HR: 09:30h
AN: SH11A-07    [Abstracts]
TI: Systematic Error Reduction and Photometric Calibration for the Solar Mass Ejection Imager (SMEI)
AU: * Buffington, A
EM: abuffington@ucsd.edu
AF: Univ. California San Diego, Center for Astrophysics and Space Sciences, 9500 Gilman Drive, La Jolla, CA 92093 United States
AU: Jackson, B V
EM: bvjackson@ucsd.edu
AF: Univ. California San Diego, Center for Astrophysics and Space Sciences, 9500 Gilman Drive, La Jolla, CA 92093 United States
AU: Hick, P
EM: pphick@ucsd.edu
AF: Univ. California San Diego, Center for Astrophysics and Space Sciences, 9500 Gilman Drive, La Jolla, CA 92093 United States
AB: The Solar Mass Ejection Imager (SMEI) instrument provides white-light photometric maps covering most of the sky each orbit of the Coriolis spacecraft. The SMEI differential photometry specification is 0.1% for each 1 square degree sky bin. A labyrinthine baffle reduces scattered sunlight, but for a portion of the data a background residue must also be subtracted to finally reach this specification. We describe this process, and further discuss how bright stars are used to determine an appropriate conversion from the CCD-camera data units to sky surface brightness. Also, the CCD in the camera viewing closest to the Sun operates significantly warmer than expected, which gives rise to a changing population of "hot pixels". We describe a data-analysis process which significantly alleviates the photometric impact of this.
UR: http://cassfos02.ucsd.edu/solar/smei\_new/index.html
DE: 7513 Coronal mass ejections
DE: 7594 Instruments and techniques
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2004 AGU Fall Meeting