December 16, 1999 Pratt Conference Room, Perkin G-04, 12:30 pm
CANCELLED!
A Failed Attempt to Measure the Time Delay of a Lensed Quasar
Prof. Paul Schechter, M.I.T.
A time delay of 9 months has been reported by Wisotzki et al.
for the lensed quasar HE1104-1805. It has been monitored by
the Warsaw group using the OGLE telescope on Las Campanas
for two full seasons, with a few additional points in an earlier season
and the current season. Though significant variablity is observed
in both components, there are very significant differences in the
structure functions of the two light curves, making it difficult
to estimate a time delay. Several alternative interpretations of
this result will be discussed.