NGC 7078 / C2127+119 / Messier 15 RA: 21:29:58.33 DEC: +12:10:01.2 (J2000) (Most recent updates: Membership probability flag - 2024; Remaining data - September 2014) ============================================================ Bytes Format Explanation 1-8 A8 Star ID 10-32 A11,1x,A11 Position 34-35 A2 Membership probability flag based on data published by Prudil & Arellano Ferro (2024) m1: prob >=0.85; m2: prob >=0.7 and <0.85; m3: prob >= 0.5 and <0.7; f: prob <0.5 u: no data available 37-44 F8.4 Period (days) 46-51 F6.3 Mean magnitude (or maximum magnitude if "max" is indicated in the remarks column) 53-57 F5.3 Light amplitude (range of variability) 59 A1 Colour for mean magnitude and amplitude e.g. B, V, R, I, J, K or P (for photographic). 61-65 A5 Type of variable (draft 2006 GCVS classifications) CST denotes non variable stars previously designated as variables 67-80 A19 Notes and Remarks (f denotes field star) "--" or "----" indicates no data available ========================================================================= ID Position Mem Period ampl C Type Notes/ RA Dec Flag Remarks ========================================================================= 1 21:29:50.20 +12:10:26.9 m1 1.4377 14.954 0.99 V CW 2 21:29:46.53 +12:10:07.4 m1 0.6843 15.585 0.53 V RR0 S&S 3 21:29:41.35 +12:09:14.2 m1 0.3887 15.823 0.52 V RR1 S&S 4 21:29:50.65 +12:07:17.8 m1 0.3136 15.902 0.64 V RR1 S&S 5 21:29:51.53 +12:06:29.2 m1 0.3842 15.789 0.49 V RR1 S&S 6 21:29:59.92 +12:11:19.8 m1 0.6660 15.757 0.94 V RR0 7 21:29:58.98 +12:11:16.8 m1 0.3676 15.754 0.56 V RR1 8 21:29:58.22 +12:12:10.2 m1 0.6462 15.763 0.89 V RR0 9 21:29:59.24 +12:12:21.9 m1 0.7153 15.685 0.84 V RR0 10 21:30:06.85 +12:10:05.5 m1 0.3864 15.856 0.50 V RR1 11 21:30:10.00 +12:09:42.5 m1 0.3433 15.828 0.61 V RR1 S&S 12 21:30:09.35 +12:09:13.1 m1 0.5929 15.825 0.75 V RR0 Bing 13 21:30:06.95 +12:08:55.3 m1 0.5749 15.944 1.01 V RR0 14 21:30:04.14 +12:05:47.3 m1 0.3820 15.893 0.46 V RR1 S&S 15 21:30:03.97 +12:04:59.5 m1 0.5835 15.911 1.04 V RR0 S&S 16 21:30:05.09 +12:12:13.2 m1 0.3992 15.843 0.36 V RR1 17 21:30:03.95 +12:11:53.6 m1 0.4294 15.743 -- V RR01 18 21:30:03.53 +12:11:44.1 m1 0.3677 15.829 0.55 V RR1 19 21:30:05.81 +12:12:44.2 m1 0.5723 15.733 1.38 V RR0 20 21:30:03.79 +12:09:53.8 m1 0.6970 15.751 0.90 V RR0 21 21:30:00.60 +12:09:05.5 m1 0.6476 15.669 0.85 V RR0 22 21:29:35.74 +12:09:14.2 m1 0.7201 15.723 0.82 V RR0 S&S 23 21:30:11.22 +12:14:20.0 m1 0.6327 15.772 0.82 V RR0 S&S 24 21:29:51.01 +12:09:56.1 m1 0.3697 15.859 0.50 V RR1 25 21:30:18.90 +12:09:54.1 m1 0.6653 15.827 0.67 V RR0 Bing 26 21:29:59.70 +12:15:34.6 f 0.4023 15.878 0.39 V RR01 Bing 27 21:30:13.33 +12:14:12.9 m1 ---- -- -- CST Note 28 21:30:19.12 +12:18:59.2 m1 0.6706 15.824 0.75 V RR0 Bing 29 21:30:09.26 +12:13:35.1 m1 0.5749 15.978 1.10 V RR0 S&S 30 21:29:47.03 +12:09:58.0 m1 0.4060 15.683 0.45 V RR01 S&S 31 21:29:50.49 +12:14:07.0 m1 0.4082 15.870 0.43 V RR01 S&S 32 21:29:54.79 +12:11:50.2 m1 0.6044 15.735 0.97 V RR0 33 21:29:55.51 +12:09:34.1 f 0.5839 