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. =2015Ap&SS.357...75M =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