Provided by: montage_4.0+dfsg-3_amd64 
NAME
mHdr - Connect to the IRSA service to create a header template
SYNOPSIS
mHdr [-s system] [-e equinox] [-h height] [-p pixsize] [-r rotation] object|location width outfile
DESCRIPTION
Connects to the IRSA service HdrTemplate to create a header template based on a location, size,
resolution and rotation.
OPTIONS
-s system
Specify a coordinate system. Can be one of:
"equatorial" or "eq" (default)
"ecliptic" or "ec"
"galactic" or "ga"
"supergalactic" or "sgal"
-e equinox
Specify an equinox. Default is 2000.0
-h height
Height (y-axis) of area in degrees. Default is equal to width
-p pixsize
Size of a pixel (in arcsec); default is 1
-r rotation
Rotation of image; default is 0
ARGUMENTS
object|location
Object string or coordinate location; should be in quotes if there are any spaces or special
characters.
width Width (x-axis) of area
outfile
Path to output header template
RESULT
[struct stat="OK", count=header-lines]
MESSAGES
OK [struct stat="OK", count=header-lines]
ERROR Can't open output file outfile
ERROR location parameter required
ERROR width parameter required
ERROR Invalid object/coordinates
ERROR Couldn't find host irsa.ipac.caltech.edu
ERROR Couldn't create socket
ERROR irsa.ipac.caltech.edu: connect failed
EXAMPLES
If a user wants to create a mosaic centered on m31, 1 degree on each side, the first step is to create a
header template that describes the desired mosaic:
mHdr "10.68469 +41.26904" 1 m31.hdr
[struct stat="OK", count=16]
Now m31.hdr can be used by other Montage modules to generate a mosaic.
BUGS
The drizzle algorithm has been implemented but has not been tested in this release.
If a header template contains carriage returns (i.e., created/modified on a Windows machine), the cfitsio
library will be unable to read it properly, resulting in the error: [struct stat="ERROR", status=207,
msg="illegal character in keyword"]
It is best for the background correction algorithms if the area described in the header template
completely encloses all of the input images in their entirety. If parts of input images are "chopped off"
by the header template, the background correction will be affected. We recommend you use an expanded
header for the reprojection and background modeling steps, returning to the originally desired header
size for the final coaddition. The default background matching assumes that there are no non-linear
background variations in the individual images (and therefore in the overlap differences). If there is
any uncertainty in this regard, it is safer to turn on the "level only" background matching (the "-l"
flag in mBgModel.
COPYRIGHT
2001-2015 California Institute of Technology, Pasadena, California
If your research uses Montage, please include the following acknowledgement: "This research made use of
Montage. It is funded by the National Science Foundation under Grant Number ACI-1440620, and was
previously funded by the National Aeronautics and Space Administration's Earth Science Technology Office,
Computation Technologies Project, under Cooperative Agreement Number NCC5-626 between NASA and the
California Institute of Technology."
The Montage distribution includes an adaptation of the MOPEX algorithm developed at the Spitzer Science
Center.