sdss2xsp - Creates spectra and response files for XSPEC from an SDSS spectral file.
sdss2xsp infile phafile rspfile clobber
This tool reads an SDSS spectral FITS file (infile) and writes out a
standard PHA file (phafile) and RSP file (rspfile) which can be used
in XSPEC. The SDSS spectral FITS files can be obtained using the
SkyServer Quick Look tool. The spectrum created has a QUALITY
column based on the or_mask column of the input file and a STAT_ERR
column based on the inverse_variance column. Wavelengths and fluxes
are converted to standard XSPEC units.
The response file created assumes for the SDSS spectrometer a
resolution which varies linearly between 1850 at 3800 angstroms and
2200 at 9200 angstroms. For the BOSS spectrometer it assumes a
resolution which varies linearly from 1560 at 3700 angstroms to 2270
at 6000 angstroms (blue camera) then from 1850 at 6000 angstroms to
2650 at 9000 angstroms (red camera). The tool determines which
spectrometer has been used by reading the PLATEID keyword and using
the fact that the BOSS spectrometer has been used for all plates after 3510.
- infile [filename]
- The name of the input SDSS FITS file.
- phafile [filename]
- The name of the output PHA file.
- rspfile [filename]
- The name of the output RSP file.
- clobber [bool]
- If clobber = yes then overwrite the output files if a file of the
appropriate name already exists.