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The best resource is currently 2MASS. Catalogs can be downloaded from Gator at IPAC. For simplicity, I downloaded the table (with nearly 300,000 stars!) and placed it here.
I have cross-correlated the 2MASS catalog with the deep observations of
the Arches and Sgr B2, and come up with the following lists of X-ray and
IR matches that I'd like spectroscopy of. The "gold" sources have
positions accurate to 0.6", counterparts with H-K>1.1 (NH > 3e33 cm^-2, which
means they are not in the foreground), and measured X-ray colors (this
also allows me to check they are in the Galactic center). The "silver"
sources have positions good to 1", were detected in the hard band (so
are not obviously foreground sources), but don't have photometry in X-rays
(hence the values of -9). The "bronze" sources either have
rather poor positional uncertainties, or are likely to be foreground objects.
Most of them are probably real, as can be seen in
arches_matches.ps and
sgrb2_matches.ps.
Here are the source lists. Of course, by using them, you are agreeing
that I will be part any resultant publication. If you want to take spectra
as a favor and send them to me, that's even better!
In addition, R. Bandyopadhyay has taken 26 VLT fields that provide
information on counterparts down to K~20. A description of these
observations is on
astro-ph.
In the next few years, we will have access to several surveys of
increasing depth:
A survey taken by Nagata, Nishiyama et al. using the SIRIUS camera on the
South African IRSF. It will have a confusion limit of K~15.
R. Bandyopadhyay will have access to the UKIRT Deep-Sky Survey, which
will have a confusion limit of K~18 in the Galactic center.
S. Eikenberry will be taking spectra of candidate infrared counterparts,
and other interesting objects, using the Flamingos-2 multi-object infrared
spectrometer on Gemini.
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Contacts: Bandyopadhyay, Nagata, Nishiyama, Eikenberry. |
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Last modified: Thu Jun 8 14:29:39 PDT 2006