Chandra Acis/letg Observations of the Least Absorbed X-Ray Nova: XTE J1118+48

Details Chandra Acis/letg Observations of the Least Absorbed X-Ray Nova: XTE J1118+48 Chandra Acis/letg Observations of the Least Absorbed X-Ray Nova: XTE J1118+48

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..530m&link_type=abstract

Chandra Proposal ID #01408013

Physics

Chandra Proposal Id #01408013

Scientific paper

SCIENCE RATIONALE We propose Chandra grating observations of the X-ray nova XTE J1118+48. The source was discovered in late March of this year by the All-Sky Monitor on RXTE (IAUC 7389) and it was identified optically shortly thereafter (IAUC 7390). This probable black-hole source has a unique and important characteristic: It is the only X-ray nova (XRN) located at high galactic latitude (b=+62 deg). Thus it has by far the lowest extinction of any XRN, making it an exciting target for grating studies with Chandra. The column density out of the plane in this direction is log(NH) = 20.1 (Dickey and Lockman 1990, A&AS 28, 215). At energies <1 keV very little is known about the properties of X-ray binaries--especially XRN--because nearly all sources lie at low galactic latitude and have high

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