Optical and NIR observations of GRO J1655-40

Details Optical and NIR observations of GRO J1655-40 Optical and NIR observations of GRO J1655-40

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005atel..418....1b&link_type=abstract

The Astronomer's Telegram, #418

Astronomy and Astrophysics

Astronomy

9

Infra-Red, Optical, Binaries, Black Holes, Transients

Scientific paper

In response to the recent report of renewed activity in GRO J1655-40 (ATEL #414), we have obtained B, V, I, J and K-band images using the ANDICAM instrument on the SMARTS 1.3m telescope at CTIO. On UT Feb 21.3-21.4 we measure the following magnitudes: B = 18.5, V = 17.0, I = 14.9, J = 13.4, K = 12.4. In comparison to the average quiescent magnitudes (Greene, Bailyn & Orosz 2001, ApJ, 554, 1290), we find the following differences in magnitude: dB = 0.3, dV = 0.2, dI = 0.2, dJ = 0.5, dK = 0.9.

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