PSP QA for run 5398, rerun 40

QA produced on Fri Jun 10 20:28:42 CDT 2005 with photo version v5_4_28

	Field Quality (nFields=222)
quality	nOK	nHOLE	% HOLE
union	81	141	63.5*
col. 1	103	119	53.6*
col. 2	109	113	50.9*
col. 3	117	105	47.3*
col. 4	134	88	39.6*
col. 5	141	81	36.5*
col. 6	158	64	28.8*

*Red entries are triggered by the percentage of unacceptable fields exceeding
5 in any column, or 15 for the union of all columns.
PSP status plot

PSF width (FWHM arcsec) statistics for column 6, filter r:
Mean PSF width = 1.63
Median = 1.62, min = 1.42, max = 2.02
There are 0 fields ( 0.0%) with PSFwidth > 4.0 arcsec
This run is 222 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	0.16	0.96	1.64	1.69	0.40
col. 2	0.01	0.86	1.48	1.66	0.40
col. 3	0.03	0.88	1.41	1.67	0.45
col. 4	0.01	0.60	1.25	1.46	0.24
col. 5	0.00	0.52	1.17	1.28	0.36
col. 6	0.00	0.51	0.89	1.14	0.22

PSP status plot

	Mean N stars for estimating PSF
band	u	g	r	i	z
col. 1	33.4	13.2	5.8*	4.9*	18.4
col. 2	62.9	10.7	6.0*	4.9*	18.6
col. 3	39.9	11.0	6.8*	5.0*	20.1
col. 4	73.7	12.3	7.8*	5.8*	28.2
col. 5	63.0	12.3	7.6*	6.7*	19.7
col. 6	86.0	13.6	10.2	8.4*	29.0

*Red entries are triggered by Nstars < 10
Number of stars used for estimating PSF

	Mean m(aperture)-m(psf) Bias (mag)
band	u	g	r	i	z
col. 1	-0.05	-0.04	-0.04	-0.04	-0.05
col. 2	-0.04	-0.04	-0.04	-0.05	-0.05
col. 3	-0.04	-0.04	-0.03	-0.05	-0.05
col. 4	-0.04	-0.04	-0.04	-0.04	-0.05
col. 5	-0.04	-0.03	-0.04	-0.04	-0.04
col. 6	-0.05	-0.03	-0.04	-0.04	-0.05

Aperture Correction Bias plot

	Mean m(aperture)-m(psf) Error (mag)
band	u	g	r	i	z
col. 1	0.02	0.02	0.01	0.01	0.02
col. 2	0.02	0.01	0.02	0.01	0.01
col. 3	0.02	0.01	0.01	0.01	0.02
col. 4	0.02	0.01	0.01	0.01	0.01
col. 5	0.02	0.01	0.01	0.01	0.01
col. 6	0.02	0.01	0.01	0.01	0.01

Aperture Correction Error plot
A few related auxiliary plots:
Aperture Correction Scatter (w/o bias contribution)
Power-law index for the outer PSF
Kolmogoroff exponents

*Averaged over 6 columns

	Sky brightness* (mag/arsec2)
band	u	g	r	i	z
mean	22.28	22.03	21.14	20.42	19.17
max	22.36	22.08	21.22	20.64	19.43
min	22.16	21.92	20.99	20.10	18.79

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	-0.00	-0.03	-0.01	0.00	0.02
col. 2	-0.02	-0.02	-0.01	-0.03	-0.06
col. 3	0.01	-0.01	-0.04	-0.00	-0.02
col. 4	0.00	0.01	0.02	0.01	-0.01
col. 5	0.02	0.02	0.02	-0.01	0.03
col. 6	-0.00	0.02	0.03	0.02	0.06

The noise is estimated from the width of the sky histogram, corrected
for the dark variance, and normalized by the Poisson value:
norm. spurious noise = sqrt[gain*(sigma_sky^2-dark_var)/sky]
Values significantly larger than 1 indicate the presence of spurious noise.

	Spurious Noise (from sky quartiles)
band	u	g	r	i	z
col. 1	1.01	1.12	1.11	1.26	1.10
col. 2	0.86	1.10	1.15	1.20	1.12
col. 3	1.02	1.12	1.11	1.25	1.09
col. 4	0.93	1.12	1.17	1.20	1.15
col. 5	1.02	1.17	1.06	1.16	1.09
col. 6	0.96	1.08	1.14	1.20	1.07

Spurious Noise plot
Note that bright stars cause single-field spikes which are, for
different bands, aligned in the field number. A temporal increase
in noise can be traced in the r-i-u-z-g order (2 fields shift).