Computer Science
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ycat..73950269s&link_type=abstract
VizieR On-line Data Catalog: J/MNRAS/395/269. Originally published in: 2009MNRAS.395..269S
Computer Science
Surveys, Galaxies: Radio
Scientific paper
We present observations of the European Large-Area ISO Survey-North 1 (ELAIS-N1) at 325MHz 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 ~40uJy/beam, which is the lowest that has been achieved at this frequency. We detect 1286 sources with a total flux density above ~270uJy. 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. 2008 (Cat. J/MNRAS/383/75) at 610MHz with the GMRT, and surveys with the Very Large Array at 1400MHz. 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.
(1 data file).
Dennefeld Michel
Dole Herve
Ricquebourg F.
Roland Jérémie
Saikia D. J.
No associations
LandOfFree
ELAIS-N1 field 325MHz observations (Sirothia+, 2009) 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 ELAIS-N1 field 325MHz observations (Sirothia+, 2009), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ELAIS-N1 field 325MHz observations (Sirothia+, 2009) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-982894