mSubimage - Online in the Cloud

PROGRAM:

NAME

mSubimage - Create a "cutout" of a FITS image

SYNOPSIS

mSubimage [-d] [-a] [-h hdu] [-s statusfile] in.fits out.fits ra dec xsize [ysize]

mSubimage -p [-d] [-h hdu] [-s statusfile] in.fits out.fits xstartpix ystartpix xpixsize
[ypixsize]

DESCRIPTION

Creates a subimage (or "cutout") of a FITS file. Note that in "normal" mode,
all the parameters (location and size) are in degrees; in pixel (-p) mode, all of
them are in pixels

OPTIONS

-d Turns on debugging.

-a All pixels - Force retrieval of whole image (useful to extract an entire HDU)

-h hdu Operate on the specified FITS header extension (HDU)

-s statusfile
Output and errors are sent to statusfile instead of to stdout

-p Pixel mode - create subimage using pixel locations, instead of a location on the
sky

ARGUMENTS

in.fits
Input FITS file.

out.fits
Path to output FITS file.

ra In normal mode, RA of center of output image.

dec In normal mode, declination of center of output image.

xstartpix
In pixel mode, pixel along the x-axis where the cutout image will begin

ystartpix
In pixel mode, pixel along the y-axis where the cutout image will begin

xsize In normal mode, width of output image in degrees.

ysize In normal mode, height of output image in degrees (default is equal to xsize.

xpixsize
In pixel mode, width of output image in pixels

ypixsize
In pixel mode, height of output image in pixels (default is equal to xpixsize

RESULT

[struct stat="OK", content="blank, flat or normal"]

The content keyword indicates whether all pixels where NaN (blank), all pixels were the
same value (flat), or the image appears to be normal.

MESSAGES

OK [struct stat="OK", content="blank, flat or normal"]

ERROR HDU value (hdu) must be a non-negative integer

ERROR Cannot open status file: statusfile

ERROR Center RA string (string) cannot be interpreted as a real number

ERROR Center Dec string (string) cannot be interpreted as a real number

ERROR X size string (string) cannot be interpreted as a real number

ERROR Y size string (string) cannot be interpreted as a real number

ERROR Invalid 'x' size

ERROR Invalid 'y' size

ERROR Image file filename missing or invalid FITS

ERROR Cannot find HDU hdu

ERROR Output wcsinit() failed.

ERROR Location is off image

ERROR Region outside image

ERROR No pixels match area.

ERROR Can't create output file: out.fits

ERROR FITS library error

EXAMPLES

$ mSubimage image1.fits subimage.fits 307.9 37.29 .01 .01
[struct stat="OK", content="normal"]

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