J/ApJ/525/127 RGB sample of BL Lacertae objects (Laurent-Muehleisen+, 1999)
The RGB sample of intermediate BL Lacertae objects
Laurent-Muehleisen S.A., Kollgaard R.I., Feigelson E.D., Brinkmann W.,
Siebert J.
<Astrophys. J. 525, 127 (1999)>
=1999ApJ...525..127L 1999ApJ...525..127L
ADC_Keywords: BL Lac objects ; Galaxies, radio ; Surveys ; X-ray sources
Keywords: BL Lacertae objects: general - galaxies: active - radio continuum:
galaxies - surveys - X-rays: galaxies
Abstract:
Combining newly identified and previously known BL Lacertae objects
from the ROSAT All-Sky Survey-Green Bank (RGB) catalog, we present a
sample of 127 BL Lacertae objects, the largest ever derived from a
single uniform survey. A complete sample of 33 objects brighter than
O=18.0 mag is also presented. These samples are compared to other
known BL Lac samples and are generally found to exhibit properties
intermediate between those of the previously disparate classes of
high- and low-energy-peaked BL Lacertae objects (HBLs and LBLs,
respectively). This result is most dramatic in the distribution of the
X-ray to radio logarithmic flux ratios, where the RGB BL Lacertae
objects are shown to peak precisely where the sharp dichotomy between
the two subclasses was previously seen.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 128 127 RGB BL Lac Source Properties
refs.dat 86 24 References to table2.dat
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Object ROSAT-Green Bank Survey name
16- 17 A2 --- f_Name [bc ] Flag on Name (1)
19 A1 --- Sample [S] Indicates part of the sample but not a
definitive BL Lac object
21- 38 A18 --- OName Other name
40- 41 I2 h RAh Right ascension (J2000)
43- 44 I2 min RAm Right ascension (J2000)
46- 50 F5.2 s RAs Right ascension (J2000)
51 A1 --- DE- Declination sign
52- 53 I2 deg DEd Declination (J2000)
55- 56 I2 arcmin DEm Declination (J2000)
58- 61 F4.1 arcsec DEs Declination (J2000)
63 A1 --- l_SCore Limit on SCore
64- 67 I4 mJy SCore 5Ghz radio flux of the core
69- 74 F6.2 10-12mW/m2 XFlux X-ray flux in the ROSAT 0.1-2.4 keV band
(in units of 10-12 ergs/cm2/s)
76- 79 F4.1 mag Omag Optical magnitude from the Palomar
Observatory Sky Survey I
82- 83 A2 --- f_Omag [ad] Flag on the optical magnitudes (2)
88- 91 F4.2 --- Sp-Index ? X-ray spectral energy index
93 A1 --- l_Sp-Index Limit on Sp-Index
94- 97 F4.2 --- Sp-IndexRO Radio - Optical spectral index
99-102 F4.2 --- Sp-IndexXO Optical - X-ray spectral index
104 A1 --- l_z Limit on z
105-110 F6.4 --- z ? Redshift
111 A1 --- n_z [ef] Notes on z (3)
113 A1 --- u_z [?] Indicates an uncertain redshift
measurement
115-132 A18 --- r_Name Reference numbers to the data in table
(see refs.dat)
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Note (1):
b = ID Uncertain; see Table 3
c = From low radio resolution sample
Note (2):
a = Optical magnitude converted from another band to equivalent O mag
(αopt = 1.0); see Table 3
d = Optical magnitude corrected to include AGN component only
Note (3):
e = New redshift from E. S. Perlman, J. F. Schachter, & J. T. Stocke 1998,
private communication
f = Redshift of 0.135 reported in Nass et al. (1996A&A...309..419N 1996A&A...309..419N) is
incorrect (N. Bade 1998, private communication)
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- RefNum Reference number from table2.dat
4- 22 A19 --- BibCode Reference Bibcode
26- 95 A70 --- Text References to table2.dat
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History:
From the ApJ electronic edition
(End) Greg Schwarz [AAS] 16-Mar-2000