The following document lists the file abstract/KLEECH_IRAS2018.abs
from catalogue VI/111.
A plain copy of the file
(without headers/trailers) may be downloaded.
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.