Quasars.org Radio/Xray Optical Catalog includes 21,617 Double Lobes

Get 100,340 quasar candidates from the Free Lunch radio/xray/optical
catalogue on ftp://quasars.org . It is 13Mb zipped, and displays
504,379 optical objects which are associated to xray/radio detections,
or are known quasars, and includes 21,617 double radio lobes. The
optical objects are sourced from the APM and USNO optical catalogues.
Associations presented a

ROSAT HRI: 13,240 optical associations out of 56,398 astrometrically
unique xray detections (the rest of the HRI are all duplicates)
ROSAT RASS: 30,685 / 124,730 xray
ROSAT PSPC: 30,234 / 102,005 xray
WGA (PSPC): 19,525 / 88,578 xray
FIRST: 155,132 / 781,667 radio, plus 11,512 double radio lobes.
NVSS: 242,853 / 1,810,664 radio, plus 8421 double lobes.
SUMSS: 31,674 / 165,531 radio, plus 1684 double lobes.

These associations yield 100,340 good quasar candidates, with
calculated percentage of being a QSO displayed for each object. Also
48,285 catalogued quasars are displayed (regardless of radio or xray
detection), which are visible on the APM and/or the USNO A2.0. There
is also a more comprehensive Master catalogue on the same site,
which gives additional information about each optical object, plus the
particulars of the double lobes.

This is the final release which is going to MNRAS shortly, and
includes the 27 Oct 03 release of SUMSS. I know I've said "final
release" before, but this is the one. Frankly, after 4½ years of
working on this I'm ready for a long snooze. You want great data, get
it here & now.

QUASARS.ORG. There is no second place. ftp://quasars.org

Eric Flesch
Wellington, New Zealand
27 October 2003