15.732 1.05 V RR0 34 21:29:54.53 +12:09:07.5 m1 1.1591 15.0 0.4 V EC? Note 35 21:29:56.02 +12:07:19.0 m1 0.3840 15.929 0.53 V RR1 S&S 36 21:29:56.42 +12:08:41.6 m1 0.6242 15.817 0.93 V RR0 37 21:29:56.58 +12:08:45.6 m1 0.2878 15.871 0.53 V RR1 38 21:29:58.85 +12:07:36.9 m1 0.3753 15.820 0.55 V RR1 39 21:29:59.71 +12:07:58.7 m1 0.3896 15.880 -- V RR01 40 21:30:07.27 +12:08:07.1 m1 0.3777 15.867 -- V RR1 41 21:30:02.61 +12:09:08.4 m1 0.3822 15.703 -- V RR1 42 21:30:13.76 +12:09:27.5 m1 0.3602 15.893 0.61 V RR1 S&S 43 21:30:26.62 +12:11:48.4 m1 0.3960 15.864 0.50 V RR1 Bing 44 21:30:04.49 +12:10:07.2 m1 0.5945 15.773 0.81 V RR0 45 21:30:02.83 +12:09:32.1 m1 0.6774 15.651 0.91 V RR0 46 21:30:02.20 +12:10:35.7 m1 0.6915 15.619 0.74 V RR0 47 21:30:01.28 +12:09:59.6 f 0.6875 15.676 0.96 V RR0 48 21:30:02.29 +12:12:33.8 m1 0.3646 15.870 0.63 V RR1 49 21:30:00.95 +12:12:49.3 m1 0.6552 15.872 0.81 V RR0 50 21:30:09.44 +12:11:44.0 m1 0.2981 15.927 -- V RR1 51 21:29:58.67 +12:11:34.4 m1 0.3969 15.816 0.45 V RR01 52 21:30:11.38 +12:09:42.2 m1 0.5756 15.932 0.99 V RR0 S&S 53 21:29:52.05 +12:08:11.9 m1 0.4160 15.822 -- V RR01 54 21:29:59.00 +12:11:31.4 m1 0.3996 15.734 0.48 V RR01 55 21:30:02.76 +12:09:44.7 m1 0.7486 15.732 0.67 V RR0 56 21:30:02.17 +12:10:03.9 m3 0.5703 15.741 1.02 V RR0 57 21:30:03.4 +12:09:08.6 m1 0.3496 15.773 0.58 V RR1 58 21:29:54.50 +12:10:11.4 m1 0.4068 15.825 -- V RR01 59 21:30:01.07 +12:10:45.7 f 0.5546 15.797 1.13 V RR0 60 21:30:01.93 +12:09:04.3 m1 0.7146 15.598 0.61 V RR0 61 21:29:53.73 +12:09:21.4 m1 0.3995 15.794 -- V RR01 62 21:29:53.41 +12:10:41.4 m1 0.3773 15.726 0.53 V RR01 63 21:30:01.59 +12:10:34.2 m1 0.6469 15.753 0.71 V RR0 64 21:29:55.13 +12:10:22.6 m1 0.3642 15.761 0.58 V RR1 65 21:29:51.33 +12:09:24.2 m1 0.7182 15.791 0.54 V RR0 66 21:29:53.65 +12:08:10.6 m1 0.3794 15.882 -- V RR1 67 21:29:52.4 +12:09:52.5 m1 0.4064 15.874 -- V RR01? 68 21:29:56.13 +12:10:15.3 f 0.3771 15.757 0.50 V RR1 69 21:29:55.79 +12:09:37.2 m1 0.5868 15.977 1.03 V RR0 70 21:29:55.98 +12:09:43.6 m1 0.3676 15.844 0.49 V RR1 71 21:29:55.94 +12:09:50.4 m1 0.3737 15.870 0.60 V RR1 72 21:29:58.19 +12:10:37.2 m1 1.1386 15.4 0.8 P Note 73 21:29:58.04 +12:10:23.2 m3 0.3113 15.753 -- V RR1 74 21:30:00.90 +12:08:37.7 m1 0.2960 15.862 0.56 V RR1 75 21:29:58.47 +12:09:32.1 m1 0.3655 15.855 0.50 V RR1 76 21:29:58.37 +12:09:34.3 m3 0.3841 15.864 0.40 V RR1 77 21:29:57.57 +12:09:40.5 m1 0.5960 15.681 0.71 V RR0 Note 78 21:29:57.83 +12:10:50.6 m3 0.6648 15.676 0.89 V RR0 79 21:29:59.80 +12:09:39.6 m1 ---- -- -- CST? Note 80 21:29:55.08 +12:09:36.2 m1 0.6642 15.697 0.72 V RR0 81 21:29:56.83 +12:09:57.9 m1 0.6033 15.791 -- V RR0 82 21:29:56.88 +12:10:04.9 m1 0.3691 15.656 V RR1 83 21:29:59.39 +12:09:56.8 m1 0.7263 15.578 0.95 V RR0 84 21:29:59.51 +12:09:48.9 m1 0.5872 15.989 1.05 V RR0 85 21:29:59.69 +12:10:06.4 f ---- -- -- CST? Note 86 21:29:59.18 +12:10:07.5 m1 16.829 13.18 1.5 V CW Note 87 21:30:00.03 +12:09:39.3 m2 0.3208 15.943 0.65 V RR1 88 21:29:58.43 +12:10:29.6 f 0.6822 15.567 0.80 