--- header unit 0: primary ---
SIMPLE = T / conforms to FITS standard
BITPIX = -64 / array data type
NAXIS = 2 / number of array dimensions
NAXIS1 = 60
NAXIS2 = 45
COORDSYS = 'IRCS                / Coordinate reference frame for the RA and DEC'
SIGUNIT = ''
TARGET = 'M99 (NGC 4254)'
WCSAXES = 2 / Number of coordinate axes
CRPIX1 = -1020.0 / Pixel coordinate of reference point
CRPIX2 = -2654.0 / Pixel coordinate of reference point
CDELT1 = -0.002222222222222 / [deg] Coordinate increment at reference point
CDELT2 = 0.002222222222222 / [deg] Coordinate increment at reference point
CUNIT1 = 'deg' / Units of coordinate increment and value
CUNIT2 = 'deg' / Units of coordinate increment and value
CTYPE1 = 'RA---TAN' / Right ascension, gnomonic projection
CTYPE2 = 'DEC--TAN' / Declination, gnomonic projection
CRVAL1 = 187.10241878675 / [deg] Coordinate value at reference point
CRVAL2 = 8.506886049020 / [deg] Coordinate value at reference point
LONPOLE = 180.0 / [deg] Native longitude of celestial pole
LATPOLE = 8.50688604902 / [deg] Native latitude of celestial pole
RADESYS = 'ICRS' / Equatorial coordinate system
EXTNAME = 'image'
BMAJ = 0.006944444444444444 / [deg] FWHM, 25 arcsec
AUTHOR = 'Pantoni et al. 2026 (DOI 10.1051/0004-6361/202557583)'
COMMENT = Masked pixels (-1).