#******************************************************************************
# E.S.O. - VLT project
#
# "@(#) $Id: VISTA_EXTENSION.txt,v 1.24 2003/08/01 14:24:02 vltsccm Exp $"
#
# VIRCAM_WCS dictionaries
#
# Refer to appendix A of document VLT-SPE-ESO-17240-1676 for details.
#
# who       when      what
# --------  --------  ----------------------------------------------
# pbunclark  2004-06-26  created.
#

#******************************************************************************
#
# Notes
# 1) The letters within () indicate the Class that keyword belongs to:
#    c = config
#    h = header
#    l = conf-log
#    p = private
#    s = setup
#    o = ops-log
#

Dictionary Name:   ESO-VLT-DIC.VISTA_EXTENSION
Scope:             VISTA
Source:            ESO VLT
Version Control:   @(#) $Id: 1.24 $
Revision:          $Revision: 0.5 $
Date:              2004-07-27
Status:            Development
Description:       VISTA extension-header keywords


Parameter Name:    XTENSION
Class:             header
Context:           FITS
Type:              string
Value Format:      %s
Unit:              
Comment Format:    Extension first keyword.
Description:       Standard FITS first keyword in an extension header.

Parameter Name:    NAXIS
Class:             header
Context:           FITS
Type:              integer
Value Format:      %d
Unit:              cardinal
Comment Format:    number of axes of data array [cardinal].
Description:       VISTA data stored in multi-extension FITS, hence
                   NAXIS=0 in primary header, NAXIS=2 in extension
                   headers.

Parameter Name:    NAXIS1
Class:             header
Context:           FITS
Type:              integer
Value Format:      %d
Unit:              pixels
Comment Format:    Size of first axis [pixels].
Description:       Standard FITS size of first axis

Parameter Name:    NAXIS2
Class:             header
Context:           FITS
Type:              integer
Value Format:      %d
Unit:              pixels
Comment Format:    Size of second axis [pixels].
Description:       Standard FITS size of second axis

Parameter Name:    BITPIX
Class:             header
Context:           FITS
Type:              integer
Value Format:      %d
Unit:              
Comment Format:    number of bits per pixel value.
Description:       Number of bits used to store pixel values
                   Standard values are defined in NOST-100.0
                   The value for VISTA IR will be
                   32 32-bit twos-complement binary integer
                   Value used to specify the undefined pixel values.

Parameter Name:    EXTNAME
Class:             header
Context:           FITS
Type:              string
Value Format:      %s
Unit:              
Comment Format:    FITS extension name.
Description:       Used to distinguish different extensions of the same
                   type in the FITS file.

Parameter Name:    INHERIT
Class:             header
Context:           FITS
Type:              logical
Value Format:      %c
Unit:              truth
Comment Format:    Extension inherits primary header [truth].
Description:       Inheritance massively cuts down on extension-header size
                   by removing unecessary multiplication of header records.

Parameter Name:    DET_LIVE
Class:             header
Context:           FITS
Type:              logical
Value Format:      %c
Unit:              boolean
Comment Format:    This detector is alive [boolean].
Description:       A broken detector outputs its data anyway, this keyword
                   flags the fact it is useless.
                   Should migrate to IRACE dictionary.