CalFUSE converts wavelengths to a heliocentric reference frame. Does it convert the exposure start and stop times (EXPSTART and EXPEND) to a heliocentric frame as well?

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CalFUSE converts wavelengths to a heliocentric reference frame. Does it convert the exposure start and stop times (EXPSTART and EXPEND) to a heliocentric frame as well?

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No. CALFUSE does not convert the exposure start and stop times to a heliocentric frame of reference. The header keywords EXPSTART and EXPEND are genuine geocentric modified Julian dates, i.e., Julian dates with 2400000.5 subtracted.

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