ABOUT LAMBDA

FITS Headers

wmap_sim_iqumap_r9_yr6_W3_v4.fits

Primary Header

SIMPLE  =                    T /FITS format                                     
BITPIX  =                   16 /Dummy primary header                            
NAXIS   =                    0 /No data is associated with this header          
EXTEND  =                    T /Extensions may (will!) be present               
RESOLUTN=                    9 /Resolution Index                                
PIXTYPE = 'HEALPIX '           /Pixel algorigthm                                
ORDERING= 'NESTED  '           /Ordering scheme                                 
NSIDE   =                  512 /Resolution Parameter                            
NPIX    =              3145728 /Number of pixels                                
FIRSTPIX=                    0 /First pixel (0 based)                           
LASTPIX =              3145727 /Last pixel (0 based)                            
TELESCOP= 'WMAP    '           /Wilkinson Microwave Anisotropy Probe            
COMMENT This file contains WMAP Intensity and Polarization                      
COMMENT (I, Q, and U) Res 9 skymaps for the differencing assembly               
COMMENT indicated by the DA keyword.                                            
COMMENT Simulated data was used to construct these maps!                        
COMMENT The sixth year of data went into the map.                               
REFERENC= 'WMAP Explanatory Supplement:  http://lambda.gsfc.nasa.gov/' /        
STOKES  = 'IQU     '           /                                                
DA      = 'W3      '           /WMAP Differencing Assembly                      
FREQ    = 'W band  '           /Frequency band                                  
RELEASE = 'DR4     '           /WMAP Release                                    
DATE    = '2010-04-13T14:15:53' /file creation date (YYYY-MM-DDThh:mm:ss UT)    
END                                                                             

Stokes Maps

XTENSION= 'BINTABLE'           /binary table extension                          
BITPIX  =                    8 /8-bit bytes                                     
NAXIS   =                    2 /2-dimensional binary table                      
NAXIS1  =                   16 /width of table in bytes                         
NAXIS2  =              3145728 /number of rows in table                         
PCOUNT  =                    0 /size of special data area                       
GCOUNT  =                    1 /one data group (required keyword)               
TFIELDS =                    4 /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  = 'N_OBS   '           /                                                
TFORM4  = 'E       '           /                                                
TUNIT4  = 'counts  '           /                                                
EXTNAME = 'Stokes Maps'        /                                                
DATE    =                    0 /                                                
PIXTYPE = 'HEALPIX '           /                                                
ORDERING= 'NESTED  '           /                                                
NSIDE   =                  512 /                                                
FIRSTPIX=                    0 /                                                
LASTPIX =              3145727 /                                                
END                                                                             

Weight Arrays

XTENSION= 'BINTABLE'           /binary table extension                          
BITPIX  =                    8 /8-bit bytes                                     
NAXIS   =                    2 /2-dimensional binary table                      
NAXIS1  =                   16 /width of table in bytes                         
NAXIS2  =              3145728 /number of rows in table                         
PCOUNT  =                    0 /size of special data area                       
GCOUNT  =                    1 /one data group (required keyword)               
TFIELDS =                    4 /number of fields in each row                    
TTYPE1  = 'N_OBS   '           /                                                
TFORM1  = 'E       '           /                                                
TTYPE2  = 'QQ      '           /                                                
TFORM2  = 'E       '           /                                                
TUNIT2  = 'counts  '           /                                                
TTYPE3  = 'QU      '           /                                                
TFORM3  = 'E       '           /                                                
TUNIT3  = 'counts  '           /                                                
TTYPE4  = 'UU      '           /                                                
TFORM4  = 'E       '           /                                                
TUNIT4  = 'counts  '           /                                                
EXTNAME = 'Weight Arrays'      /                                                
DATE    =                    0 /                                                
PIXTYPE = 'HEALPIX '           /                                                
ORDERING= 'NESTED  '           /                                                
NSIDE   =                  512 /                                                
FIRSTPIX=                    0 /                                                
LASTPIX =              3145727 /                                                
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                                                                             

A service of the HEASARC and of the Astrophysics Science Division at NASA/GSFC
Goddard Space Flight Center, National Aeronautics and Space Administration
HEASARC Director: Dr. Alan P. Smale
LAMBDA Director: Dr. Eric R. Switzer
NASA Official: Dr. Eric R. Switzer
Web Curator: Mr. Michael R. Greason