Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2012-01-27
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
43 pages, 8 figures, submitted to ApJ
Scientific paper
We have developed a new needlet based method to detect point sources in cosmic microwave background (CMB) maps and have applied it to the WMAP 7 year data. We use both the individual frequency channels as well as internal templates, the difference between pairs of frequency channels, with the advantage that the CMB component is eliminated. Using the area of the sky outside the Kq85 galactic mask, we detect a total of 2102 point sources at the $5\sigma$ level in either the frequency maps or the internal templates. Of these, 1116 are detected either at $5\sigma$ directly in the frequency channels or at $5\sigma$ in the internal templates and $\geq3\sigma$ at the corresponding position in the frequency channels. Of the 1116 sources, 603 are detections which have not been reported so far in WMAP data. We have made a catalogue of these sources available with position and flux estimated in the WMAP channels where they are seen. In total, we identified 1029 of the 1116 sources with counterparts at 5GHz and 69 at other frequencies.
Hansen Frode K.
Marinucci Domenico
Scodeller Sandro
No associations
LandOfFree
Detection of new point sources in WMAP 7 year data using internal templates and needlets 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 Detection of new point sources in WMAP 7 year data using internal templates and needlets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of new point sources in WMAP 7 year data using internal templates and needlets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-345420