|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'500'096
Articles rated: 2609
18 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
The FIRST Bright QSO Survey | | Michael D. Gregg
; Robert H. Becker
; Richard L. White
; David J. Helfand
; Richard G. McMahon
; Isobel M. Hook
; | | Date: |
25 Apr 1996 | | Subject: | astro-ph | | Affiliation: | IGPP/LLNL), Robert H. Becker (UC Davis), Richard L. White (STScI), David J. Helfand (Columbia), Richard G. McMahon (Cambridge), Isobel M. Hook (UC Berkeley | | Abstract: | The FIRST Radio Survey provides a new resource for constructing a large quasar sample. With source positions accurate to better than 1arcsec and a point source sensitivity limit of 1 mJy, it reaches 50 times deeper than previous radio catalogs. We report here on the results of the pilot phase for a FIRST Bright Quasar Survey (FBQS). Based on matching the radio catalog from the initial 300 deg$^2$ of FIRST coverage with the optical catalog from the Automated Plate Machine (APM) digitization of Palomar Sky Survey plates, we have defined a sample of 219 quasar candidates brighter than E = 17.50. We have obtained optical spectroscopy for 151 of these and classified 25 others from the literature, yielding 69 quasars or Seyfert~1 galaxies, of which 51 are new identifications. The brightest new quasar has an E magnitude of 14.6 and z = 0.91; four others are brighter than E = 16. The redshifts range from z=0.12 to 3.42. Half of the detected objects are radio quiet with L$_{
m 21cm} < 10^{32.5}$ ergs/s. We use the results of this pilot survey to establish criteria for the FBQS that will produce a quasar search program which will be 70efficient and 95complete to a 21-cm flux density limit of 1.0 mJy. | | Source: | arXiv, astro-ph/9604148 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER