GROND observations of MAXI J1836-194

Details GROND observations of MAXI J1836-194 GROND observations of MAXI J1836-194

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3619....1r&link_type=abstract

The Astronomer's Telegram, #3619

Astronomy and Astrophysics

Astronomy

1

Optical, Binary

Scientific paper

We observed the new transient MAXI J1836-194 (Negoro et al. 2011, ATEL 3611) with GROND (Greiner et al. 2008, PASP 120, 405), the 7-channel imager mounted at the 2.2m MPI/ESO telescope at La Silla Observatory (Chile) starting Aug 30th, 2011 at 23:19 UT. The optical counterpart (Kennea et al. 2011, ATEL 3613) is clearly detected in exposures of 16.5min in g' r' i' z' and 21.4min in J H K_s. We measured the following magnitudes (all in the AB system): g' = 16.21 ± 0.05 r' = 15.92 ± 0.05 i' = 15.53 ± 0.05 z' = 15.09 ± 0.05 J = 14.77 ± 0.05 H = 14.34 ± 0.05 K_s = 14.00 ± 0.07 These magnitudes were derived by calibrating the images against GROND zero points (g' r' i' z') and 2MASS field stars (J H K_s) and are not corrected for Galactic foreground reddening of E(B-V)~0.50mag (Schlegel et al.

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