Home Page       Updated on June 16, 2002

Type Classification of 255 MISAO Project New Variable Stars     June 16, 2002 Yoshida, S.; Greaves, J. This report describes the identification of 255 MISAO Project new variable stars with 2MASS (The Two Micron All Sky Survey) catalog data and the type classification based on the 2MASS J-Ks color. The table attached in this report lists the magnitude range measured from the unfiltered CCD images, the 2MASS J-band magnitude, 2MASS J-Ks color, and the derived type classification. The type classification is determined using the following criteria. In the case of a typical red variable star, the 2MASS J-band magnitude becomes several magnitudes brighter than the peak magnitude in the MISAO Project observations, and the J-Ks color becomes greater than 1.0 magnitudes, usually greater than 1.2 magnitudes. Some bright 2MASS data have no valid Ks-band magnitude, and in these instances the J-Ks column is empty. In that case, the bright J-band magnitude and the large difference between it and the unfiltered CCD magnitude indicate that the star is a red variable star. A star satisfying the condition above is classified as a probable SR (semi regular) or M (Mira) type, depending on the magnitude range. In the case of the range being over 2.5 magnitudes, it is classified as M, otherwise as SR. In the type column of the table, SR? (M?) or SR: (M:) is recorded depending on the number of observations at different brightness. In the case where there are three or more observations when the magnitude difference from the others is greater than 0.3 magnitudes, SR: or M: is recorded, otherwise SR? or M? is recorded. All of the 255 new variable stars, except for MisV0049, are identified with 2MASS data whose J-Ks color is greater than 1.0, and classified as red variable stars. MisV0049 has small J-Ks color of 0.804. But the large difference between the J-band and the unfiltered CCD magnitude, i.e. greater than 3 magnitudes, implies that this is a red variable star. This research has made use of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. We extend our appreciation to Brian Skiff and Taichi Kato for comments on the 2MASS J-Ks color and for corrections of mis-identifications. Table: List of New Variable Stars and 2MASS Data Unfiltered CCD Mag. 2MASS 2MASS Code Max Min J Mag. J-Ks Type ----------------------------------------- MisV0005 12.2 14.1 8.656 1.522 SR: MisV0006 11.7 13.2 7.811 1.844 SR? MisV0007 12.6 13.8 9.484 1.395 SR: MisV0008 14.1 15.9 9.593 1.749 SR: MisV0010 13.0 15.8 7.974 1.659 M? MisV0011 11.7 13.6 6.749 1.805 SR: MisV0012 11.8 14.1 8.879 2.095 SR: MisV0013 12.7 [15.6 9.230 1.913 M? MisV0014 11.7 16.3 8.381 1.798 M: MisV0015 12.8 14.3 9.871 1.303 SR? MisV0016 13.4 16.3 9.596 1.838 M? MisV0017 11.1 14.2 8.331 1.625 M: MisV0018 11.8 