spacer link to MAST page spacer logo image spacer
 
link to STScI page


Extended downtime notice

Due to a planned outage on Friday, April 12th starting at noon through Sunday, April 14th, access to this site will be unavailable during this time. We apologize for any inconvenience.

MAST Composite Quasar Spectrum

HST/FOS Composite Quasar Spectrum

This is a mean quasar spectrum, between 350 and 3000 Å, constructed from 284 FOS observations of 101 quasars with redshifts z > 0.33, as described in Zheng, W., et al. 1997. This reduced archival data is made available courtesy of Dr. Wei Zheng.

The spectrum is available as a flat ASCII file:

The table columns are:

  • Rest wavelength (Å)
  • Relative flux F(lambda)
  • Error
  • RMS

FUSE Composite Quasar Spectrum

This is a mean quasar spectrum from 630 Å to 1156 Å, constructed from 128 FUSE observations of 85 AGNs with redshifts z < 0.67, as described in Scott et al. 2004 in the 1 Nov 2004 issue of The Astrophysical Journal.

The spectrum is available as an ASCII file ( 22 kbytes).

The table columns are:

  • Rest wavelength (Å)
  • Relative flux F(lambda)
  • Error
  • RMS