V RR0 89 21:29:56.70 +12:09:55.8 f 0.3789 15.785 -- V RR1 90 21:30:00.48 +12:10:07.8 m1 0.3823 15.742 0.48 V RR1 91 21:30:02.89 +12:10:31.1 f 0.6235 16.2 1.0 B RR0 92 21:29:59.00 +12:09:37.8 u 0.4120 15.798 V RR1 Note 93 21:30:00.30 +12:09:29.5 m1 0.3970 15.810 0.40 V RR01 94 21:29:58.48 +12:10:31.4 f 0.6630 -- -- RR0 95 21:29:58.81 +12:09:21.7 m3 ---- -- -- CST? Note 96 21:30:09.44 +12:13:38.8 m1 0.3964 15.907 0.38 V RR01 Bing 97 21:29:52.87 +12:10:31.8 m1 0.6963 15.765 0.63 V RR0 98 21:29:53.65 +12:10:47.5 m1 0.4701 15.68 0.55 P RR0 Note 99 21:30:00.33 +12:13:15.7 m1 0.2908 15.811 0.25 V RR1 S&S 100 21:29:59.31 +12:09:24.3 f 0.4104 16.155 -- B RR01 =NV12 101 21:29:50.96 +12:19:02.8 m1 0.4003 15.836 0.50 V RR01 Bing 102 21:30:03.13 +12:10:32.4 m1 0.7594 15.782 0.35 V RR0 =NV10 103 21:29:41.23 +12:05:27.1 m1 0.3682 15.867 0.51 V RR1 Bing 104 21:29:48.27 +11:59:19.3 m1 0.4141 16.0 0.8 P RR01 Note 105 21:29:32.98 +11:57:42.7 m1 0.5712 16.35 1.5 P RR0 f?;Note 106 21:29:56.13 +12:10:17.0 m1 0.3957 -- -- RR01 107 21:29:56.22 +12:09:37.9 f 0.4166 16.229 0.5 B RR1? =NV2 108 21:29:56.23 +12:09:08.6 m3 15.7 0.4 P RR1 Rosino 109 21:29:59.32 +12:09:29.1 m1 0.2993 15.807 0.31 V RR1 =NV14 110 21:30:00.60 +12:09:22.8 m1 15.75 0.5 P RR1 Rosino 111 21:30:01.20 +12:10:03.3 m1 0.4089 16.663 -- B RR01 112 -- -- ---- -- -- =V46;Note 113 21:29:58.77 +12:05:53.1 m1 0.4060 15.698 0.20 V RR1 S&S 114 21:29:58.19 +12:10:53.3 m1 0.3579 -- -- RR1 115 21:29:59.25 +12:09:52.1 f ---- -- 0.7 B Kadla 116 21:29:59.42 +12:09:13.4 m1 0.6101 15.725 0.85 V RR0 =NV5 117 21:29:59.31 +12:09:27.3 f 0.6869 17.019 B RR0 118 21:29:59.63 +12:10:56.0 m1 0.3000 15.836 0.49 V RR01 119 21:29:59.65 +12:10:07.6 f 0.4406 16.046 -- V RR1 120 21:30:00.40 +12:09:57.8 f 0.3584 15.731 0.38 V RR1 =NV7 121 21:29:56.18 +12:12:33.8 m1 ---- -- 0.9 B ? Kadla 122 21:30:15.87 +12:10:26.9 m1 0.0870 15.01 0.2 V ? Note 123 21:29:42.96 +12:09:53.4 m1 15.27 0.2 V ? RGB 124 21:29:50.16 +12:06:40.7 m1 15.24 0.2 V ? RGB 125 21:29:58.31 +12:10:02.9 u 0.7130 15.5 1.3 V LMXB max;Note 126 21:30:10.49 +12:10:06.2 m1 0.1787 13.35 0.04 V ? RGtip 127 21:30:21.10 +12:11:32.9 f ---- 15.67 0.14 V ? f?;Note 128 21:29:58.41 +12:10:02.3 f 0.3892 14.881 0.220 V RR01? TuCo 129 21:29:57.85 +12:09:49.0 m1 0.6895 15.573 0.300 V RR0 TuCo 130 21:29:57.87 +12:09:52.3 m1 0.6456 15.347 -- V RR0 131 21:29:57.86 +12:10:00.8 f 0.3774 15.653 0.80 B RR1? 132 21:29:57.85 +12:10:03.0 f 0.4002 16.038 0.280 V RR01 TuCo 133 21:29:57.97 +12:10:03.5 f 0.4103 15.984 0.270 V RR01 Tuair 134 21:29:58.03 +12:09:59.3 f 0.6248 15.620 0.250 V RR0 TuCo 135 21:29:58.13 +12:09:55.8 m1 0.3619 15.495 0.200 V RR1 Tuair 136 21:29:58.18 +12:10:07.3 u 0.7232 15.578 0.250 V RR0 TuCo 137 21:29:58.29 +12:10:05.6 m1 0.5388 15.792 0.210 V RR1 TuCo 138 21:29:58.48 +12:10:00.9 f 0.7290 15.689 0.350 V RR0 TuCo 139 21:29:58.43 +12:10:11.5 m1 0.3239 15.906 0.55 B RR1 =ZK44 140 21:29:58.62 +12:10:02.4 f ---- -- -- CST? Note 141 21:29:58.97 +12:10:03.6 u 0.3644 15.533 -- V RR1 142 21:29:58.60 +12:10:01.0 f 1.2266 