Physics
Scientific paper
Sep 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cxo..prop.1850c&link_type=abstract
Chandra Proposal ID #05508194
Physics
Chandra Proposal Id #05508194
Scientific paper
To better calibratate pile-up in ACIS imaging data, we need a set of observations of a faint point source with different frame times. The calibration team has been given approval by the CXC director and project science to observe the isolated pulsar PSR J0437-4715 with 5 different frame times. The ACIS-S3 count rate of this source is 0.2 ct/s and the five frame times will produce pile-up fractions of <1%, 5%, 10%, 20% and approximately 35%. The 5 msec pulsations os this source will not have an impact on the measurements.
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