J/other/Ap/67.1 Flat Spectrum Radio Quasars (FSRQ) cand. (Mickaelian+, 2024)
Classification of flat spectrum radio quasars by optical activity types.
Mickaelian A.M., Abrahamyan H.V., Paronyan G.M., Mikayelyan G.A.,
Sukiasyan A.G., Mkrtchyan V.K.
<Astrophysics, 67, 1-8 (2024)>
=2024Ap.....67....1M 2024Ap.....67....1M (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; Radio sources ; Photometry ; Optical ; Redshifts
Keywords: radio quasars - activity type - classification
Abstract:
We have carried out a spectral classification by the Activity Types
for a subsample of Blazars from the BZCAT v.5 Catalogue, namely the
Flat Spectrum Radio Quasars (FSRQ) candidates, designated in the
Catalogue as BZQ subtype objects. The classification is based on the
Sloan Digital Sky Survey (SDSS) homogeneous medium-resolution optical
spectroscopy and along with the standard BPT-type diagnostic diagrams,
we have applied our newly introduced fine classification scheme with
subtypes of Quasars and considering many more features. Out of 1909
BZQ objects, 618 having SDSS spectra were classified, resulting in 445
broad-line QSOs, 19 narrow-line QSOs, 138 broad-line Seyferts, 8
narrow-line Seyferts, and 2 Emission-line galaxies without a proper
classification. We have calculated the absolute magnitudes and
luminosities for all objects to distinguish QSOs from Seyferts, as
defined by the Catalogue of QSOs and Active Galaxies, -22.25m
separation limit. This way 148 objects changed their BZCAT subtypes
between BZQ to BZG, and also 6 BZQ objects to BZU.
Description:
BZCAT Flat Spectrum Radio Quasars (FSRQ) candidates.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
bzqtable.dat 106 618 Flat Spectrum Radio Quasars (FSRQ) candidates
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See also:
VII/274 : The Roma BZCAT - 5th edition (Massaro+, 2015)
J/A+A/495/691 : Multifrequency catalogue of blazars, Roma-BZCAT
(Massaro+ 2009)
J/other/Ap/66.11 : Optical classification of BZG objects (Abrahamyan+, 2023)
Byte-by-byte Description of file: bzqtable.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- BZQ Blazar name (BZQ) (5BZQJHHMM+DDMM)
17- 27 F11.7 deg RAdeg Right ascension (J2000), BZCAT v.5
29- 39 F11.7 deg DEdeg Declination (J2000), BZCAT v.5
41- 45 F5.2 mag rmag ? SDSS r magnitude
47- 52 F6.2 mag rMAG ? Absolute magnitude (SDSS r band)
54- 60 F7.5 --- z ? SDSS redshift
62- 67 A6 --- SDSS SDSS classification
69- 72 A4 --- VCV-13 VCV-13 classification
74- 99 A26 --- NED NED classification
101-106 A6 --- NewAT New activity type (DD1, DD2, DD3 and by eye)
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Acknowledgements:
Hayk Abrahamyan, abrahamyanhayk(at)gmail.com
(End) Patricia Vannier [CDS] 03-Aug-2024