Further tests on S02-002

From: Ariel Goobar (ariel@physto.se)
Date: Mon Apr 15 2002 - 14:13:13 PDT

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Hi,
some more fuel on he S02-002 case...

The flux-calibrated spectra of S02-002 that Chris and Gaston produced
gives R-I=1.3. The FORS2 spectrum misses the blue end of the R-band,
but I don't think that makes a big difference. Now, for z=1.08 at
max one expects R-I=1.4 (and 1.0 for z=0.85 *at max*) (with Rob's version
of Peter's SNIA template). Note, of course that the FORS spectra have
some galaxy contamination. I would like to repeat the exercise with the
spectra that Andy can produce, with some sort of galaxy subtraction.

With the updated calibration, it all starts to make sense... and we
may finally have a good HST candidate!

I think the case is now good enough to ask for z-band imaging at GMOS
tomorrow. Expected I-z at z=1.08 is about 0.4

Cheers,
Ariel

-- 
___________________________________________________________________
Ariel Goobar (ariel@physto.se)
FYSIKUM, Stockholm University
Stockholm Center for Physics, Astronomy & Biotechnology
tel: +46 8 55378659

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