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JHK Standard Stars on the CIT Photometric System
We present a set of 58 stars with JHK standard values on the CIT systemand with a suitable magnitude range for use with array detectors onsmall- to moderate-size telescopes. Each final value is based on six to47 measures (with a mean of 17) obtained on separate nights with the USNaval Observatory (USNO) NICMOS3 (HgCdTe) camera. The objects include 20primary CIT standards from Elias et al. and 38 secondary sourcesselected from the SAAO and UKIRT standards lists, cover a K-magnituderange between 6.0 and 10.8, and lie north of declination -20°. Thestars were reduced to the CIT system as defined by Elias et al.,producing a USNO system that is identical to the near-infrared CITsystem. This work densifies the original CIT system by nearly a factorof 3 and extends its range by about 3 mag. The SAAO and UKIRT standardsare also compared with the CIT system.
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| Сазвежђа: | Водолија |
| Ректацензија: | 21h12m35.14s |
| Deклинација: | +00°53'36.9" |
| Apparent магнитуда: | 8.643 |
| Proper motion RA: | -7.8 |
| Proper motion Dec: | 10.9 |
| B-T magnitude: | 9.062 |
| V-T magnitude: | 8.678 |
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