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Table of Contents
Non-Bruce GRB Instrumentation Information
Launches
You can find information on Scheduled Space Launches on this page: http://www.satelliteonthenet.co.uk/index.php/2015
Swift
Swift BAT
BAT info on a separate page
Swift UVOT
UVOT Photometry
The Swift UVOT Users's guide http://swift.gsfc.nasa.gov/analysis/UVOT_swguide_v2_2.pdf, P. 76 says, “ look at http://heasarc.gsfc.nasa.gov/docs/heasarc/caldb/swift/docs/uvot/” for integrated PSFs.
UVOT Users guide p. 152 says to use radius=3“ apertures: “In general faint point sources should use circular apertures with a radius that maximizes the signal-to-noise ratio in the aperture. This is typically about 3 arcsec.”
UVOT W band PSF is FWHM = 2.37 ” http://heasarc.gsfc.nasa.gov/docs/heasarc/caldb/swift/docs/uvot/uvot_caldb_psf_02.pdf THERE IS AN IMPORTANT TRICK FOR CALDB: the curve-of-growth is normalized at 5“; ALL FLUX is really about 115% for W, not 100%.
Photometric Calibration of W band
http://heasarc.gsfc.nasa.gov/docs/heasarc/caldb/swift/docs/uvot/uvot_caldb_counttofluxratio_10wa.pdf describes the calibration of UVOT filters.
Their procedure calculates the flux-weighted effective wavelength of vega (3470Å); then calculates ratios of expected count rate for f_nu~ nu^+2 spectrum; (I use index= +0.75). They give a “count rate to flux ratio” for various indices and extinctions of 2.6 to 4.4e-17. I just assume use 3.5e-17. They give errors on this of > 10%.