14.7 8.885 1.503 M? MisV0019 13.9 [16.5 8.916 1.855 M? MisV0020 13.2 15.6 9.802 1.490 M? MisV0021 11.9 15.0 8.936 1.749 M? MisV0022 12.9 17.0 8.990 1.610 M? MisV0023 15.0 16.4 8.522 1.869 SR? MisV0024 13.1 16.2 9.036 1.881 M? MisV0025 13.1 14.8 8.811 2.186 SR? MisV0026 13.5 15.1 9.576 2.200 SR? MisV0027 12.7 [16.5 8.642 1.702 M? MisV0028 13.9 [16.0 9.516 2.522 SR? MisV0029 13.0 [15.9 9.190 1.558 M? MisV0030 13.8 16.4 9.889 1.530 M: MisV0031 14.5 16.1 9.670 1.746 SR? MisV0032 13.6 16.9 9.150 1.668 M: MisV0034 15.5 [17.5 10.833 2.310 SR? MisV0035 14.3 17.0 9.839 1.856 M: MisV0036 14.7 [16.5 9.887 1.758 SR? MisV0038 10.8 12.7 8.440 1.429 SR? MisV0039 11.1 13.8 8.850 1.548 M? MisV0041 12.5 14.6 7.979 2.336 SR? MisV0043 12.4 13.7 7.760 1.512 SR: MisV0044 13.1 [14.4 10.001 1.690 SR: MisV0045 13.6 15.5 8.584 1.555 SR: MisV0048 13.7 [15.4 8.496 1.674 SR: MisV0049 13.9 15.1 10.696 0.804 SR? MisV0050 12.9 15.0 9.299 1.508 SR: MisV0055 13.6 16.4 8.487 1.383 M? MisV0056 12.8 13.5 8.288 1.946 SR? MisV0057 13.4 14.8 8.382 1.642 SR? MisV0058 12.8 14.0 9.691 1.515 SR? MisV0059 12.9 14.0 9.237 1.387 SR? MisV0061 12.4 15.0 9.694 1.722 M: MisV0062 13.9 [15.7 9.306 1.831 SR: MisV0063 13.8 15.2 9.479 1.746 SR? MisV0064 11.7 13.7 9.774 1.694 SR: MisV0065 12.2 14.3 8.531 1.530 SR: MisV0066 11.3 13.9 7.583 1.609 M? MisV0067 13.5 14.8 9.559 1.552 SR: MisV0068 14.1 15.9 9.634 2.067 SR? MisV0069 14.2 [16.1 9.915 2.277 SR? MisV0070 12.5 15.4 8.651 1.697 M: MisV0071 14.1 15.3 9.437 2.237 SR: MisV0072 13.6 15.3 9.210 1.943 SR? MisV0074 14.8 [16.1 8.555 2.236 SR? MisV0075 13.3 15.4 9.314 2.052 SR? MisV0076 13.3 15.8 6.619 1.742 M: MisV0077 12.2 15.2 8.997 1.627 M? MisV0078 14.3 15.2 9.584 1.431 SR? MisV0079 14.1 16.1 9.676 2.124 SR? MisV0080 11.6 13.0 8.566 1.684 SR: MisV0082 13.0 [14.4 9.984 1.590 SR: MisV0083 12.8 14.7 9.298 1.510 SR? MisV0084 12.9 14.8 9.559 1.324 SR: MisV0085 11.8 [14.0 8.263 1.890 M: MisV0086 12.5 13.6 9.338 1.588 SR: MisV0087 11.4 [14.4 9.324 1.537 M: MisV0088 11.6 13.3 7.972 1.602 SR: MisV0089 12.6 13.8 9.651 1.442 SR: MisV0094 13.6 15.2 9.060 1.780 SR? MisV0095 12.7 [14.4 8.559 1.641 SR: MisV0096 13.3 14.6 9.200 1.555 SR? MisV0097 14.8 16.2 8.845 1.766 SR? MisV0098 13.1 14.2 8.841 1.698 SR? MisV0099 13.2 [15.4 8.501 1.828 M? MisV0100 13.2 16.6 9.122 1.650 M? MisV0102 13.8 [15.0 8.789 1.971 SR? MisV0104 11.9 13.5 7.785 1.714 SR? MisV0105 11.9 13.9 7.217 1.535 SR: MisV0106 12.6 14.4 7.847 1.751 SR: MisV0111 10.3 11.7 6.908 1.335 SR: MisV0113 11.6 14.0 7.261 2.171 SR: MisV0118 11.3 12.4 7.280 1.547 SR: MisV0119 10.2 12.0 5.571 SR: MisV0120 12.0 13.1 6.899 2.121 SR? MisV0121 12.6 13.9 9.211 1.435 SR: MisV0123 12.1 13.7 8.009 1.465 SR: MisV0126 11.8 13.4 7.152 1.690 SR: MisV0127 12.4 13.6 7.742 1.651 SR: MisV0128 12.4 13.6 8.835 1.377 SR: MisV0131 12.0 12.8 8.144 1.624 SR: MisV0132 