15.161 1.510 V CW TuCo 143 21:29:58.62 +12:09:43.9 m1 ---- -- -- CST Note 144 21:29:59.30 +12:10:01.4 f 0.2985 15.392 0.180 V RR1 TuCo 145 21:29:59.34 12:10:03.2 f 0.4182 15.740 0.720 V RR01 TuCo 146 21:29:59.14 +12:10:01.1 f ---- -- -- CST Note 147 21:29:58.87 +12:09:59.5 f ---- -- -- CST Note 148 21:29:58.07 +12:10:02.1 m1 ---- -- -- CST Note 149 21:29:58.49 +12:10:09.0 m1 ---- -- -- CST Note 150 21:29:58.74 +12:10:13.1 f ---- -- -- CST Note 151 21:29:57.84 +12:10:01.5 f ---- -- -- CST Note 152 21:29:58.43 +12:10:12.0 m1 0.4288 15.784 0.410 V RR1? Tuair 153 21:29:57.99 +12:10:08.4 f ---- -- -- CST Note 154 21:29:58.11 +12:10:13.3 m3 ---- -- -- CST Note 155 21:29:57.61 +12:10:09.8 m1 ---- -- -- CST? Note 156 21:29:39.40 +12:11:43.4 m1 0.0406 18.445 0.150 V SXPHE Note 157 21:30:21.06 +12:09:09.3 f 0.2331 20.246 0.8 V EC 158 21:29:52.25 +12:06:11.2 m1 0.2358 19.791 0.5 V EC 159 21:29:58.35 +12:10:02.6 u 0.6933 -- -- RR0 3stars 160 21:29:58.10 +12:09:48.6 m1 0.3531 15.741 -- V RR1 =ZK52 161 21:29:58.51 +12:09:49.5 u 0.5573 15.785 1.210 V RR0 TuCo;=ZK39 162 21:29:59.55 +12:09:50.0 f 0.7337 16.159 0.85 B RR0 =ZK18 163 21:29:59.25 +12:09:52.3 f 0.5538 15.674 -- V RR0 164 21:29:58.59 +12:10:05.9 f 0.4275 16.028 0.260 V RR1 Note;=ZK37 165 21:29:58.79 +12:10:03.7 f 0.6251 15.837 0.310 V RR0 TuCo;=ZK32 166 21:29:59.38 +12:10:01.1 f 0.3656 15.424 0.53 V RR1 =ZK22 167 21:29:59.83 +12:10:03.7 f 0.3192 15.531 -- V RR1 168 21:29:59.72 +12:10:05.8 f 0.6029 15.717 -- V RR0 169 21:29:59.36 +12:10:09.0 f 0.5549 15.807 1.00 V RR0 =ZK23 170 21:29:58.81 +12:09:21.9 m3 0.6781 15.713 0.63 V RR0 171 21:29:59.82 +12:09:40.0 m1 0.5527 15.801 -- V RR0 172 21:29:59.94 +12:09:49.1 u 0.4317 15.112 0.20 V RR01 =ZK13 173 21:30:00.06 +12:10:01.8 f 0.3784 15.737 0.46 V RR1 =ZK11 174 21:30:00.20 +12:10:13.5 u 0.4006 15.234 0.21 V RR01 TuCo;=ZK10 175 21:30:00.48 +12:10:13.6 m1 0.7540 15.854 0.30 V RR0 TuCo;=ZK6 176 21:29:57.65 +12:10:09.3 f 0.6075 16.061 0.48 V RR0 Tuair 177 21:29:57.67 +12:10:14.9 f 0.4116 15.578 0.32 V RR1 =ZK64 178 21:29:58.02 +12:10:19.3 m3 0.4009 15.741 0.34 V RR01 =ZK55 179 21:29:58.07 +12:10:22.4 m3 0.5630 16.010 0.24 V ? Tuair 180 21:29:58.47 +12:10:28.7 f 0.3969 16.030 0.23 V ? Tuair 181 21:29:59.81 +12:10:25.1 f 0.4010 16.013 -- B RR01 =ZK14 182 21:30:02.87 +12:10:08.8 u 0.3914 -- -- RR1 ZK3 21:30:01.17 +12:10:11.0 m1 0.6310 -- -- RR0 ZK4 21:30:00.91 +12:09:56.1 f 0.3829 15.801 0.45 V RR1 ZK5 21:30:00.87 +12:09:56.8 f 0.3647 15.751 0.55 V RR1 ZK34 21:29:58.75 +12:09:28.7 m1 0.2977 15.760 -- V RR1 ZK47 21:29:58.32 +12:10:01.0 f ---- -- -- ? Note ZK62 21:29:57.76 +12:09:54.2 u 0.0522 -- 0.25 R SXPHE Note ZK63 21:29:57.81 +12:10:21.0 m1 0.4020 15.587 0.35 V RR01 ZK67 21:29:57.45 +12:09:43.6 m1 0.5709 16.340 1.40 B RR0 ZK68 21:29:57.05 +12:10:03.1 f 0.0764 -- 0.20 R SXPHE Note ZK69 21:29:57.13 +12:10:21.4 m1 0.4168 16.085 0.40 B RR01 ZK74 21:29:56.25 +12:10:30.9 m3 0.3197 15.787 0.53 V RR1 ZK78 21:29:55.90 +12:10:27.8 m1 0.4256 15.727 0.36 V RR1 ZK80 21:29:55.86 +12:10:09.2 f 0.3873 15.781 