Prompt Chandra Observation of the Type II SN 2002HH

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Chandra Proposal Id #03508128

Scientific paper

We propose to observe the Type II SN 2002hh. As we have shown, Chandra data will constrain details of the pre-SN evolution and properties of the SN ejecta and the circumstellar (cs) matter. In our simulations, we have assumed 1999em-type and 1998S-type spectra, with appropriate distance and absorption. If 02hh is like 99em, a 30 ksec obs can determine the flux to ~25% and the temperature to ~50%, which would constrain cs interaction models. If 02hh is like 98S, we expect ~0.1 cts/sec. A 30ks obs would give us more counts than the >100ks spent on 98S, and we would ALSO be able to determine elemental abundances to ~25-40%, which is even better than was done for 98S. This will constrain the progenitor mass as it did for 98S. The ONLY REASON we wish to not trigger our 200ks A04 TOO is the high extinction to 02hh. If we could use 30ks (and save 170 for another occasion) WE WOULD, but that may not be allowed. A 30ks DDT obs is a sensible and effective way to seize this rare opportunity.

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