skybrightness plots for airmass, moonfraction, and moonangle, for matching pairs (close pairs) of gpc1 and isp data. Definition of a 'close pair' is with 240 seconds.

This search is from 2009-11-27 through 2010-03-01.

For gpc1, the selection criteria was to use exp_time > 25s, things that are not FLAT or DARK, background > 0, and only uses ota 33.

For isp, mostly the same criteria, the exp_time >= 3s, things that are not FLAT or DARK, background > 0, and class_id = 'fpa'.

Assumptions are that the bias for gpc1 is 7794 (for chip 33) and that the bias for isp is 836. This was done searching through the gpc1 and isp databases for darks and biases since 2009-12-01, and these seemed reasonable.

The ISP zeropoints used were recently calculated, and are located here: ISPZeroPoints The GPC1 zeropoints used are these: GPC_Zero_Points_July09

There is no g band plots here- there were no matching g pairs.

GPC1 = Black
ISP = RED

moon fraction plots (different band)

moon angle plots (different bands)

airmass plots (different bands)

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