filename: image.txt Date: 2002 Jul 16 originat: deh tlm: Subject: XJETS doc to go with M87 image. Leave blank those entries that do not apply. XJET IMAGE DESCRIPTOR DOCUMENT - - - filename should be identical to image except for .fits -> .txt ------------- cut here ------------------------------------------ FILENAME: m87aciss00jul.txt # src-detector-freq-date SOURCE: M87 IMAGE NAME: M87 ACIS-S # concise label for thumbnail OBSCODE: obsid 1808 # seq.#, obsid, or other useful number FILETYPE: fits primary array # change to 'uv' or 'events' if warranted ARRAY SIZE: 512 # single entry denotes a square array PIXEL SIZE: 0.123 # in arcsec DETECTOR: ACIS-S # include telescope/observatory e.g. Chandra/ACIS-S FREQUENCY: # include units OBSDATE: 2000jul30 # we prefer YYYYmmmdd, e.g. 2002jul22 OBSTIME: 12848s # append 's', 'm', or whatever units BEAMSIZE: 0.8 # arcsec: restoring beam for radio; # else smoothing Gaussian convolved with PRF ORIG. PI: A. Wilson CONTRIB. by: D. E. Harris COMMENTS: (describe any other helpful details about the image) ACIS chips 7 ('S3') was used with 1/8th subarray and a CCD readout time of 0.4s. The data were binned to 1/4 native pixel size (0.123") and smoothed with a Gaussian of FWHM=0.5".