Date: Wed, 9 May 2018 12:09:33 GMT
Subject: Making a region FITS file from FITS image
Full_Name: Takahiro Kikuchi
Submission from: (NULL) (184.108.40.206)
Hello, help desk.
Could you tell me answer for following question. I want to make a FITS region
from FITS image, pixel by pixel. Actually, the FITS image is 1 or 0 map in
(IM_X, IM_Y) image pixel.
#Now, I use 900x900 and 2.5 arcsec/pixel
When more than ten thousand pixels are converted to (X, Y) in 0.05 arcsec pixel
FITS region, I'm going to do following conversion, (IM_X, IM_Y) -> (X, Y)
using header keywords. And making a FITS region listing more than ten thousand
pixels to apply my event file.
1. How do I convert (IM_X, IM_Y) in degrees to (X, Y) in 0.05 arcsec pixel?
Please tell me equation with using FITS header keywords. Note that I already
know equation for converting (IM_X, IM_Y) -> (RA, DEC) in degree.
2. How do I create FITS region file which have list row for more than ten
thousand pixel BOX?
If you have any different idea, please tell me.
Actually, I created a new FITS region file by using tool of "region" with given
source list, however, NAXIS2 doesn't have more than 1028. So I can not overwrite
all pixels in the FITS region.