The eclipsing supersoft X-ray binary CAL 87 has been observed with Chandra on August 13/14 , 2001 for nearly 100 ksec , covering two full orbital cycles and three eclipses .
The shape of the eclipse light curve derived from the zeroth-order photons indicates that the size of the X-ray emission region is about 1.5 R _ { \odot } .
The ACIS/LETG spectrum is completely dominated by emission lines without any noticeable continuum .
The brightest emission lines are significantly redshifted and double-peaked , suggestive of emanating in a 2000 km/s wind .
We model the X-ray spectrum by a mixture of recombination and resonant scattering .
This allows us to deduce the temperature and luminosity of the ionizing source to be kT \sim 50 - 100 eV and L _ { X } \sim 5 \times 10 ^ { 37 } erg/s .