VII/274 The Roma BZCAT - 5th edition (Massaro+, 2015)
The 5th edition of the Roma-BZCAT.
Massaro E., Maselli A., Leto C., Marchegiani P., Perri M., Giommi P.,
Piranomonte S.
<Astrophys. Space Sci., 357, 75 (2015)>
=2015Ap&SS.357...75M 2015Ap&SS.357...75M
=2016yCat.7274....0M 2016yCat.7274....0M
ADC_Keywords: QSOs ; BL Lac objects ; Galaxy catalogs ; Redshifts ; Photometry
Keywords: BL Lacertae objects: general - galaxies: quasars: general - catalogs
Abstract:
The Roma-BZCAT is now at the 5th Edition which contains coordinates
and multi-frequency data of 3561 sources, about 30% more than in the
1st edition, either confirmed blazars or exhibiting characteristics
close to this type of sources. With respect to the previous editions,
this new edition has relevant changes in the sources' classification
and has a new format for the notes in the tables. We emphasize that
all the sources in the Roma-BZCAT have a detection in the radio
band. Moreover, a complete spectroscopic information is published
and could be accessed by us for all of them, with the exception of BL
Lac candidates. Consequently, peculiar sources as the so called
"radio quiet BL Lacs", which are reported in some other
catalogues, are not included here because of possible contamination
with hot stars and other extragalactic objects.
Description:
In the 5th Edition we use similar denomination of
blazars adopted in the previous editions. Each blazar
is identified by a code, with 5BZ for all blazars, a fourth
letter that specifies the type (B, G, Q or U), followed by the
truncated equatorial coordinates (J2000). We introduced the edition
number before the letters BZ to avoid possible confusion due to the
fact that several sources changed their old names because of the new
adopted classification.
The codes are defined in the "Note (G1)" below.
The 5th edition contains 1151 BZB sources, 92 of which are reported as
candidates because we could not find their optical spectra in the
literature, 1909 BZQ sources, 274 BZG sources and 227 BZU objects
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
bzcat5.dat 133 3561 The Roma BZCAT - 5th edition
--------------------------------------------------------------------------------
See also:
J/A+A/495/691 : Multifrequency catalogue of blazars, Roma-BZCAT (Massaro+ 2009)
http://www.asdc.asi.it/bzcat : BZCAT Home Page
Byte-by-byte Description of file: bzcat5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Seq Sequential number
6- 20 A15 --- Name Source name (based on J2000 position),
5BZA JHHMM+DDMM (G1)
22- 23 I2 h RAh Right ascension (J2000.0)
25- 26 I2 min RAm Right ascension (J2000.0)
28- 32 F5.2 s RAs Right ascension (J2000.0)
34 A1 --- DE- Declination sign (J2000.0)
35- 36 I2 deg DEd Declination (J2000.0)
38- 39 I2 arcmin DEm Declination (J2000.0)
41- 45 F5.2 arcsec DEs Declination (J2000.0)
47- 52 F6.2 deg GLON Galactic longitude
54- 59 F6.2 deg GLAT Galactic latitude
61- 65 F5.3 --- z Redshift
66 A1 --- u_z [?] uncertainty flag on z
68- 71 F4.1 mag Rmag ?=0 R magnitude
73- 96 A24 --- Class Source classification
98-105 F8.1 mJy FR ?=0 Flux density at 1.4/0.843GHz
107-111 I5 mJy F143 ?=0 Flux density at 143GHz
113-118 F6.2 fW/m2 FX ?=0 X-ray flux 0.1-2.4keV
120-126 E7.3 cm2/s FF ?=0 Fermi flux1-100GeV (in ph/cm2/s)
128-133 F6.3 --- aro Spectral index radio-optical
--------------------------------------------------------------------------------
Global Notes:
Note (G1): The classifications are:
5BZB = BL Lac objects, used for AGNs with a featureless optical
spectrum, or having only absorption lines of galaxian origin and weak
and narrow emission lines;
5BZG = sources, usually reported as BL Lac objects in the literature,
but having a spectral energy distribution (SED) with a significant
dominance of the galaxian emission over the nuclear one
5BZQ = Flat Spectrum Radio Quasars, with an optical spectrum showing
broad emission lines and dominant blazar characteristics;
BZU = blazars of Uncertain type, adopted for a small number of sources
having peculiar characteristics but also exhibiting blazar activity:
for instance, occasional presence/absence of broad spectral lines or
other features, transition objects between a radio galaxy and a BL
Lac, galaxies hosting a low luminosity blazar Nucleus, etc.
--------------------------------------------------------------------------------
History:
Copied at http://www.asdc.asi.it/bzcat
(End) Patricia Vannier [CDS] 11-Feb-2016