10.7 13.0 7.135 2.076 M: MisV0133 13.0 14.2 8.540 2.904 SR? MisV0134 13.5 [15.3 9.400 1.999 SR: MisV0149 11.1 12.2 6.757 SR: MisV0170 12.5 13.6 7.123 1.600 SR? MisV0171 11.3 13.1 8.147 1.768 SR? MisV0172 13.7 [15.5 8.713 2.394 SR: MisV0173 12.4 13.7 7.580 1.957 SR: MisV0174 12.2 13.4 6.226 SR? MisV0175 11.0 14.4 7.557 1.910 M: MisV0199 12.9 14.5 7.963 1.631 SR: MisV0200 11.5 12.5 6.525 1.657 SR: MisV0201 13.9 14.9 7.717 1.868 SR? MisV0202 12.4 14.0 7.769 1.756 SR: MisV0206 12.8 14.6 8.008 1.555 SR? MisV0207 12.4 13.9 7.266 1.801 SR? MisV0208 12.4 13.4 7.010 2.019 SR: MisV0212 12.1 12.9 7.773 1.569 SR: MisV0213 10.9 13.6 7.730 1.436 M: MisV0215 12.1 15.1 8.785 2.244 M: MisV0216 9.5 12.4 6.307 M: MisV0219 11.4 13.4 7.399 1.920 SR? MisV0220 11.0 12.5 7.136 1.998 SR: MisV0223 13.4 15.1 8.569 1.995 SR? MisV0224 11.4 13.0 7.157 2.086 SR? MisV0226 11.1 12.3 6.846 1.890 SR? MisV0227 13.4 15.1 7.389 2.100 SR? MisV0228 12.8 14.8 8.245 2.350 SR: MisV0229 12.8 14.0 8.864 1.886 SR? MisV0232 13.5 15.0 7.402 1.860 SR? MisV0233 13.7 15.2 8.864 2.776 SR? MisV0245 11.2 12.4 7.442 1.675 SR? MisV0246 12.2 13.9 8.239 2.030 SR? MisV0251 11.4 12.4 7.459 1.483 SR? MisV0255 11.8 13.7 6.403 SR: MisV0256 12.0 13.3 7.528 1.783 SR: MisV0257 13.6 14.7 8.858 2.181 SR? MisV0258 10.5 12.3 6.684 1.764 SR: MisV0259 14.2 15.2 8.658 2.186 SR? MisV0260 12.7 13.6 8.664 2.463 SR? MisV0261 11.8 13.9 8.751 1.375 SR: MisV0262 11.2 13.2 9.073 1.491 SR? MisV0263 11.9 [14.3 8.905 1.533 M? MisV0264 12.7 14.0 8.571 1.748 SR? MisV0265 12.0 13.4 8.365 1.416 SR: MisV0268 12.1 13.8 7.755 1.439 SR: MisV0269 13.0 [15.1 9.089 1.562 SR: MisV0274 11.9 14.0 7.786 1.568 SR? MisV0276 11.7 [13.1 8.358 1.355 SR: MisV0277 11.7 12.8 9.085 1.924 SR? MisV0278 10.7 13.1 7.852 1.888 M: MisV0279 11.1 12.0 7.339 1.488 SR: MisV0280 11.2 [14.2 7.998 1.790 M: MisV0300 10.5 12.6 7.569 1.704 SR: MisV0303 10.9 12.4 5.981 1.394 SR? MisV0305 12.8 13.6 8.395 1.702 SR? MisV0306 11.2 13.2 8.106 1.543 SR? MisV0307 12.3 13.2 8.577 1.442 SR? MisV0308 12.9 13.7 9.592 1.396 SR? MisV0309 10.2 12.3 8.479 1.362 SR? MisV0311 12.8 14.2 9.820 1.364 SR? MisV0312 11.1 13.1 7.872 1.414 SR? MisV0313 12.5 14.1 8.851 1.656 SR? MisV0315 11.3 13.0 8.788 1.433 SR: MisV0316 10.8 11.7 9.073 1.281 SR? MisV0317 10.9 13.7 8.014 1.419 M: MisV0318 9.8 11.0 8.225 1.370 SR? MisV0319 12.1 12.9 9.983 1.357 SR? MisV0320 11.6 12.9 8.223 1.407 SR: MisV0321 11.0 12.4 9.251 1.181 SR: MisV0322 11.4 13.4 8.560 1.488 SR? MisV0323 11.2 11.9 8.404 1.375 SR: MisV0324 11.6 13.9 9.356 1.184 SR: MisV0325 12.4 13.8 10.486 1.275 SR? MisV0326 11.2 13.8 9.598 1.514 M: MisV0329 11.6 14.9 8.935 1.256 M? MisV0332 13.1 14.2 10.339 1.199 SR? MisV0333 12.5 13.6 8.514 1.469 SR? MisV0334 12.9 15.5 10.808 1.374 M: MisV0335 12.2 15.5 9.093 1.465 M: MisV0336 11.3 13.5 8.899 1.590 SR: MisV0342 10.3 11.1 6.288 