First X-Ray Detection of AN Isolated Blackhole Candidate MACHO-96-BLG-5

Details First X-Ray Detection of AN Isolated Blackhole Candidate MACHO-96-BLG-5 First X-Ray Detection of AN Isolated Blackhole Candidate MACHO-96-BLG-5

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cxo..prop.1166k&link_type=abstract

Chandra Proposal ID #04400240

Physics

Chandra Proposal Id #04400240

Scientific paper

All previously known stellar blackholes have been found as close binaries. The MACHO team recently reported two microlensing events with exceptionally long duration, lasting several hundred days, suggesting that the lensing objects are isolated black holes with ˜6 M_{&sun;} each. We thus propose a 10 ksec observation of the MACHO-96-BLG-5 lens in X-ray wavelength. By using the superior spacial resolution of Chandra, we search the X-ray counterpart of the lens. By testing the hardness ratio, we can test whether MACHO-96-BLG-5 is undoubtly due to a microlensing by an isolated blackhole or not. This observation may thus reveal that a Chandra observation of the long duration MACHO events is aunique and powerful tool to address isolated blackhole searches.

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