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    Light Curve Analysis of MisV Stars Identified with Candidate Variable Stars from OGLE-II Bulge Data    

May 1, 2003
Yoshida, S.; Greaves, J.

This report describes the analysis of light curves of 24 MISAO Project new variable stars identified with candidate variable stars from OGLE-II bulge data, based on the I-band magnitude observed by the OGLE-II project (http://bulge.princeton.edu/~ogle/ogle2/bulge_dia_variables/).

These objects were discovered and published as new variable stars in the course of the MISAO Project between 1999 May and 2000 May, but details on their types and light curves were uncertain. After that, the OGLE-II bulge data was published as pre-print in 2002 January. Then these MISAO objects were cross identified with the OGLE-II bulge objects and the types and periods were revealed based on the OGLE-II data.

We acknowledge the use of variable star observations obtained by the OGLE-II survey with the 1.3-m Warsaw telescope at Las Campanas Observatory of the Carnegie Institution of Washington.

MisV0012 = OGLE2-BUL-SC22-V1086

Mira variable with a period of 390 days.

MisV0014 = OGLE2-BUL-SC22-V1471

Mira variable with a period of 363 days.

MisV0015 = OGLE2-BUL-SC22-V383

The variation range from OGLE's observations is small as 11.838 - 11.933 mag, although the range from MISAO's unfiltered CCD observations is large as 12.8 - 14.3 mag.

The type is unknown. It may be a low amplitude irregular long period variable. The light curve looks similar to those of GCAS stars like delta Sco or chi Oph.

GCAS is an eruptive irregular variable of the Gamma Cas type, rapidly rotating B III-IVe star with mass outflow from it equatorial zone (from GCVS variability types description). But the 2MASS J-Ks color of MisV0015 is so large as 1.303 mag.

MisV0026 = OGLE2-BUL-SC22-V1726

Mira variable with a period of about 420 days.

MisV0030 = OGLE2-BUL-SC22-V2542

Semi regular variable with a period of 145 days.

MisV0036 = OGLE2-BUL-SC22-V2269

Mira variable with a period of 207 days.

MisV0045 = OGLE2-BUL-SC38-V829

Semi regular variable with a period of about 260 days.

MisV0049 = OGLE2-BUL-SC38-V410

Semi regular variable with a period of 56.7 days, and epoch at JD=2450555.

MisV0054 = OGLE2-BUL-SC19-V655

Semi regular variable with a period of 229 days.

MisV0074 = OGLE2-BUL-SC22-V372

Mira variable with a period of 460 days.

MisV0075 = OGLE2-BUL-SC23-V4423

Mira variable with a period of about 390 days.

MisV0081 = OGLE2-BUL-SC23-V1612

Semi regular variable with a period of 229 days.

MisV0372 = OGLE2-BUL-SC01-V3541

Semi regular variable with a period of 204 days.

MisV0545 = OGLE2-BUL-SC38-V3711

Mira variable with a period of about 350 days.

MisV0549 = OGLE2-BUL-SC31-V1296

Mira variable with a period of about 310 days.

MisV0551 = OGLE2-BUL-SC31-V4128

Mira variable with a period of about 270 days.

MisV0554 = OGLE2-BUL-SC31-V3381

Semi regular variable with a period of 193 days.

MisV0788 = OGLE2-BUL-SC22-V3184

Mira variable with a period of about 310 days.

MisV0789 = OGLE2-BUL-SC23-V3525

Possible doubly periodic semi regular variable. The shorter period may be about 70 days.

MisV0804 = OGLE2-BUL-SC19-V0608

Mira variable with a period of 288 days.

MisV0805 = OGLE2-BUL-SC19-V2332 = V4720 Sgr

Semi regular variable with a period of about 205 days.

MisV0806 = OGLE2-BUL-SC19-V2505 = V4721 Sgr

Possible doubly periodic semi regular variable. The shorter period may be about 100 days.

MisV0856 = OGLE2-BUL-SC22-V2395

Mira variable with a period of 216 days.

MisV0893 = OGLE2-BUL-SC23-V2837

Mira variable with a period of about 480 days.

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