Optical Observations (HST)

The HST-WFPC2 observed PKS 2354-35 on 2001 April 19 as part of snapshot proposal 8683 (PI: R. van der Marel). The observations were performed in the F814W (broad I) band and the exposure time was 500 seconds, split into two to allow the elimination of cosmic rays. The HST data were retrieved from the public archive and combined using the IRAF/STSDAS task MKDARK, which also allows the elimination of cosmic rays. The data were then rotated to a north-up orientation using the IRAF task IMLINTRAN and registered using WCS information in the header. We examined both the high-resolution ($0.0455''$/pix) PC image (on which the host galaxy of PKS 2454-35 lies) as well as the four-chip mosaic, which was assembled at $0.09965''$/pix using the IRAF/STSDAS task WMOSAIC.