0.37 V RR1 NV1 21:29:53.93 +12:11:13.6 m1 0.0585 17.933 -- V SXPHE NV3 21:29:58.50 +12:10:40.2 f 0.4210 15.658 0.40 V RR01? NV4 21:29:58.59 +12:09:02.7 u 0.3776 -- -- V RR1 NV6 21:30:02.69 +12:10:31.9 m1 0.3909 15.773 0.32 V RR1 NV8 21:30:00.84 +12:09:43.4 f 0.6294 -- -- RR0 NV9 21:30:02.93 +12:10:09.5 m1 0.3915 15.813 0.45 V RR1 NV11 21:29:59.55 +12:09:23.6 f 0.2957 16.257 -- B RR01 NV13 21:30:00.03 +12:09:39.3 m2 0.3208 16.155 -- B RR1? K757 21:30:00.91 +12:08:56.8 m1 250.0 12.58 0.15 V L K825 21:30:02.23 +12:11:21.5 m1 350.0 12.69 0.15 V L X-1 -- -- ---- -- -- =V125;Note X-2 21:29:58.13 +12:10:02.6 m1 0.0157 -- -- LMXB Note CV1 21:29:58.37 +12:10:00.8 f ---- 17.60 -- U UG? Note CV2 21:29:57.34 +12:10:43.7 m1 ---- 20.24 -- U UG? Note PSR -- -- -- -- -- -- u ---- -- -- 11 msPs PSR -- -- -- -- -- -- u ---- -- -- 3 "slow" =================================================================== Supplementary Notes A major study of the RR Lyrae variables in M15 was published by Corwin et al. (2008). Consequently, most of the data listed for the RR Lyrae and Cepheids in the above table are from the Corwin paper. If an RR Lyrae or Cepheid was not studied by Corwin et al., the data are from the discovery paper or from the source indicated in the "Notes on individual stars" or in the "Remarks" column where: "S&S" refers to Silbermann & Smith (1995), "Bing" refers to Bingham et al. (1984), "Rosino" refers to Rosino (1969), "Kadla" refers to Kadla et al. (1984) Samus et al. (2009) published the RA and dec for the stars investigated in the 4 papers listed above. "Tuair" refers to Tuairisg et al. (2003) who derived the RA & dec in addition to the other elements. and "TuCo"indicates that the positions, periods and variability types are from Corwin et al. (2008) and the mean magnitudes and amplitudes are from the paper by Tuairisg et al. (2003). Corwin et al. (2008) also pointed out that there is some overlap among the variables listed by different authors. This confusion occurred because Tuairisg et al. (2003) and Zheleznyak & Kravtsov (2003) were writing their papers at the same time. These identities are indicated in the Notes/Remarks column. The data for V122, V123, V124, V125 (=X-1, AC211), V126, V127, V156, V157, V158, ZK47, ZK62, ZK68, K757, K825, X-2, CV1, CV2 are from their discovery papers unless indicated otherwise in the notes. An identification chart and catalogue of x,y positions for most variables numbered up to 123 was publishd by Kadla et al. (1988). Please note, however, that Kadla's V113, 114, 122 and 123 are not the same stars as the ones listed in the above table. Their V113 is our V122 and their V114 is NV3. Kadla's V122 and V123 refer to Kustner #880 and #263 and are not listed in the table because their variability has not been confirmed in other investigations. Both stars were located in the field of view of the investigation of Corwin et al. (2008), but were not detected as variables. Kustner (1921) listed x,y positions for 1137 stars in M15. His catalog numbers