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VII/274 The Roma BZCAT - 5th edition (Massaro+, 2015)
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Beginning of ReadMe :VII/274 The Roma BZCAT - 5th edition (Massaro+, 2015)
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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
=2016yCat.7274....0M
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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