iras 20181-2244, with a 60 micron luminosity of 1.4*10^12 solar luminosity and an unreddened absolute visual magnitude of -24.7, is the most luminous of the two known narrow line quasars. it lies at a redshift of 0.185 and has iras fluxes of 10 mjy at 12 micron to almost 1 jy at 100 microns. it has been suggested that its blr is totally obscured by a dusty torus. the fact that it is the brightest of only two known narrow line quasars makes it a highly unusual object worthy of observation. we propose to obtain phot far-ir photometry, cam polarimetry and sws line spectra of this object. the phot photometry will enable us to determine if there is a turnover in the flux at long wavelengths and hence determine the dust temperature (assuming dust is present). cam polarimetry will enable us to measure any polarisation due to a dusty torus and provide near-ir fluxes. based on optical line data and models we calculate only one line will be strong enough to detect: the oiv 26 micron line. we therefore propose an sws observation of that line to verify the models and calculations. if the line is stronger than predicted and there is a second call we will then propose observations of other lines.
Instrument
CAM01 , PHT22 , SWS02
Temporal Coverage
1996-04-09T06:45:45Z/1996-04-09T07:42:49Z
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, LEECH et al., 1999, 'A MULTIWAVEBAND STUDY OF THE UNUSUAL NARROW LINE QUASAR IRAS 20181-2244', 1.0, European Space Agency, https://doi.org/10.5270/esa-uptbrnc
