325-MHz observations of the ELAIS-N1 field using the Giant Metrewave Radio Telescope

Details 325-MHz observations of the ELAIS-N1 field using the Giant Metrewave Radio Telescope 325-MHz observations of the ELAIS-N1 field using the Giant Metrewave Radio Telescope

2008-12-03

arxiv.org/abs/0812.0813v1

Astronomy and Astrophysics

Astrophysics

The paper contains 15 figures and 5 tables. Accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2009.14317.x

We present observations of the European Large-Area {\it ISO} Survey-North 1 (ELAIS-N1) at 325 MHz using the Giant Metrewave Radio Telescope (GMRT), with the ultimate objective of identifying active galactic nuclei and starburst galaxies and examining their evolution with cosmic epoch. After combining the data from two different days we have achieved a median rms noise of $\approx40 \mu$Jy beam$^{-1}$, which is the lowest that has been achieved at this frequency. We detect 1286 sources with a total flux density above $\approx270 \mu$Jy. In this paper, we use our deep radio image to examine the spectral indices of these sources by comparing our flux density estimates with those of Garn et al. at 610 MHz with the GMRT, and surveys with the Very Large Array at 1400 MHz. We attempt to identify very steep spectrum sources which are likely to be either relic sources or high-redshift objects as well as inverted-spectra objects which could be Giga-Hertz Peaked Spectrum objects. We present the source counts, and report the possibility of a flattening in the normalized differential counts at low flux densities which has so far been reported at higher radio frequencies.

Affiliated with

Also associated with

No associations

Rating

325-MHz observations of the ELAIS-N1 field using the Giant Metrewave Radio Telescope 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 325-MHz observations of the ELAIS-N1 field using the Giant Metrewave Radio Telescope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 325-MHz observations of the ELAIS-N1 field using the Giant Metrewave Radio Telescope will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-135290