Translator Disclaimer
Paper
18 August 2005 Temperature dependent calibration products of the SWIFT x-ray telescope
Author Affiliations +
Abstract
The X-Ray Telescope (XRT) on board the Swift satellite is a sensitive imaging spectrometer utilizing a MAT-22 CCD at the Focal plane. The system was designed to operate the CCD at -100 °C +/- 1 °C for the duration of the mission. Due to a failure of the temperature control sub-system, the CCD operates under variable thermal conditions dictated by the view factor of the radiator- heatpipe sub-system to the Earth and sun. A temperature variation of up to 5° C is seen during a single orbit due to the satellite transition from sun light into eclipse and the full operational regime of the instrument ranges from temperatures of -75°C to -45°C due to the persistent heating/cooling effects of satellite orientation to the sun and earth. To maintain the highest quality data products possible from the XRT data stream, a recalibration of the XRT is required to account for this variable thermal environment. We present the methodology for and results from a temperature dependent analysis of on-orbit XRT data, collected during the Swift commissioning phase, used to produce gain, bias and warm pixel calibration products. We also discuss the quality of XRT science products capable with these temperature dependent calibration files and future plans for updates to these calibration products.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David C. Morris, David N. Burrows, Joanne E. Hill, Jamie Kennea, Judith Racusin, Paul Wood, Chris Mangels, Robert Klar, Lorella Angelini, and Francesca Tamburelli "Temperature dependent calibration products of the SWIFT x-ray telescope", Proc. SPIE 5898, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIV, 58981N (18 August 2005); https://doi.org/10.1117/12.618019
PROCEEDINGS
9 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

Beowulf computational class in Wide-Field Astronomy
Proceedings of SPIE (December 13 2002)
Soft x ray response of the prototype CCD camera (XIS)...
Proceedings of SPIE (November 10 1998)
Resume of seven year MOS in orbit calibration events,...
Proceedings of SPIE (November 10 2003)
Readout modes and automated operation of the Swift X ray...
Proceedings of SPIE (February 03 2004)
The operation and evolution of the swift x-ray telescope
Proceedings of SPIE (September 13 2007)

Back to Top