/ApJS/235/4) and the 4FGL-DR2 catalog
(Abdollahi+ 2020, J/ApJS/247/33 and Ballet+ 2020arXiv200511208B 2020arXiv200511208B). We
confirmed (1) 132 sources (115 firmly matched sources) by the spatial
cross-match with the separation threshold of rsep=0.08°,
(2) 31 sources (15 firmly matched sources) by the spatial cross-match
for extended sources, and (3) 24 sources (21 firmly matched sources)
by the identification match. The firmly matched sources (151 in total)
predominantly consisted of blazars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 138 156 Cross-matched point-like sources
table2.dat 122 61 Cross-matched extended sources
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See also:
IX/67 : Incremental Fermi LAT 4th source cat. (4FGL-DR3) (Fermi-LAT col., 2022)
J/A+AS/143/145 : First COMPTEL source catalogue (Schoenfelder+, 2000)
J/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)
J/A+A/524/A64 : The 54-month Palermo BAT-survey catalogue (Cusumano+, 2010)
J/ApJS/218/23 : Fermi LAT third source catalog (3FGL) (Acero+, 2015)
J/ApJS/223/15 : 8yr INTEGRAL/IBIS soft gamma-ray source obs. (Bird+, 2016)
J/AJ/155/247 : RVel of 6 X-ray cataclysmic binaries (Halpern+, 2018)
J/A+A/612/A1 : H.E.S.S. Galactic Plane Survey (HESS+, 2018)
J/ApJS/235/4 : The 105-month Swift-BAT all-sky hard X-ray survey (Oh+, 2018)
J/A+A/618/A22 : Fermi-LAT sources below 100MeV cat. (1FLE) (Principe+, 2018)
J/ApJ/881/154 : BAT AGN spectroscopic survey. XVI. Blazars (Paliya+, 2019)
J/ApJS/247/33 : The Fermi LAT fourth source catalog (4FGL) (Abdollahi+, 2020)
J/ApJ/901/3 : Blazar Radio and Optical Survey (BROS) (Itoh+, 2020)
http://fermi.gsfc.nasa.gov/ssc/data/access/lat/10yr_catalog/ : LAT 10yr data
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq [1/156] Internal index number
5- 30 A26 --- BAT Swift/BAT identifier
32- 47 A16 --- BType Type in Swift/BAT catalog
49- 71 A23 --- LAT Fermi/LAT identifier (1)
72 A1 --- f_LAT Flag ")" = Less firm association (Assoc2)
74- 78 A5 --- LType Type in Fermi/LAT catalog (2)
80- 84 F5.3 deg Sep [0.001/0.4] Separation between BAT
and LAT positions
86 A1 --- Flag Cross-matched point source flag (G1)
88 I1 --- 1FLE [0/1] Counterparts in Fermi-LAT low
energy catalog
(Principe+, 2018, J/A+A/618/A22)?
(1=yes; 0=no)
90- 96 F7.3 deg RAdeg BAT Right Ascension (J2000)
98-104 F7.3 deg DEdeg [-76/81] BAT Declination (J2000)
106-109 F4.2 --- GammaB [0.88/5.59] Swift/BAT photon index
111-114 F4.2 --- GammaL [1.45/3.8] Fermi/LAT photon index
116-122 E7.1 10-11mW/m2 FBAT [0.38/2300] Swift/BAT flux
in units of 10-11erg/s/cm2
124-130 E7.1 10-11mW/m2 FLAT [0.094/940] Fermi/LAT flux
in units of 10-11erg/s/cm2
132-138 E7.1 --- VIndex [2.6/75000] Gamma-ray variability index
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Note (1): No. 133-156 are matched by their names, not spatially matched.
Crab in 4FGL-DR2 has three entries, PSR J0534+2200,
Crab nebula (synchrotron radiation), and Crab nebula (IC scattering).
Only the synchrotron component of the nebula is shown here.
Note (2): Source types with capital letters (e.g., BLL) indicate firm
associations, while those with small letters (e.g., bll)
are associations.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Seq [1/31] Internal index number
4- 20 A17 --- LAT Fermi/LAT identifier
22 A1 --- f_LAT Flag ")" = Less firm association (Assoc2)
24- 26 A3 --- LType Type in Fermi/LAT catalog
28- 33 F6.2 deg RAdeg LAT Right Ascension (J2000)
35- 41 F7.3 deg DEdeg LAT Declination (J2000)
43- 45 F3.1 deg Ext [0.1/3.5] LAT major axis extent
47- 50 F4.2 --- GammaL [1.68/2.57] Fermi/LAT photon index
52- 59 E8.1 10-11mW/m2 FLAT [2/120] Fermi/LAT flux
in units of 10-11erg/s/cm2
60- 85 A26 --- BAT Swift/BAT identifier inside LAT
source extension
87-102 A16 --- BType Type in Swift/BAT catalog
104-106 F3.1 deg Sep [0/3.2] Separation between BAT and LAT
positions (1)
108-111 F4.2 --- GammaB [1.3/5.7] Swift/BAT photon index
113-120 A8.2 10-11mW/m2 FBAT Swift/BAT flux
in units of 10-11erg/s/cm2
122 A1 --- Flag Cross-matched point source flag (G1)
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Note (1): The nearest BAT source is listed at the top for the source
matched with more than one BAT sources.
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Global notes:
Note (G1): Flag as follows:
M = firmly Matched source;
F = False match (a spatially matched source had different identifications
and different source types in the two catalogs);
D = Different source categories between the two catalogs;
U = Unidentified source or Unknown association;
A = Ambiguous source.
See section 4.1 for full details.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 21-Dec-2022