Spread of Sources Test
From Tauwiki
Find X,Y:
peak -F spread-100-2.fits
- X Y fx fy fa
1 623.1 739.9 2.58 1.70 2.09
IRAF:imexamine fwhm = 2.515, 2.769, fwhm_average = 2.642
The spread of source in the image(100 frames combined) created by pipeline run is nearly that given (fwhm=2) in param file.
x: 623.95 y: 741.49
IRAF: imcntr
x: 623.912 y: 741.844
Convert to RA,DEC:
IDL> newxy2ad,623.1,739.9,5,10,8.8E-04,0,0,8.8E-04,ra,dec
x(peak) y ra dec 623.1 739.9 5.0993374 10.200536
IDL> newxy2ad,623.95,741.49,5,10,8.8E-04,0,0,8.8E-04,ra,dec
x(IRAF) y ra dec 623.95 741.49 5.1000979 10.201935
catalog:
ra dec c/s 5.1 10.2 1000
pipeline log file: crval1 = 5.0 crval2 = 10.0
from sim parameter file:
RA_START = 5.0
RA_END = 5.053
DEC_START = 10.0
first frame using ascii2fits:
peak -sF 00000.fits
- X Y fx fy fa
1 622.5 740.6 2.18 2.08 2.13
IRAF: fwhm: 2.23,2.066, fwhm_average: 2.148
- COL LINE
623.32 741.65
The spread of source in the image(first frame) created by ascii2fits of simulation file is nearly that given (fwhm=2) in param file.
TODO: Test using sextractor
