J/A+A/495/691 Multifrequency catalogue of blazars, Roma-BZCAT (Massaro+, 2009)
Roma-BZCAT: a multifrequency catalogue of blazars.
Massaro E., Giommi P., Leto C., Marchegiani P., Maselli A., Perri M.,
Piranomonte S., Sclavi S.
<Astron. Astrophys., 495, 691-696 (2009)>
=2009A&A...495..691M 2009A&A...495..691M
ADC_Keywords: QSOs ; BL Lac objects ; Galaxy catalogs ; Redshifts ; Photometry
Keywords: BL Lacertae objects: general - galaxies: quasars: general - catalogs
Abstract:
We present a new catalogue of blazars based on multifrequency surveys
and on an extensive review of the literature. Blazars are classified
as BL Lacertae objects, as flat spectrum radio quasars or as blazars
of uncertain/transitional type. Each object is identified by a root
name, coded as BZB, BZQ and BZU for these three subclasses
respectively, and by its coordinates. This catalogue is being built as
a tool useful for the identification of the extragalactic sources that
will be detected by present and future experiments for X and gamma-ray
astronomy, like Swift, AGILE, Fermi-GLAST and Simbol-X. An electronic
version is available from the ASI Science Data Center web site at
http://www.asdc.asi.it/bzcat.
Description:
The Roma-BZCAT is structured in two parts. Part 1, at present the only
one available on-line, contains the lists of blazars, which are
classified in three main groups, according to their spectral
properties. Each blazar is identified by a three-letter code, where
the first two are BZ for blazar and the third one specifies the type,
followed by the truncated equatorial coordinates (J2000).
The codes are defined in the "Note (G1)" below.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
bzcat1.dat 106 2837 Multi-frequency catalogue of blazars (Roma-BZCAT)
Version 1.0 (2009-November)
bzcat4.dat 92 3149 Multi-frequency catalogue of blazars (Roma-BZCAT)
Version 4.1.1 (2012-August)
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Byte-by-byte Description of file: bzcat1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq Sequential number
6- 18 A13 --- Name Source name (based on J2000 position)
20- 21 I2 h RAh Right ascension (J2000.0)
23- 24 I2 min RAm Right ascension (J2000.0)
26- 29 F4.1 s RAs Right ascension (J2000.0)
31 A1 --- DE- Declination sign (J2000.0)
32- 33 I2 deg DEd Declination (J2000.0)
35- 36 I2 arcmin DEm Declination (J2000.0)
38- 41 F4.1 arcsec DEs Declination (J2000.0)
43- 47 F5.3 --- z Redshift
49- 52 F4.1 mag Rmag ?=99. R magnitude
54- 56 A3 --- Class Source classification (G1)
84- 90 F7.1 mJy FR Radio flux, from NVSS or SUMSS (2)
92- 98 F7.3 fW/m2 FX X-ray flux (in 10-12erg/cm2/s)
100-101 A2 --- u_z [?] Comment (uncertainty) on redshift
103-104 A2 --- n_Rmag Comment on Rmag (other band)
106 A1 --- r_FR [fpsw] Origin of radio flux (2)
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Note (2): Frequencies are from:
* f = FIRST: 1.4GHz (Cat. VIII/71)
* s = SUMSS: 843MHz (Cat. VIII/81)
* p = PMN: 5GHz (Cat. VIII/38)
* w = PKSCAT: 1.41GHz (Cat. VIII/15)
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Byte-by-byte Description of file: bzcat4.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1-3419] Sequential number
6- 18 A13 --- Name Source name (based on J2000 position)
20- 21 I2 h RAh Right ascension (J2000.0)
23- 24 I2 min RAm Right ascension (J2000.0)
26- 29 F4.1 s RAs Right ascension (J2000.0)
31 A1 --- DE- Declination sign (J2000.0)
32- 33 I2 deg DEd Declination (J2000.0)
35- 36 I2 arcmin DEm Declination (J2000.0)
38- 41 F4.1 arcsec DEs Declination (J2000.0)
43- 47 F5.3 --- z Redshift
48- 49 A2 --- u_z [ >?] Uncertainty flag on Redshift
51- 54 F4.1 mag Rmag ? R-band magnitude
56- 58 A3 --- Class Source classification (G1)
60- 66 F7.1 mJy F1.4 Radio flux 1.4GHz (from NVSS or SUMSS)
68- 74 F7.1 mJy F143 Radio flux 143GHz
76- 82 F7.3 fW/m2 FX X-ray flux 0.1-2.4keV (in 10-12erg/cm2/s)
84- 92 E9.2 ph/cm2/s Fgam γ-ray flux 1-100GeV (Fermi)
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Global Notes:
Note (G1): the classifications are:
BZB = BL Lac objects, used for AGNs with a featureless optical
spectrum or only with absorption lines of galaxian origin and
weak and narrow emission lines;
BZ? = BL Lac candidates
BZQ = flat-spectrum radio quasars, with an optical spectrum showing
broad emission lines and dominant blazar characteristics;
BZU = blazars of uncertain type, adopted for sources with peculiar
characteristics but also showing blazar activity: for instance,
occasional presence/absence of broad spectral lines or features,
transition objects between a radio galaxy and a BL Lac, galaxies
hosting a low luminosity blazar nucleus, etc.;
History:
* 19-Nov-2009: Version 2837 sources (file bzcat1.dat)
copied at http://www.asdc.asi.it/bzcat/
* 29-Aug-2013: Version 3149 sources (V4.1.1)
copied V4.1.1 from http://www.asdc.asi.it/bzcat/
The unexplained flags for the redshift "el" (BZBJ1231+1421)
or "cl" (BZBJ1234-3856) where ignored.
(End) Patricia Vannier, Francois Ochsenbein [CDS] 29-Aug-2013