Other
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541018e&link_type=abstract
American Astronomical Society, AAS Meeting #215, #410.18; Bulletin of the American Astronomical Society, Vol. 42, p.237
Other
Scientific paper
We present observations with the Green Bank Telescope (GBT) of neutral hydrogen (HI) 21 cm emission from two gravitationally lensed galaxies behind the cluster Abell 773. If detected, these galaxies would be twice as distant as the previously most distant detected HI emission at z 0.2. The unique alignment of the galaxies with the cluster provides magnification of the sources due to gravitational lensing and coupled with the sensitivity, frequency coverage, and location of GBT in the National Radio Quiet Zone makes these observations feasible. The target galaxies have redshifts of 0.398 and 0.487 with magnifications of 2.7 and 3.7, respectively. Our observations will have a 5-sigma HI mass sensitivity of 5x109 solar masses for a velocity width of 130 km/s. One of the challenges of this project was the RFI removal. The data has suffered mostly from bright narrowband interference and in some cases broadband interference. Several RFI removal algorithms were used to remove the interference. The results of this project, clipping and mean comparison algorithms will be discussed in detail. Combined with future observations of other systems at similar redshifts, we can begin to do SKA science today.
Edel Stanislav
Pisano Daniel J.
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