Statistics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.9416c&link_type=abstract
American Astronomical Society Meeting 205, #94.16; Bulletin of the American Astronomical Society, Vol. 36, p.1498
Statistics
Scientific paper
The Hubble Ultra Deep Field was observed over a period of four months. We searched through the data in the i' and z' bands to find variable sources. The data was broken into 4 epochs of approximately equal exposure time, and photometry was performed in matched apertures defined from the full depth UDF images. The observed photometric error distribution between epochs is modelled and 3-4σ outliers are selected as candidates. We are searching for optical or rest-frame UV variability most likely due to AGN activity in the galaxies or perhaps the merging of two galaxies containing AGN. The statistics and photometric redshift distribution of the variable sources will be discussed in the context of galaxy mergers. With similar photometric stability and proper planning, this method could be used to find higher redshift galaxy mergers and/or AGN with JWST. This work is supported by HST grants AR10298.* and GO 9793.*, and NASA JWST grant NAG 5-12460.
Cohen Seth H.
Hathi Nimish P.
Koekemoer Anton M.
Malhotra Sagar
Mobasher Bahram
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