Other
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...18711906l&link_type=abstract
American Astronomical Society, 187th AAS Meeting, #119.06; Bulletin of the American Astronomical Society, Vol. 27, p.1451
Other
Scientific paper
We present a well-defined sample of ~ 30 new BL Lacertae Objects discovered in the Rosat All-Sky Survey (RASS). This sample is the largest sample of X-ray--selected BL Lacertae Objects (XBLs) yet created from the RASS and increases the number of XBLs that were known prior to the Rosat mission by nearly 50%. The objects were discovered among the >2,000 sources with entries in both the RASS and GreenBank 5 GHz radio catalogs (Gregory & Condon 1991). Our followup high resolution VLA observations of these Rosat-GreenBank sources produced a database of subarcsecond positions and core radio fluxes which were correlated with POSS I plates, giving broadband radio, optical and X-ray colors. Following the method of Schachter et al. (1993), we concentrated our followup spectroscopic observations on objects with flat radio--optical and optical--X-ray spectral indices, although other objects were observed to assess biases in this selection criterion. All together 177 objects brighter than B ~ 18.5 were observed at low spectroscopic resolution. Approximately 60% of these sources are quasars, 15% are radio galaxies and 25% are BL Lacertae objects. We combine our newly discovered objects with previously known objects which match our selection criteria and present a well-defined sample of ~ 60 BL Lacertae objects. These BL Lacertae objects are presented on a LogN-LogS diagram and compared to previous results from other surveys and the implications for beaming models and cosmic evolution are discussed. Gregory & Condon, 1991, ApJS, 75, 1011 Schachter, et al. ApJ, 412, 541
No associations
LandOfFree
A New Sample of X-ray--Selected BL Lacertae Objects and Implications for Unified Schemes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A New Sample of X-ray--Selected BL Lacertae Objects and Implications for Unified Schemes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A New Sample of X-ray--Selected BL Lacertae Objects and Implications for Unified Schemes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1257056