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Astron. Astrophys. 332, 25-32 (1998)

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4. Optical counterparts

The JHK images were compared to optical images constructed from the Digitized Sky Survey (DSS) as offered by ESO through its WWW-page. Although most of the targets do not have a counterpart visible on the DSS image it is possible to derive the coordinates of the targets with an accuracy of about [FORMULA] in RA and Dec with the help of other stars that appear both on the JHK and DSS images. For stars with a visible counterpart on the DSS image the accuracy in the derived coordinates is [FORMULA] or better. The coordinates derived in this way are listed in Table 2. In the case of no identifiable IR counterpart the IRAS coordinates are listed.

The differences between the IRAS-FSC and the NIR coordinates are also listed in Table 2. They are between 3 and [FORMULA]. There remains always the possibility that the object of which we list the photometry is not the counterpart of the IRAS source but another red object (foreground or in the SMC).

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© European Southern Observatory (ESO) 1998

Online publication: March 10, 1998
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