---
name: "immatch"
section: "1"
platform: "linux"
package: "wcstools"
version: "3.9.7-1.1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/immatch"
---

# immatch(1)

AME

## NAME

immatch - AME

## SYNOPSIS

**\[-vl\]** \[*-m mag*\] \[*-n frac*\] \[*-s mode*\] \[*-g class*\] \[*-h maxref*\] \[*-i peak*\]

## DESCRIPTION

Match catalog to image stars from WCS in image file

-

  \[-c catalog\] \[-p scale\] \[-b ra dec\] \[-j ra dec\] \[-r deg\] \[-t tol\] \[-x x y\] \[-y frac\] FITS or IRAF file(s)

**-a** ang: initial rotation angle in degrees (default 0)

**-b**: initial center in B1950 (FK4) RA and Dec

**-c** cat: reference catalog (gsc, uac, ujc, tab table file

**-d** cat: Use following DAOFIND output catalog instead of search

**-f**: Write output X Y RA Dec, instead of N RA Dec X Y

**-g** num: Guide Star Catalog class (**-1**=*all*,0,3 (default **-1**)

**-h** num: maximum number of reference stars to use (10-200, default 25

**-i** num: minimum peak value for star in image (\<0=-sigma)

**-j**: initial center in J2000 (FK5) RA and Dec

**-k**: magnitude to use (1 to nmag)

**-l**: reflect left\<-\>right before rotating and fitting

**-mx** m1\[,m2\]: initial reference catalog magnitude and limits

**-p** num: initial plate scale in arcsec per pixel (default 0)

**-q**: fit image to catalog magnitude polynomial(s)

**-r** ang: rotation angle in degrees before fitting (default 0)

**-s** frac: use this fraction extra stars (default 1.0)

**-t** tol: offset tolerance in pixels (default 20)

**-u** num: USNO catalog single plate number to accept

**-v**: verbose

**-w**: rotate image WCS with image

**-x** x y: X and Y coordinates of reference pixel (default is center)

**-y** num: multiply image dimensions by this for search (default is 1)

**-z**: use AIPS classic projections instead of WCSLIB