we propose to use phot to carry out measurements at wavelengths of 11.5, 60 and 160um (11.5, 60, 135 and 200 for the brightest objects) of a complete sub-sample of optically selected bright quasars taken from two recently completed multicolour (u,b,v,r,i) quasar surveys. the optical fluxes are in the range 15 < b < 17, partially overlapping those of the pg survey, but with a much better photometric accuracy (sigma_b ~ 0.1mag). our samples show that the true surface density of quasars in the range 15
Instrument
PHT03 , PHT22
Temporal Coverage
1996-07-20T03:45:39Z/1997-05-05T18:47:09Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the worlds first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
European Space Agency, ANDREANI et al., 1999, 'FIR PHOTOMETRY OF A COMPLETE SAMPLE OF OPTICALLY SELECTED BRIGHT QUASARS.', 1.0, European Space Agency, https://doi.org/10.5270/esa-p9xqjan
