--- header unit 0: primary ---
SIMPLE = T / File conforms to FITS standard
BITPIX = -32 / number of bits per data pixel
NAXIS = 2 / number of data axes
NAXIS1 = 600 / length of data axis
NAXIS2 = 300 / length of data axis
EXTEND = T / FITS dataset may contain extensions
COMMENT Written by the R language FITSio package
COMMENT FITS (Flexible Image Transport System) format is defined in
COMMENT Astronomy and Astrophysics, volume 376, page 359 (2001)
CRPIX1 = 1
CRVAL1 = 360
CDELT1 = -0.13333333333333
CTYPE1 = 'GLON'
CUNIT1 = 'deg'
CRPIX2 = 1
CRVAL2 = -10
CDELT2 = 0.13333333333333
CTYPE2 = 'GLAT'
CUNIT2 = 'deg'
OBJECT = 'Sco OB2 D1 population (Fig.18a in Damiani et al.2019)'