소백산 천문대 CCD 측광계의 {BVRI} 표준화

A total of 792 CCD images of V523 Cas were obtained on four nights of Jan. 2003 with the {it bvri} CCD photometric system attached to a 61cm reflector of Sobaeksan Optical Astronomy Observatory (SOAO). The 17 standard stars in the images were used to establish transformation relations between our {it bvri} system and the standard Johnson-Cousins {it BVRI} system. We derived the tentative equations of transformation between two photometric systems as follows; begin{eqnarray} V&=&v-0.0689(B-V)+0.0063 nonumber B-V&=&1.3197(b-v)-0.1733 nonumber V-R&=&0.9210(v-r)-0.1309 nonumber R-I&=&0.8892(r-i)-0.1055. nonumber end{eqnarray} Using these equations standard {it V} magnitudes and their color indexes ({it B-V, V-R, R-I}) for 57 stars in the field of the image were determined. KCI Citation Count: 1