FOS Instrument Science Report 091

"A Rough Photometric Calibration for FOS,BLUE,G160L,ORDER0"
by Keith Horne and Michael Eracleous

Abstract excerpted from the report:
	The HST's FOS, BLUE, G160L mode is of special interest for studying
	rapid variations simultaneously using the 1st order reflection for
	ultraviolet spectroscopy and 0th order reflection for "white light"
	photometry.  When using the onboard tape recorder to record a long
	time series, the time resolution has been set as high as 6.18s for 
	FOS spectra in the "1/4-stepping" mode (4 pixels per Digicon diode),
	or 3.2s in the 1/2 stepping mode (2 pixels per diode).  The
	G160L grating reflects Lyman alpha 1216A light onto the Blue
	Digicon detector at pixels 630,1225, and 2020 in orders 0, 1,
	and 2 respectively (for observations made in the 1/4 stepping
	mode).