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FITS Headers

act_dr4.01_s15_D8_pa2_f150_nohwp_night_3pass_4way_set2_srcs.fits

Primary Header

SIMPLE  =                    T / conforms to FITS standard                      
BITPIX  =                  -32 / array data type                                
NAXIS   =                    3 / number of array dimensions                     
NAXIS1  =                 3728                                                  
NAXIS2  =                 2531                                                  
NAXIS3  =                    3                                                  
CRPIX1  =               1864.5 / Pixel coordinate of reference point            
CRPIX2  =               6276.0 / Pixel coordinate of reference point            
CRPIX3  =                  1.0 / Pixel coordinate of reference point, Stokes T  
CDELT1  =    -0.00833333333333 / [deg] Coordinate increment at reference point  
CDELT2  =     0.00833333333333 / [deg] Coordinate increment at reference point  
CDELT3  =                  1.0 / Stokes component increment                     
CUNIT1  = 'deg'                / Units of coordinate increment and value        
CUNIT2  = 'deg'                / Units of coordinate increment and value        
CUNIT3  = ''                                                                    
CTYPE1  = 'RA---CAR'           / Right ascension, plate caree projection        
CTYPE2  = 'DEC--CAR'           / Declination, plate caree projection            
CTYPE3  = 'STOKES  '           / I,Q,U Stokes components                        
CRVAL1  =        2.62916666667 / [deg] Coordinate value at reference point      
CRVAL2  =                  0.0 / [deg] Coordinate value at reference point      
CRVAL3  =                  1.0 / Coordinate value at reference point, Stokes T  
LONPOLE =                  0.0 / [deg] Native longitude of celestial pole       
LATPOLE =                 90.0 / [deg] Native latitude of celestial pole        
RADESYS = 'ICRS'               / Equatorial coordinate system                   
COMMENT                                                                         
COMMENT *** ACT dataset keys ***                                                
COMMENT                                                                         
TELESCOP= 'act     '                                                            
INSTRUME= 'actpol  '                                                            
RELEASE = 'dr4.01  '           / Data release tag                               
SEASON  = 's15     '           / Observation season                             
PATCH   = 'D8      '           / Survey patch                                   
ARRAY   = 'pa2     '           / Telescope array                                
FREQ    = 'f150    '           / Frequency tag                                  
COMMENT                                                                         
COMMENT *** ACT product keys ***                                                
COMMENT                                                                         
POLCCONV= 'IAU     '           / Polarization convention                        
BUNIT   = 'uK      '           / Physical (pixel) units                         
EXTNAME = 'FREQ-MAP'           / Extension name                                 
FILENAME= 'act_dr4.01_s15_D8_pa2_f150_nohwp_night_3pass_4way_set2_srcs.fits' / F
CHECKSUM= '7VGR7UDR7UDR7UDR'   / HDU checksum updated 2020-06-30T07:39:33       
DATASUM = '73750664'           / data unit checksum updated 2020-06-30T07:39:33 
END                                                                             

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HEASARC Director: Dr. Alan P. Smale
LAMBDA Director: Dr. Eric R. Switzer
NASA Official: Dr. Eric R. Switzer
Web Curator: Mr. Michael R. Greason