J/A+A/632/A77 3HSP blazars catalog (Chang+, 2019)
The 3HSP catalog of extreme and high-synchrotron peaked blazars.
Chang Y.-L., Arsioli B., Giommi P., Padovani P., Brandt C.
<Astron. Astrophys. 632, A77 (2019)>
=2019A&A...632A..77C 2019A&A...632A..77C (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; BL Lac objects ; Gamma rays
Keywords: galaxies: active - BL Lacertae objects: general -
radiation mechanisms: non-thermal - gamma rays: galaxies
Abstract:
High-synchrotron peaked blazars (HSPs or HBLs) play a central role in
very high-energy (VHE) γ-ray astronomy, and likely in neutrino
astronomy. Currently, the largest compilation of HSP blazars, the
2WHSP sample, includes 1691 sources, but it is not complete in the
radio or in the X-ray band. In order to provide a larger and more
accurate set of HSP blazars that is useful for future statistical
studies and to plan for VHE/TeV observations, we present the 3HSP
catalogue, the largest sample of extreme and high-synchrotron peaked
(EHSP; HSP) blazars and blazar candidates.
We implemented several ways to improve the size and the completeness
of the 2WHSP catalogue and reduced the selection biases to be taken
into consideration in population studies. By discarding the IR
constraint and relaxing the radio-IR and IR-X-ray slope criteria, we
were able to select more sources with peak close to the 1015Hz
threshold and objects where the host galaxy dominates the flux. The
selection of extra sources now commences with a crossmatching between
radio and X-ray surveys, applying a simple flux ratio cut. We also
considered Fermi-LAT catalogues to find reasonable HSP-candidates that
are detected in the γ-ray band but are not included in X-ray or
radio source catalogues. The new method, and the use of newly
available multi-frequency data, allowed us to add 395 sources to the
sample, to remove 73 2WHSP sources that were previously agged as
uncertain and could not be confirmed as genuine HSP blazars, and to
update parameters obtained by fitting the synchrotron component.
The 3HSP catalogue includes 2013 sources, 88% of which with a redshift
estimation, a much higher percentage than in any other list of HSP
blazars. All new γ-ray detections are described in the First and
Second Brazil ICRANet γ-ray blazar catalogues (1BIGB & 2BIGB)
also taking into account the 4FGL list of γ-ray sources
published by the Fermi Large Area Telescope (Fermi-LAT) team.
Moreover, the cross-matching between the 2WHSP, 2FHL HSP, and IceCube
neutrino positions suggests that HSPs are likely counterparts of
neutrino events, which implies the 3HSP catalogue is also useful in
that respect. The 3HSP catalogue shows improved completeness compared
to its predecessors, the 1WHSP and 2WHSP catalogues, and follows the
track of their increasing relevance for VHE astronomy.
Description:
The 3HSP catalog is an HSP catalog based on multifrequency data. The
catalog includes 2013 sources, 88% of which with a redshift
estimation, a much higher percentage than in any other list of HSP
blazars. Among these 2013 sources, 1007 of them have Fermi gamma-ray
counterparts. The catalog will provide seed sources for future very
high energy observations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
3hsp-v9.dat 126 2013 The 3HSP catalog (table 1)
table2.dat 83 384 The extreme sources
table3.dat 71 19 Fermi association
table4.dat 56 24 Sources without radio counterparts
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See also:
VII/274 : The Roma BZCAT - 5th edition (Massaro+, 2015)
J/ApJS/218/23 : Fermi LAT third source catalog (3FGL) (Acero+, 2015)
J/A+A/579/A34 : 1WHSP: VHE γ-ray blazar candidates (Arsioli+, 2015)