have been cited by many authors. ================= Notes on individual stars V27: The "CST" status for V27 is from Rosino (1950) V34: The magnitude and amplitude for V34 is from Arellano Ferro et al. (2006) and the RA, dec, period and variability type are from Corwin et al. (2008) V46: This appears to be the same star as V112. See the comment for V112. V72: Period, magnitude, amplitude and variability type are from Notni & Oleak (1958). They pointed out that an alternate period is 0.5984. They classified the star as a Bailey type a RR Lyrae, but if the 1 day period is correct, this is unlikely. V77, V92: Tuairisg et al. (2003) published data for V77 and V92, but according to their ID chart, the stars they labelled as V77 and V92 are not the same stars that Rosino (1950) identified as V77 and V92. A comparison of their RA & dec with the ones listed by Corwin et al. (2008) indicates that Tuairisg interchanged the coordinates for these two stars. V79, V85, V95: Rosino (1950) announced these variables, but no elements have been published. Zheleznyak & Kravtsov (2003) confirmed that they vary, but none of them were discussed by Corwin et al. (2008), even though all were in their field. Tuairisg et al. (2003) noted that they did not detect variability in V85, even though it was in their field. V86: The period, magnitude and amplitude listed for V86 are from Fusi Pecci et al. (1980). The RA and dec are from Corwin et al. (2008). V98: Period, magnitude, amplitude and variability type are from Notni & Oleak (1958). V104, V105: All the data listed for V104 and V105 are from the paper by Tsoo (1961), except the RR01 classification for V104 which is from Barlai (1989) V112: Kadla et al. (1988) noted that this star might be V46. According to Sawyer Hogg's (1973) 3rd catalog, their max and min magnitudes and x, y postions are similar: 15.40-16.32, +56.0, +33.2 for V46 and 15.3-16.3, +55.5, +35.0 for V112. Thus we conclude that they are the same star. Kadla et al. also suggested that V47 and V111 might be one star, but that seems unlikely. Corwin et al. (2008) found a separation of about 4 arcsec and derived periods for both. V122: Chu (1977) derived a 2 hour period for V122, but this was not confirmed in subsequent investigations. Smith et al. (1979) did not detect significant short-period variations. Liller & Schommer (1980) commented that there might be a significant difference in mean magnitude on different nights, but found no evidence for variations on the 2 hour time scale. In the CMD, the star is located about V ~ 0.8 mag brighter than the HB at the blue end of the instability strip. Smith et al. (1979) noted that radial velocity and proper motion investigations indicate that the stars is a cluster member. V125 (AC 211 or X-1): The RA & Dec are Kulkarni's values for AC 211, reported by White & Angelini (2001). The remaining data listed for V125 are from page 148-149 of the paper by Ilovaisky (1993). V127: Yao & Qin (1993) derived two possible periods (0.51 and 0.09 days, repsectively) and