Physics
Scientific paper
Sep 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cxo..prop.1362c&link_type=abstract
Chandra Proposal ID #04408148
Physics
Chandra Proposal Id #04408148
Scientific paper
A new msec X-ray pulsar (MSXP) , XTE J1814-338 (P=3.2 ms, Porb=1.9 hr) was just discovered (Markwardt, IAUC submitted). Its orb params are very similar to those of pulsar SAX J1808.4-3658, the only XRB known with a brown dwarf donor. J1808 also the only one of 4 prev known MSXPs whose orb params and disk geometry led to a bright opt counterpart in outburst. The new psr appears to be geometrically very similar (from orbit), and it is now anti-Sun, ideal for optical/IR obs. We are obtaining Magellan optical/IR obs of field, but cannot obtain opt spectra until 2 arcmin position improved, since field crowded. Also, J1808 showed strange IR/radio excess early in 1998 outburst that may have been synchtroton (ApJ, 563, L61); if so, soft X-ray sync excess also expected, possibly with jets, a first for a NS/pulsar. J1808 was never observed with CXO in outburst. We request ACIS/HETG for 10 ks to (1) localize source, (2) look for soft excess/extension, (3) spectrum, (4) HETG to limit pileup.
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