Spectral characteristics and variability of radio sources near the north celestial pole

Details Spectral characteristics and variability of radio sources near the north celestial pole Spectral characteristics and variability of radio sources near the north celestial pole

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009arep...53..487m&link_type=abstract

Astronomy Reports, Volume 53, Issue 6, pp.487-500

Astronomy and Astrophysics

Astronomy

Radio Sources

Scientific paper

We present the results of our observations of compact extragalactic radio sources near the north celestial pole (+75° ≤ δ ≤ +88°) obtained on the RATAN-600 radio telescope. Our sample consists of 51 radio sources with spectra that are either flat or inverted (growing toward shorter wavelengths) and with flux densities at 1.4 GHz S ν ≥ 200 mJy. We observed the sources at 1-21.7 GHz. Multi-frequency instantaneous spectra are presented for 1999-2007. We observed 33 of our sample source daily for 30 days in August 2007. As a result, we revealed 15 objects exhibiting rapid variations on time scales of a day. The multi-frequency instantaneous spectra of these sources indicate that radio flux variations on one-day timescales are characteristic of objects of various spectral types. More than half the sources exhibiting rapid variations demonstrate a growth in the variability amplitude with increasing frequency. For some of the objects, the variability amplitude is virtually independent of frequency.

Affiliated with

Also associated with

No associations

Rating

Spectral characteristics and variability of radio sources near the north celestial 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 Spectral characteristics and variability of radio sources near the north celestial pole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectral characteristics and variability of radio sources near the north celestial pole will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-776804