Discovery of the NIR counterpart of XTE J1817-330
ATel #724; P. D'Avanzo (INAF-OAB), P. Goldoni (CEA, Saclay), S. Covino (INAF-OAB), S. Campana (INAF-OAB), E. Molinari(INAF-OAB), G. Chincarini (Uni. Bicocca), F. M. Zerbi (INAF-OAB), V. Testa (INAF-OAR), G. Tosti (Uni. Perugia), F. Vitali (INAF-OAR), L. A. Antonelli (INAF-OAR), P. Conconi (INAF-OAB), G. Malaspina (INAF-OAB), L. Nicastro (INAF-IASF-Pa), E. Palazzi (INAF-IASF-Bo), on behalf of the REM/ROSS Team
on 7 Feb 2006; 14:29 UT
Credential Certification: Sergio Campana (campana@merate.mi.astro.it)
Subjects: Infra-Red, Binary, Black Hole, Transient
We report on optical and infrared observations of the black hole
candidate XTE J1817-330 (ATel #714). The observations were
performed in the K band with the REMIR Camera (field of view of 10'x10'
and a pixel size of 1.22") and in the R band with the ROSS Camera (field of
view of 10'x10' and a pixel size of 1.22"). Both instruments are mounted on
REM, a 60-cm robotic telescope located at the La Silla Observatory (Chile).
NIR observations started on Feb 7.378 (UT), for a total of 10 minutes of
exposure. We find a source at the position:
R.A.(2000) = 18:17:43.54
Dec.(2000) = -33:01:06.7
with an accuracy of +/- 0.5 arcseconds. This position is consistent
with the position of the radio counterpart (ATel #721).
The magnitude of the object is K = 15.0 +/- 0.4, calibrated with respect
to the 2MASS catalogue. Further analysis is in progress. We propose this
source as the NIR counterpart of XTE J1817-330.
A finding chart can be found at the following URL:
www.merate.mi.astro.it/~davanzo/REM/XTE_J1817/XTE_REMIR_2MASS_K_3.jpg
IR findind chart
