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FITS Headers

dmr_53a_imap_4yr.fits

Primary Header

SIMPLE  =                    T /                                                
BITPIX  =                   16 / Number of bits per data pixel                  
NAXIS   =                    0 / Number of data axes                            
EXTEND  =                    T / FITS data may contain extensions               
DATE    = '2005-01-10'         / Creation date (CCYY-MM-DD) of FITS header      
COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy  
COMMENT and Astrophysics', volume 376, page 359; bibcode 2001A&A...376..359H    
TELESCOP= 'COBE    '           /                                                
INSTRUME= 'DMR     '           /                                                
OBJECT  = 'ALL-SKY '           /                                                
COMMENT                                                                         
COMMENT   This file contains the COBE-DMR 4-year sky map for the 53 GHz         
COMMENT   channel A data. This map was produced by Tony Banday and Gary         
COMMENT   Hinshaw in 1998 as follows. The final 4-year time-ordered             
COMMENT   differential data archive was converted to a calibrated archive       
COMMENT   in FITS format (the DMR 'CIO' data).  The WMAP prototype map-making   
COMMENT   software was adapted to the DMR experiment and used to generate       
COMMENT   these maps using the HEALPix tessellation of the sky.  As a check,    
COMMENT   the same archive and code were used to generate maps in the           
COMMENT   original COBE quad-cube pixelization. These latter maps agreed with   
COMMENT   the officially released COBE-DMR maps to numerical precision.         
COMMENT                                                                         
CHAN_ID = '53A     '           /                                                
FREQ    = '53 GHz  '           /                                                
REFERENC= 'C.L.Bennett, et.al., ApJL, 1996, 464, L1' /                          
REFERENC= 'A. Kogut, et al., ApJ, 1996, 470, 653' /                             
REFERENC= 'E.L. Wright, et al., ApJL, 1996, 458, L53' /                         
REFERENC= 'K.M. Gorski, et al., astro-ph/0409513' /                             
STOKES  = 'INTENSITY'          /                                                
EQUINOX =              2000.00 /                                                
SKYCOORD= 'GALACTIC'           /                                                
PIXTYPE = 'HEALPIX '           /                                                
ORDERING= 'NESTED  '           /                                                
RESOLUTN=                    5 /                                                
NSIDE   =                   32 /                                                
NPIX    =                12288 /                                                
FIRSTPIX=                    0 /                                                
LASTPIX =                12287 /                                                
DATE-BEG= '22/12/1989'         /Data set start date                             
JSTART  = '1989356000000000'   /Start time YYYYDDDHHMMSSHHH                     
DATE-END= '21/12/1993'         /Data set start date                             
JSTOP   = '1993355235959000'   /Stop time YYYYDDDHHMMSSHHH                      
COMMENT   DATE-BEG and DATE-END give the date during which                      
COMMENT   the earliest and the latest data used in this product                 
COMMENT   were obtained.                                                        
END                                                                             

Extension Header 2

XTENSION= 'BINTABLE'           /binary table extension                          
BITPIX  =                    8 /8-bit bytes                                     
NAXIS   =                    2 /2-dimensional binary table                      
NAXIS1  =                    8 /width of table in bytes                         
NAXIS2  =                12288 /number of rows in table                         
PCOUNT  =                    0 /size of special data area                       
GCOUNT  =                    1 /one data group (required keyword)               
TFIELDS =                    2 /number of fields in each row                    
TTYPE1  = 'TEMPERATURE '       /                                                
TFORM1  = 'E       '           /Real*4 (floating point)                         
TUNIT1  = 'mK,thermodynamic'   /physical unit of field                          
TTYPE2  = 'N_OBS   '           /                                                
TFORM2  = 'E       '           /Real*4 (floating point)                         
TUNIT2  = 'counts  '           /physical unit of field                          
PIXTYPE = 'HEALPIX '           /HEALPIX pixelisation                            
ORDERING= 'NESTED  '           /Pixel ordering scheme, either RING or NESTED    
OBJECT  = 'FULLSKY '           /                                                
COORDSYS= 'G       '           /Pixelization coordinate system                  
NSIDE   =                   32 /Healpix resolution parameter                    
NPIX    =                12288 /Total number of pixels                          
FIRSTPIX=                    0 /First pixel # (0 based)                         
LASTPIX =                12287 /Last pixel # (zero based)                       
INDXSCHM= 'IMPLICIT'           /indexing : IMPLICIT or EXPLICIT                 
GRAIN   =                    0 /GRAIN = 0: No index,                            
COMMENT         G = Galactic, E = ecliptic, C = celestial = equatorial          
COMMENT         GRAIN =1: 1 pixel index for each pixel,                         
COMMENT         GRAIN >1: 1 pixel index for Grain consecutive pixels            
END                                                                             

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