SUMMARY OF SEQUENCE NUMBER 400011
SUMMARY OF SEQUENCE NUMBER 400011
Title: SPECTRA AND MASS MEASURE FOR THE ULTRACOMPACT BINARY IN NGC 6624
Observer: MURRAY
Subject Category: BH and NS Binaries
Seq: 400011 ObsId: 00098
Long-term Plan bin: 9-Mar-2000
ABSTRACT
We propose to obtain HRC-S LETG spectra of the shortest period binary system know: the11 min WD-NS binary in the globular cluster NGC 6624. This prototype for the double degenerate binaries is bright enough to obtain high S/N spectra with the LETG such that phase-resolved spectra can neasure the abundances in this extreme example of stellar/binary evolution as well as provice the first measure of a NS mass in an actively accreting LMXB in a globular. Comparison with statistical measures will allow constraints on both cluster potential and formation and evolution of thsi exotic system.
TARGET SUMMARY
| TARGET NAME |
RA | DEC |
TIME |
SI |
GRAT |
TYPE |
TC |
ROLL |
PRE |
PHASE |
MULTI |
PRI |
| NGC 6624 |
275.918750 | -30.361111 |
10.00000 |
HRC-S |
LETG |
GTO |
no |
no |
no |
no |
no |
5 |
IMAGES
(NOTE: RASS images currently only available for targets LTS scheduled on or after Apr-09-2000)
PARAMETERS
Obscat Parameters
