GOODS data product FITS header example

This example shows the FITS header for an image from the second GOODS Spitzer data products release: n_irac_1_s2_v0.30_sci.fits (GOODS-N IRAC channel 1 superdeep epoch 2 version 0.30 science image).


          / GENERIC FITS KEYWORDS

SIMPLE  =                    T / FITS standard
EXTEND  =                    F / File may contain extensions
BITPIX  =                  -32 / FOUR-BYTE SINGLE PRECISION FLOATING POINT
NAXIS   =                    2 / STANDARD FITS FORMAT
NAXIS1  =                 2200 / Axis length
NAXIS2  =                 2400 / Axis length

          / DATA FLOW KEYWORDS                                                  

ORIGIN  = 'NOAO-IRAF FITS Image Kernel July 2003' / FITS file originator        
IRAF-TLM= '18:05:29 (09/05/2005)' / Time of last modification                   
OBJECT  = 'GOODS-N superdeep epoch 2 IRAC channel 1' / Name of the object observ
                                                                                
TELESCOP= 'Spitzer '           / SPITZER Space Telescope                        
INSTRUME= 'IRAC    '           / SPITZER Space Telescope instrument ID          
CHNLNUM =                    1 / 1 digit instrument channel number              
IMGTYPE = 'sci     '           / Image Type                                     
COMMENT   Science data image                                                    
DATE    = '2005-05-10T01:05:30' / [YYYY-MM-DDThh:mm:ss UTC] file creation date  
GDP_VER = 'v0.30'              / GOODS data product version number              
FILENAM = 'n_irac_1_s2_v0.30_sci.fits' / Data product file name                 
                                                                                
          / PROPOSAL INFORMATION                                                
                                                                                
OBSRVR  = 'Mark Dickinson'     / Observer Name                                  
OBSRVRID=                  110 / Observer ID of Principal Investigator          
PROCYCL =                    2 / Proposal Cycle                                 
PROGID  =                  169 / Program ID                                     
PROTITLE= 'Great Observatories Origins Deep Survey (GOODS)' / Program Title     
PROGCAT =                   27 / Program Category                               
                                                                                
          / TIME AND EXPOSURE INFORMATION                                       
                                                                                
STRT_TIM= '2004-11-20T12:18:20' / Date & time at start of observing sequence    
END_TIM = '2004-11-25T17:15:11' / Date & time at end of observing sequence      
EXPTIME =                  1.0 / [sec] Effective integration time per pixel     
COMMENT   Image normalized to DN/sec, with effective integration = 1.0 sec      
                                                                                
          / TARGET AND POINTING INFORMATION                                     
                                                                                
CRVAL1  =        189.228621000 / [deg] RA at CRPIX1,CRPIX2                      
CRVAL2  =         62.238661000 / [deg] DEC at CRPIX1,CRPIX2                     
RA_HMS  = '12:36:54.8690'      / [hh:mm:ss.ssss] CRVAL1 as sexagesimal          
DEC_DMS = '+62:14:19.180'      / [dd:mm:ss.sss] CRVAL2 as sexagesimal           
RADESYS = 'ICRS    '           / International Celestial Reference System       
EQUINOX =                2000. / Equinox for ICRS celestial coord. system       
CD1_1   =   -0.000166666666667 /                                                
CD1_2   =        0.00000000000 /                                                
CD2_1   =        0.00000000000 /                                                
CD2_2   =    0.000166666666667 /                                                
CTYPE1  = 'RA---TAN'           / RA---TAN                                       
CTYPE2  = 'DEC--TAN'           / DEC--TAN                                       
CRPIX1  =               1110.5 / Reference pixel along axis 1                   
CRPIX2  =               1200.5 / Reference pixel along axis 2                   

          / PHOTOMETRY                                                          
                                                                                
BUNIT   = 'DN/sec  '           / Units of image data                            
FLUXCONV=                3.922 / [microJy per DN/sec] Flux conversion factor    
MAGZERO =               22.416 / AB magnitude for 1 DN/sec                      
GAIN    =                  3.3 / [e/DN] Instrumental gain conversion            
COMMENT   Effective gain (e/[DN/sec]) for mosaic varies with exposure time.