J/MNRAS/329/877 The CLASS blazar survey. II. (Caccianiga+, 2002)
The CLASS blazar survey. - II. Optical properties.
Caccianiga A., Marcha M.J., Anton S., Mack K.-H., Neeser M.J.
<Mon. Not. R. Astron. Soc. 329, 877 (2002)>
=2002MNRAS.329..877C 2002MNRAS.329..877C
ADC_Keywords: BL Lac objects ; QSOs ; Redshifts ; Magnitudes
Keywords: surveys - galaxies: active - BL Lacertae objects: general -
quasars: general
Abstract:
This paper presents the optical properties of the objects selected in
the CLASS blazar survey. Because an optical spectrum is now available
for 70 per cent of the 325 sources present in the sample, a spectral
classification, based on the appearance of the emission/absorption
lines, is possible. A wide variety of optical spectral types is found.
Besides `classical' BL Lacs (42), BL Lac candidates (5) and high-power
(P5GHz>1026W/Hz) flat spectrum radio quasars (67), a significant
number of `passive' elliptical galaxies (41) is also found. Moreover,
33 broad emission line objects with a low radio power
(P(5GHz)>1026W/Hz) are discovered, suggesting that at least a
fraction (∼24-30 per cent) of low-power blazars have a broad line
region. Finally, 34 objects showing only narrow emission lines, either
as a result of some starburst activity in the host galaxy or as a
result of the presence of an active galactic nucleus, appear in the
sample.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 81 237 Identified CLASS sources
notes.dat 80 341 Individual notes
--------------------------------------------------------------------------------
See also:
VIII/40 : GB6 catalog of radio sources (Gregory+ 1996)
J/MNRAS/326/1455 : The CLASS blazar survey. I. (Marcha+, 2001)
J/MNRAS/348/937 : The CLASS blazar survey. III. (Caccianiga+, 2004)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [GB6]
4- 17 A14 --- GB6 GB6 designation (Jhhmmss+ddmmss)
19- 38 A20 --- Name Other name
40- 41 A2 --- Type [012? ] Type of Blazar
43- 46 A4 --- Class Classificaiton (PEG, AGN star)
48- 53 F6.4 --- z ? Redshift
54 A1 --- u_z [?] Uncertainty flag on z
57- 61 F5.2 W/Hz logP1.4GHz ? 1.4GHz power
63- 68 F6.2 mag BMAG ? Absolute B magnitude
70- 77 A8 --- Obs Observation (Telescope and Date)
79- 81 I3 --- Note [1/237] Note detailed in "notes.dat" file
--------------------------------------------------------------------------------
Byte-by-byte Description of file: notes.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Note Note number
5- 80 A76 --- Text Text of the note (1)
--------------------------------------------------------------------------------
Note (1): Lines in absorption (abs.) and in emission (ems.) are listed for the
objects for which we have collected a spectrum.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 19-Mar-2002