J/A+A/686/A178 Optically selected blazars (Kudenko+, 2024)
An isotropic full-sky sample of optically selected blazars.
Kudenko M., Troitsky S.
<Astron. Astrophys. 686, A178 (2024)>
=2024A&A...686A.178K 2024A&A...686A.178K (SIMBAD/NED BibCode)
ADC_Keywords: BL Lac objects ; QSOs ; Radio sources
Keywords: catalogs - galaxies: active - BL Lacertae objects: general -
quasars: general - astroparticle physics
Abstract:
Various high-energy phenomena in the Universe are associated with
blazars, powerful active galaxies with jets pointing to the observer.
Novel results relating blazars to high-energy neutrinos, cosmic rays,
and even possible manifestations of new particle physics, are often
based on statistical analyses of blazar samples, and uniform sky
coverage is important for many of these studies. Here, we construct a
uniform full-sky catalog of blazars selected by their optical
emission. We define criteria of isotropy, making a special effort to
cover the Galactic plane region, and compile an isotropic sample of
blazars with GAIA optical magnitudes G<18mag, corrected for the
Galactic absorption. The sources are taken from full-sky samples
selected by parsec-scale radio emission or by high-energy gamma-ray
flux, both being known to efficiently select blazar-like objects. We
present a catalog of 651 optically bright blazars, uniformly
distributed in the sky, together with their radio, optical, X-ray and
gamma-ray fluxes, and an isotropic sample of 336 confirmed BL Lac type
objects. This catalog may be used in future statistical studies of
energetic neutrinos, cosmic rays and gamma rays.
Description:
Two samples of blazars with extinction-corrected optical magnitudes
Gcorr<18m, satisfying criteria of large-scale full-sky isotropy.
These samples were selected from VLBI and gamma-ray catalogs and
supplemented by X-ray associations. The first catalog gives positions,
radio, optical, X-ray and gamma-ray fluxes and object types for 651
blazars uniformly distributed in the sky. The second catalog gives the
same information about 336 manually selected confirmed BL Lac type
objects uniformly distributed in the sky.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 128 651 Isotropic set of 651 blazer-like objects
table2.dat 105 336 Set of 336 BL Lacs
--------------------------------------------------------------------------------
See also:
IX/67 : Incremental Fermi LAT 4th source cat. (4FGL-DR3) (Fermi-LAT col., 2020)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Name J2000 name (JHHMM+DDMM)
12- 28 A17 --- FERMIname Name from 4FGL Fermi catalog
(4FGL_JHHMM.m+DDMM)
30- 52 A23 --- X-rayname Name from X-ray catalog
54- 62 F9.5 deg RAdeg Right Ascension (J2000)
64- 72 F9.5 deg DEdeg Declination (J2000)
74- 80 F7.3 Jy FRadio Radio flux in x-band (8GHz) from
Radio Fundamental Catalogue
82- 92 E11.5 1/cm2/s1 FGamma ?=-1 Gamma flux from 4FGL Fermi catalog
94-105 E12.6 mW/m2 FXray ?=-1 X-ray flux from corresponding
X-ray catalog
107-111 F5.2 mag Gmag Corrected visual magnitude in
Gaia G-band filter
113-128 A16 --- Type Type of object
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Name J2000 name (JHHMM+DDMM)
12- 23 A12 --- FERMIname Name from 4FGL Fermi catalog
(4FGL_JHHMM.m+DDMM)
25- 47 A23 --- X-rayname Name from X-ray catalog
49- 57 F9.5 deg RAdeg Right Ascension (J2000)
59- 67 F9.5 deg DEdeg Declination (J2000)
69- 74 F6.3 Jy FRadio ?=-1 Radio flux in x-band (8GHz) from
Radio Fundamental Catalogue
76- 86 E11.5 1/cm2/s1 FGamma ?=-1 Gamma flux from 4FGL Fermi catalog
88- 99 E12.6 mW/m2 FXray ?=-1 X-ray flux from corresponding
X-ray catalog
101-105 F5.2 mag Gmag Corrected visual magnitude in Gaia
G-band filter
--------------------------------------------------------------------------------
Acknowledgements:
Maria Kudenko, kudenko.ma19(at)physics.msu.ru
(End) Maria Kudenko [INR, Russia], Patricia Vannier [CDS] 31-Mar-2024