Search for photometric standards close to the specified RA and Dec. Note that if you are using NIRI at JHK with the f/6 camera (0.12 arcsec/pixel scale), then standards fainter than 11th magnitude should be used. The NIRI OT library includes observations of suitable JHKLM standards, with appropriate exposure times.
1,2. Target coordinates should be J2000 and in sexagesimal format.
3. UKIRT = JHK observations of faint standard stars in the Mauna Kea Observatories NIR photometric system, Leggett et al., 2006, MNRAS, in press. Persson = A New System of Faint NIR Standard Stars, Persson, et al., 1998, AJ, 116, 2475. WFCAM = Average Y-band magnitudes of UKIRT standards measured in UKIDSS DR4.
4. If observation duration > 0, return two sets of standards, one for before and one for after the science target.
5. Maximum distance for acceptable standards.2008 July 29 - Andrew Stephens