PSP QA for run 2864, rerun 0

QA produced on Thu Jan 17 19:42:26 CST 2002 with photo version v5_2_27

	Field Quality (nFields=248)
quality	nOK	nHOLE	% HOLE
union	246	2	0.8
col. 1	247	1	0.4
col. 2	248	0	0.0
col. 3	248	0	0.0
col. 4	246	2	0.8
col. 5	248	0	0.0
col. 6	248	0	0.0

PSP status plot

PSF width (FWHM arcsec) statistics for column 6, filter r:
Mean PSF width = 1.27
Median = 1.21, min = 0.91, max = 2.14
There are 0 fields ( 0.0%) with PSFwidth > 4.0 arcsec
This run is 248 fields long.
PSF width plot for all 30 chips
PSF width derivative plot for all 30 chips

	Mean PSP status (0=OK)
band	u	g	r	i	z
col. 1	0.00	0.01	0.01	0.03	0.01
col. 2	0.00	0.01	0.00	0.03	0.00
col. 3	0.01	0.02	0.04	0.14	0.01
col. 4	0.00	0.01	0.03	0.10	0.00
col. 5	0.00	0.01	0.03	0.08	0.02
col. 6	0.00	0.01	0.02	0.06	0.00

PSP status plot

	Mean N stars for estimating PSF
band	u	g	r	i	z
col. 1	49.1	39.3	37.7	38.1	51.3
col. 2	47.4	37.7	38.7	37.0	50.2
col. 3	47.3	36.7	37.3	32.3	48.8
col. 4	49.0	37.4	37.1	32.1	52.2
col. 5	48.1	38.0	33.7	35.5	47.9
col. 6	47.3	39.9	39.7	35.7	51.4

Number of stars used for estimating PSF

	Mean m(psf)-m(aperture) Error (mag)
band	u	g	r	i	z
col. 1	0.02	0.02	0.02	0.02	0.02
col. 2	0.02	0.02	0.02	0.02	0.02
col. 3	0.02	0.02	0.02	0.02	0.03
col. 4	0.02	0.02	0.02	0.02	0.02
col. 5	0.02	0.02	0.02	0.02	0.02
col. 6	0.02	0.02	0.02	0.02	0.02

Aperture Correction Scatter plot
Aperture Correction Bias plot
Wing Aperture Correction plot
Power-law index for the outer PSF
Kolmogoroff exponents

*Averaged over 6 columns

	Sky brightness* (mag/arsec2)
band	u	g	r	i	z
mean	22.61	22.07	21.07	20.27	19.07
max	22.74	22.23	21.14	20.30	19.14
min	22.40	21.84	20.98	20.24	18.99

Sky brightness (in counts) plot
Sky brightness (in mag/arcsec2) plot
Sky derivative plot
Sky colors plot

	Mean Sky Column offsets
band	u	g	r	i	z
col. 1	0.18*	0.04	0.04	0.02	0.03
col. 2	-0.03	0.04	0.04	0.07	0.00
col. 3	0.00	0.02	-0.01	0.03	0.00
col. 4	-0.01	-0.03	-0.02	-0.03	-0.05
col. 5	-0.04	-0.02	-0.02	-0.02	0.02
col. 6	-0.10	-0.05	-0.04	-0.06	-0.00

*Red entries are triggered by abs(offset) > 0.15 mag

	Gains (from sky quartiles)
band	u	g	r	i	z
col. 1	1.12	0.96	1.03	0.87	0.93
col. 2	1.50	1.01	0.95	0.93	0.89
col. 3	1.05	0.94	1.02	0.88	0.92
col. 4	1.25	0.95	0.90	0.97	0.87
col. 5	1.15	0.89	1.09	0.96	0.94
col. 6	1.15	0.77	0.94	0.87	0.98

Gain plot
Normalized Gain plot