ABOUT LAMBDA

FITS Headers

wmap_K_mem_freefree_7yr_v4.fits

Primary Header

SIMPLE  =                    T / file does conform to FITS standard             
BITPIX  =                    8 / number of bits per data pixel                  
NAXIS   =                    0 / number of data axes                            
EXTEND  =                    T / FITS dataset may contain extensions            
COMMENT   FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT   and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H 
DATE    = '2009-09-24T00:00:00' /file creation date (YYYY-MM-DDThh:mm:ss UT)    
TELESCOP= 'WMAP     '          / Wilkinson Microwave Anisotropy Probe           
OBJECT  = 'ALL-SKY '           / Portion of sky given                           
EQUINOX =               2000.0 / Equinox of coordinates                         
COMMENT   This file contains the WMAP MEM derived K band free-free              
COMMENT   foreground based on the 7-year observations.                          
REFERENC= 'WMAP Explanatory Supplement: http://lambda.gsfc.nasa.gov/            
RELEASE = 'DR4     '           / WMAP Release                                   
VERSION = 'PASS 4  '           / Internal WMAP Version                          
STARTGMT= '20012220000000000000' / Start time of TOD used                       
ENDGMT  = '20082212359000000000' / End time of TOD used                         
FREQ    = 'K band  '           / Frequency band                                 
STOKES  = 'Intensity'          / i, q, or u                                     
RESOLUTN=                    7 / Resolution index                               
SKYCOORD= 'Galactic'           / Coordinate system                              
PIXTYPE = 'HEALPIX '           / Pixel algorithm                                
ORDERING= 'NESTED  '           / Ordering scheme                                
NSIDE   =                  128 / Resolution parameter                           
NPIX    =               196608 / # of pixels                                    
FIRSTPIX=                    0 / First pixel (0 based)                          
LASTPIX =               196607 / Last pixel (0 based)                           
END                                                                             

Archive Map Table

XTENSION= 'BINTABLE'           /binary table extension                          
BITPIX  =                    8 /8-bit bytes                                     
NAXIS   =                    2 /2-dimensional binary table                      
NAXIS1  =                    8 /width of table in bytes                         
NAXIS2  =               196608 /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'        /label for field   1                             
TFORM1  = '1E      '           /data format of field: 4-byte REAL               
TUNIT1  = 'mK, antenna'        /physical unit of field                          
TTYPE2  = 'N_OBS   '           /label for field   2                             
TFORM2  = '1E      '           /data format of field: 4-byte REAL               
TUNIT2  = 'counts  '           /physical unit of field                          
EXTNAME = 'Archive Map Table'  /name of this binary table extension             
DATE    = '2009-09-24T00:00:00' /Table/WMAP creation date                       
PIXTYPE = 'HEALPIX '           /Pixel algorithm                                 
ORDERING= 'NESTED  '           /Ordering scheme                                 
NSIDE   =                  128 /Resolution parameter                            
NPIX    =               196608 /# of pixels                                     
FIRSTPIX=                    0 /First pixel (0 based)                           
LASTPIX =               196607 /Last pixel (0 based)                            
COMMENT   Temperature is antenna temperature.                                   
COMMENT   N_obs is set to 1 for all pixels. The N_obs field                     
COMMENT    is filled only to provide consistent map format.                     
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