1.499 SR? MisV0343 13.0 14.2 7.866 1.758 SR: MisV0344 12.9 14.5 8.515 2.667 SR: MisV0345 13.0 15.3 8.607 1.770 SR: MisV0353 12.6 [14.8 9.569 1.444 M: MisV0354 12.6 [14.8 9.530 1.796 SR: MisV0355 12.8 [14.7 7.847 2.135 SR: MisV0357 12.9 13.7 10.748 1.954 SR? MisV0358 13.2 14.9 8.038 1.665 SR? MisV0359 12.9 13.8 8.413 1.321 SR? MisV0360 12.0 12.9 8.496 1.801 SR: MisV0362 13.1 14.8 7.705 1.867 SR? MisV0365 13.2 15.2 9.865 1.490 SR? MisV0371 13.8 15.2 10.208 1.194 SR: MisV0374 12.9 14.1 9.524 1.369 SR? MisV0382 12.1 [14.5 8.507 1.819 M? MisV0383 12.9 14.4 8.549 1.628 SR: MisV0384 13.0 [14.5 8.842 1.691 SR? MisV0385 12.3 14.2 8.194 1.807 SR: MisV0386 13.2 [14.6 9.087 1.851 SR: MisV0387 12.5 [14.4 7.621 1.761 SR? MisV0390 13.1 15.3 9.355 1.630 SR? MisV0391 13.2 14.5 8.777 2.011 SR: MisV0392 12.6 [15.0 10.123 1.653 M: MisV0395 13.2 [14.2 7.301 2.568 SR? MisV0397 13.1 [14.4 7.552 2.650 SR? MisV0405 10.5 12.8 6.590 1.805 M: MisV0408 12.5 [14.1 6.757 1.945 SR? MisV0409 13.4 [14.1 7.921 1.938 SR? MisV0410 13.2 15.5 7.609 2.773 SR? MisV0411 12.6 14.6 9.232 1.950 SR? MisV0412 13.1 [14.6 7.141 1.894 SR? MisV0413 12.5 14.1 7.005 2.108 SR? MisV0414 14.7 [16.5 8.663 2.198 M: MisV0415 13.2 16.3 7.573 2.021 M? MisV0416 11.9 13.5 7.195 1.768 SR? MisV0417 13.2 [14.1 8.298 2.009 SR? MisV0418 13.2 [14.3 8.013 1.831 SR: MisV0419 12.8 [14.5 7.791 2.144 SR? MisV0420 13.1 [14.5 6.721 SR? MisV0421 13.2 14.3 7.814 1.815 SR? MisV0422 13.0 [14.4 6.752 1.832 SR: MisV0432 10.5 11.8 5.929 SR? MisV0434 12.8 14.3 7.837 1.432 SR? MisV0435 12.6 14.2 7.861 1.821 SR? MisV0436 13.3 14.3 7.259 1.600 SR? MisV0437 11.7 14.8 8.575 1.661 M: MisV0438 11.2 12.1 7.666 1.369 SR? MisV0442 12.8 13.8 8.208 1.710 SR? MisV0443 13.2 14.2 8.411 1.828 SR? MisV0445 11.3 12.6 8.085 1.353 SR: MisV0446 11.8 13.3 8.269 1.371 SR? MisV0450 13.2 14.7 8.600 1.586 SR? MisV0451 12.5 14.7 8.333 1.638 SR? MisV0452 12.0 13.4 8.381 1.480 SR? MisV0453 13.0 15.1 9.095 1.596 SR? MisV0454 13.3 14.5 10.073 1.219 SR? MisV0455 13.1 14.3 9.128 1.455 SR? MisV0460 13.0 [15.2 9.451 1.887 SR? MisV0463 12.9 14.1 10.182 1.400 SR? MisV0464 12.7 14.1 9.662 1.250 SR? MisV0467 12.5 13.9 8.690 1.310 SR? MisV0472 11.9 13.3 7.981 1.520 SR: MisV0473 12.9 [14.0 9.539 1.463 SR: MisV0474 13.1 [14.3 9.015 1.585 SR: MisV0475 9.8 11.9 6.723 1.920 SR? MisV0476 12.5 14.2 7.601 SR: MisV0477 12.6 [14.4 7.138 2.059 SR? MisV0479 10.3 13.7 6.552 M: MisV0480 12.7 14.6 6.151 SR: MisV0481 9.9 12.3 5.681 M: MisV0482 11.8 12.9 6.225 SR: MisV0483 10.1 12.5 5.636 M: MisV0484 12.9 14.1 7.262 1.798 SR: MisV0485 11.7 14.0 6.820 1.945 SR: MisV0486 12.4 [16.0 7.638 3.084 M: MisV0487 11.3 12.2 5.555 SR? MisV0488 12.0 13.9 6.511 SR: MisV0491 12.6 14.6 7.547 SR: MisV0495 11.3 14.0 6.285 M: MisV0499 13.3 14.0 7.321 2.374 SR: ----------------------------------------- References [vsnet-newvar 1479]