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FITS Headers

wmap_iqusmap_r4_yr4_W3_v5.fits

Primary Header

SIMPLE  =                    T /FITS format                                     
BITPIX  =                   32 /Dummy primary header                            
NAXIS   =                    0 /No data is associated with this header          
EXTEND  =                    T /Extensions may (will!) be present               
RESOLUTN=                    4 /Resolution Index                                
PIXTYPE = 'HEALPIX '           /Pixel algorigthm                                
ORDERING= 'NESTED  '           /Ordering scheme                                 
NSIDE   =                   16 /Resolution Parameter                            
NPIX    =                 3072 /Number of pixels                                
FIRSTPIX=                    0 /First pixel (0 based)                           
LASTPIX =                 3071 /Last pixel (0 based)                            
TELESCOP= 'WMAP    '           /Wilkinson Microwave Anisotropy Probe            
COMMENT This file contains WMAP Intensity and Polarization (I, Q, U, and S)     
COMMENT Res 4 skymaps for the differencing assembly indicated by                
COMMENT the DA keyword.                                                         
COMMENT The fourth year of data went into the map.                              
REFERENC= 'WMAP Explanatory Supplement:  http://lambda.gsfc.nasa.gov/' /        
STOKES  = 'IQUS    '           /                                                
DA      = 'W3      '           /WMAP Differencing Assembly                      
FREQ    = 'W band  '           /Frequency band                                  
RELEASE = 'DR5     '           /WMAP Release                                    
DATE    = '2012-07-05T22:33:07' /file creation date (YYYY-MM-DDThh:mm:ss UT)    
SIGMA0_I=        6.94058000000 /                                                
SIGMA0_Q=        6.95799000000 /                                                
SIGMA0_U=        6.95799000000 /                                                
SIGMA0_S=        6.95799000000 /                                                
COMMENT Pixel noise in mK may be evaluated from the Nobs field using            
COMMENT the expression:                                                         
COMMENT sigma = sigma0/sqrt(Nobs)                                               
COMMENT sigma0 applies to the entire map and is a scalar value listed           
COMMENT in the header.                                                          
END                                                                             

Stokes Maps

XTENSION= 'BINTABLE'           /binary table extension                          
BITPIX  =                    8 /8-bit bytes                                     
NAXIS   =                    2 /2-dimensional binary table                      
NAXIS1  =                   20 /width of table in bytes                         
NAXIS2  =                 3072 /number of rows in table                         
PCOUNT  =                    0 /size of special data area                       
GCOUNT  =                    1 /one data group (required keyword)               
TFIELDS =                    5 /number of fields in each row                    
TTYPE1  = 'TEMPERATURE'        /                                                
TFORM1  = 'E       '           /                                                
TUNIT1  = 'mK,thermodynamic'   /                                                
TTYPE2  = 'Q_POLARISATION'     /                                                
TFORM2  = 'E       '           /                                                
TUNIT2  = 'mK,thermodynamic'   /                                                
TTYPE3  = 'U_POLARISATION'     /                                                
TFORM3  = 'E       '           /                                                
TUNIT3  = 'mK,thermodynamic'   /                                                
TTYPE4  = 'SPUR_SIGNAL'        /                                                
TFORM4  = 'E       '           /                                                
TUNIT4  = 'mK,thermodynamic'   /                                                
TTYPE5  = 'N_OBS   '           /                                                
TFORM5  = 'E       '           /                                                
TUNIT5  = 'counts  '           /                                                
EXTNAME = 'Stokes Maps'        /                                                
DATE    =                    0 /                                                
PIXTYPE = 'HEALPIX '           /                                                
ORDERING= 'NESTED  '           /                                                
NSIDE   =                   16 /                                                
FIRSTPIX=                    0 /                                                
LASTPIX =                 3071 /                                                
END                                                                             

Weight Arrays

XTENSION= 'BINTABLE'           /binary table extension                          
BITPIX  =                    8 /8-bit bytes                                     
NAXIS   =                    2 /2-dimensional binary table                      
NAXIS1  =                   28 /width of table in bytes                         
NAXIS2  =                 3072 /number of rows in table                         
PCOUNT  =                    0 /size of special data area                       
GCOUNT  =                    1 /one data group (required keyword)               
TFIELDS =                    7 /number of fields in each row                    
TTYPE1  = 'N_OBS   '           /                                                
TFORM1  = 'E       '           /                                                
TTYPE2  = 'M11     '           /                                                
TFORM2  = 'E       '           /                                                
TUNIT2  = 'counts  '           /                                                
TTYPE3  = 'M12     '           /                                                
TFORM3  = 'E       '           /                                                
TUNIT3  = 'counts  '           /                                                
TTYPE4  = 'M13     '           /                                                
TFORM4  = 'E       '           /                                                
TUNIT4  = 'counts  '           /                                                
TTYPE5  = 'M23     '           /                                                
TFORM5  = 'E       '           /                                                
TUNIT5  = 'counts  '           /                                                
TTYPE6  = 'M22     '           /                                                
TFORM6  = 'E       '           /                                                
TUNIT6  = 'counts  '           /                                                
TTYPE7  = 'M33     '           /                                                
TFORM7  = 'E       '           /                                                
TUNIT7  = 'counts  '           /                                                
EXTNAME = 'Weight Arrays'      /                                                
DATE    =                    0 /                                                
PIXTYPE = 'HEALPIX '           /                                                
ORDERING= 'NESTED  '           /                                                
NSIDE   =                   16 /                                                
FIRSTPIX=                    0 /                                                
LASTPIX =                 3071 /                                                
COMMENT Weight arrays must be divided by a scaling factor sigma_0^2             
COMMENT to provide a weight array in physical units (mK^-2).  See WMAP          
COMMENT Explanatory Supplement.                                                 
END                                                                             

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HEASARC Director: Dr. Alan P. Smale
LAMBDA Director: Dr. Eric R. Switzer
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