Radio-loud ROSAT sources near the North Ecliptic Pole

Details Radio-loud ROSAT sources near the North Ecliptic Pole Radio-loud ROSAT sources near the North Ecliptic Pole

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26as..134..221b&link_type=abstract

Astronomy and Astrophysics Supplement, v.134, p.221-240

Astronomy and Astrophysics

Astrophysics

7

Galaxies: Active, Clusters: General, Quasars: General, X-Rays: General, Radio Continuum: Galaxies

Scientific paper

A deep and large-area survey of the North Ecliptic Pole region was made with the ROSAT All-Sky Survey and the VLA to elucidate the population of radio-loud extragalactic objects. A region of 29.3 square degrees was surveyed with sensitivities around 5 \ 10(-14) erg s(-1) cm(-2) in the soft X-ray band and 1 mJy at 1.5 GHz. Optical counterparts were sought on digitized Schmidt plates from POSS-I and II. Seventy-four reliable RASS-VLA sources were found. The sample is a heterogeneous mixture of Seyfert galaxies, quasars, BL Lac objects, galaxy clusters and groups containing a radio galaxy. Optical magnitudes range from B =~ 14 to B > 22. Three results are noteworthy: (1) the bimodality in the ratio of radio to optical emission seen in optically- and X-ray-selected AGN samples is also evident in the ROSAT-VLA objects; (2) X-ray and radio selection is an effective method for locating poor galaxy clusters and groups; and (3) a considerable population of optically faint but X-ray/radio-bright objects is present. This last group may be either distant clusters with radio galaxies or ``red quasars".

Affiliated with

Also associated with

No associations

Rating

Radio-loud ROSAT sources near the North Ecliptic Pole 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 Radio-loud ROSAT sources near the North Ecliptic Pole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio-loud ROSAT sources near the North Ecliptic Pole will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1184136