XTE J1859+266 Brightens to 1.4 Crab

Details XTE J1859+266 Brightens to 1.4 Crab XTE J1859+266 Brightens to 1.4 Crab

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999atel...47....1s&link_type=abstract

The Astronomer's Telegram, #47

Astronomy and Astrophysics

Astronomy

5

X-Ray, Black Holes, Transients

Scientific paper

Six 90-s observations of XTE J1859+226 (IAUC #7274) with the RXTE/ASM around 1999 Oct 16.50 (UT) show a mean intensity of 1.37+-0.04 Crab (2-12 keV). The most recent cluster of observations prior to this outburst measured an intensity of 870+-30 mCrab at 1999 Oct 16.115. This value is consistent with the generally linear rise this source has shown since its initial emergence around 1999 Oct 8.7, but the most recent points show a clear excess above the extrapolation of the trend.

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