Chandra HRC-S degapping corrections

Vinay L. Kashyap; Jeremy J. Drake; Sun Mi Chung

doi:10.1117/12.551790

11 October 2004 Chandra HRC-S degapping corrections

Vinay L. Kashyap, Jeremy J. Drake, Sun Mi Chung

Proceedings Volume 5488, UV and Gamma-Ray Space Telescope Systems; (2004) https://doi.org/10.1117/12.551790
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

The HRC-S is a microchannel plate detector on board Chandra and is primarily used for spectroscopic observations with the Low Energy Transmission Grating Spectrometer (LETGS) in place. Photons are detected via signals read out from evenly spaced wires underneath the plates and positions are computed by centroiding around the strongest amplifier signals. This process leads to gaps in between the taps where no events are placed. A deterministic correction is then made during ground processing to these event locations to remove the gaps. We have now developed a new, empirical degap corrections from flight data. We describe the procedure we use, present comparisons between the new degap and lab-data based degap, and investigate the temporal stability of the degap corrections.

Citation Download Citation

Vinay L. Kashyap, Jeremy J. Drake, and Sun Mi Chung "Chandra HRC-S degapping corrections", Proc. SPIE 5488, UV and Gamma-Ray Space Telescope Systems, (11 October 2004); https://doi.org/10.1117/12.551790

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