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FITS Header

Primary Header

SIMPLE  =                    T / conforms to FITS standard                      
BITPIX  =                  -32 / array data type                                
NAXIS   =                    5 / number of array dimensions                     
NAXIS1  =                  720                                                  
NAXIS2  =                  172                                                  
NAXIS3  =                   50                                                  
NAXIS4  =                   15                                                  
NAXIS5  =                    3                                                  
CRPIX1  =      360.50833333333 / Pixel coordinate of reference point            
CRPIX2  =      126.50833333333 / Pixel coordinate of reference point            
CDELT1  =                 -0.5 / [deg] Coordinate increment at reference point  
CDELT2  =                  0.5 / [deg] Coordinate increment at reference point  
CUNIT1  = 'deg'                / Units of coordinate increment and value        
CUNIT2  = 'deg'                / Units of coordinate increment and value        
CTYPE1  = 'RA---CAR'           / Right ascension, plate caree projection        
CTYPE2  = 'DEC--CAR'           / Declination, plate caree projection            
CRVAL1  =                  0.0 / [deg] Coordinate value at reference point      
CRVAL2  =                  0.0 / [deg] Coordinate value at reference point      
LONPOLE =                  0.0 / [deg] Native longitude of celestial pole       
LATPOLE =                 90.0 / [deg] Native latitude of celestial pole        
MJDREFI =                  0.0 / [d] MJD of fiducial time, integer part         
MJDREFF =                  0.0 / [d] MJD of fiducial time, fractional part      
RADESYS = 'ICRS'               / Equatorial coordinate system                   
COMMENT                                                                         
COMMENT *** ACT dataset keys ***                                                
COMMENT                                                                         
TELESCOP= 'act+planck'         / Telescope used                                 
INSTRUME= 'mbac+actpol+planckHFI' / Instrument used                             
RELEASE = 'dr5.01  '           / Data release tag                               
SEASON  = 's08s18  '           / Observation season                             
PATCH   = 'AA      '           / Survey patch                                   
FREQ    = 'f220    '           / Frequency tag                                  
ACTTAGS = 'night,prelim'       / ACT data quality class                         
COMMENT                                                                         
COMMENT *** ACT product keys ***                                                
COMMENT                                                                         
POLCCONV= 'IAU     '           / Polarization convention                        
BUNIT   = 'uK^-2/arcmin^2'     / Physical (pixel) units                         
EXTNAME = 'IVAR-FULL'          / Extension name                                 
FILENAME= 'act_planck_dr5.01_s08s18_AA_f220_night_fullivar.fits' / FITS filename
CHECKSUM= 'n4CWq19Un1CUn19U'   / HDU checksum updated 2021-01-15T12:54:19       
DATASUM = '1748674629'         / data unit checksum updated 2021-01-15T12:54:19 
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