GX 339-4 : Significant decline in IR and Optical

Details GX 339-4 : Significant decline in IR and Optical GX 339-4 : Significant decline in IR and Optical

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004atel..316....1b&link_type=abstract

The Astronomer's Telegram, #316

Astronomy and Astrophysics

Astronomy

4

Binaries, Black Holes, Transients

Scientific paper

We have been making daily optical and infrared observations of the black-hole candidate and microquasar GX 339-4 using ANDICAM on the SMARTS 1.3m telescope at CTIO. Data obtained on UT Aug 05, 06 and 08 show that GX 339-4 has become significantly fainter since UT Jul 31, and that the magnitude of this change increases with wavelength. The difference in magnitude between UT Jul 31 and UT Aug 08 are as follows: dV=0.14, dI=0.26, dJ=0.50, dH=0.68.

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