J/A+A/598/A17 : The 2WHSP catalog (Chang+, 2017)
J/ApJS/232/18 : The third Fermi-LAT >10GeV catalog (3FHL) (Ajello+, 2017)
J/A+A/598/A134 : γ-ray signature in WHSP blazars (Arsioli+, 2017)
Byte-by-byte Description of file: 3hsp-v9.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- Name Designation (3HSPJHHMMSS.s+DDMMSS)
22- 30 F9.5 deg RAdeg Right ascension (J2000)
32- 40 F9.5 deg DEdeg Declination (J2000)
42 I1 --- sflag [0/4] Source Flag (1)
44- 57 A14 --- BZCat BZCat counterpart (5BZ[BGU]JHHMMSS.s+DDMMSS)
59- 62 F4.1 [Hz] lognu Log Synchrotron peak frequency
64- 68 F5.1 [mW/m2] lognufnu Log Synchrotron peak flux (erg/cm2/s)
70 I1 --- f_lognu [1/3] Synchrotron peak estimation flag (G1)
72- 77 F6.4 --- z ?=- Redshift
79 I1 --- f_z [0/5]?=- Redshift flag (G1)
81- 98 A18 --- Gamma Fermi gamma-ray counterpart
100-104 F5.2 --- FOM Figure of Merit (G2)
106-126 A21 --- WHSP 2WHSP counterpart (2WHSPJHHMMSS.s+DDMMSS)
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Note (1): Source flag as follows:
1 = uncertain sources
2 = dubious photometric sources
3 = relatively low peak flux-radio flux ratio sources
4 = ambiguous origins of IR and optical data (either from synchrotron or
from host galaxy)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- Name Designation (3HSPJHHMMSS.s+DDMMSS)
22 A1 --- l_lognu Limit flag on lognu
23- 26 F4.1 [Hz] lognu Log Synchrotron peak frequency
27 A1 --- u_lognu [?] Uncertainty flag on lognu
29- 33 F5.3 --- z ?=- Redshift
35 I1 --- f_z [1/5]?=- Redshift flag (G1)
37- 41 F5.2 --- FOM Figure of Merit (G2)
44- 47 A4 --- BZCat [5BZ BGU] BZCat counterpart
49- 51 A3 --- WHSP [yes ] 2WHSP counterpart
53- 68 A16 --- Gamma Fermi gamma-ray counterpart (2)
70- 83 A14 --- TeV TeV counterpart
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Note (2): For those beginning with J instead of a catalogue name (such as 3FGL,
4FGL) the γ-ray detections are from the 1BIGB catalogue
(Arsioli & Chang, 2017, Cat. J/A+A/598/A134).
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- Name Designation (3HSPJHHMMSS.s+DDMMSS)
22- 30 F9.5 deg RAdeg Right ascension (J2000)
32- 40 F9.5 deg DEdeg Declination (J2000)
42- 53 A12 --- 4FGL Fermi 4FGL counterpart (JHHMM.m+DDMM)
54 A1 ---- n_4FGL [*] Note on 4FGL (1)
56- 67 A12 --- 3FHL Fermi 3FHL counterpart (JHHMM.m+DDMM)
69- 71 A3 --- Kaur2019 [yes no] Counterpart in Kaur et al.
(2019ApJ...871...94K 2019ApJ...871...94K)
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Note (1): * for sources not in 4FGL, but in 3FGL.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 21 A21 --- Name Designation (3HSP JHHMMSS.s+DDMMSS)
23- 26 F4.1 [Hz] lognu Log Synchrotron peak frequency
28- 31 F4.2 --- z ? Redshift
33 I1 --- f_z [0/5]?=- Redshift flag (G1)
35- 51 A17 --- Gamma 4FGL name (4FGL JHHMM.m+DDMM)
53- 56 F4.2 --- FOM Figure of merit (G2)
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Global notes:
Note (G1) Flags as follows:
1 = firm estimation
2 = uncertain value
3 = lower limit
4 = photometric redshift of an object with featureless optical spectrum
5 = photometric redshift of an objects for which no optical spectrum
is available
Note (G2): Figure of Merit, defined in units of 2.5*10-12erg/s/cm2
(Log nupeakfnu-peak=-11.6), which is the peak flux of the faintest HSP
blazar that has been detected in the TeVCat (see 1WHSP paper, Arsioli et al.,
2015A&A...579A..34A 2015A&A...579A..34A, Cat. J/A+A/579/A34) for more details).
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Acknowledgements:
Yu-Ling Chang, ylchang(at)sjtu.edu.cn
(End) Yu-Ling Chang [TDLI], Patricia Vannier [CDS] 31-Oct-2019