showed that the star is located on the CMD at a position B-V ~0.15 redward of the GB, indicating that it might be a field star. This was confirmed by Prudil & Arellano (2024). V128, V129, 132, V134, V136, V137, V138, V142, V161, V165, V174, V175: The positions, periods and classifications for these stars are from Corwin et al. (2008). Their V magnitudes and amplitudes are from Tuairisg et al. (2003). V140, V155; These two stars were classified as variables by Butler et al. (1998), but were not detected as variables in the follow up paper by Tuairisg et al. (2003) who noted that there were a number of errors in the analysis of Butler et al. Furthermore, they were not recovered by Corwin et al. (2008) even though they were in their field of view. Therefore the variability of these two stars is doubtful. V143, V146, V147, V148, V149, V150, V151, V153, V154: The RA and dec for these stars were derived by Samus et al. (2009). Zheleznyak & Kravtsov (2003) derived their x,y coordinates, but also noted (see page 604 in their paper) that they did not detect light variations in any of them. Their non-variable status was confirmed by Tuairisg et al. (2003). V156: The period, mean magnitude and (maximum) amplitude listed above are from Jeon et al. (2001a). V164: Corwin et al. (2008) concluded that this is the same variable as ZK37, but were unable to derive a period that phased the data well so the data listed above are from Tuairisg et al. (2003). ZK47: Zheleznyak & Kravtsov (2003) were unable to classify this variable. The RA and dec listed above were derived from their published values for the star's x,y coordinates and RA and dec of the cluster centre. They indicate that the star is located less than 1 arcsec from CV1. Thus it is possible that ZK47 is the same star as CV1. ZK62, ZK68: RA, dec, period, amplitude and variability type are from Kravtsov & Zheleznyak (2003) X-2: The RA, dec and classification are from White & Angelini (2001) who identified a blue U=18.6 magnitude stars as the optical counterpart. The orbital period was derived by Dieball et al. (2005) from HST FUV observations. The FUV amplitude was 0.124 mag. CV1 and CV2, the cataclysmic variables: RA, dec, magnitude and variability type is from Hannikainen et al. (2005). CV1 is their source A and CV2 is source C. ================================================= Discovery of the variable stars in M15: V1-51 Bailey (1902) with ID chart V52-66 Bailey et al. (1919) with x,y positions and ID chart for V1-66 V67-95 Rosino (1950) with x,y positions and ID chart V96-98 Izsak (1952) with Kustner numbers, x,y positions and ID chart V99=Kustner 717 Mannino (1956) with x,y position and Kustner number V100-102 Notni & Oleak (1958) with x,y positions for V100, 101, 102 and Kustner numbers (626 and 867) for V100 and V102 V103-105 Tsoo (1961) with x,y positions and ID chart Note: Tsoo (1961) and Chu (1977) are the same person. V106-112 = Kustner 438, 424, 425, 633, 726, 777, 822 Rosino (1969) with x,y positions and Kustner numbers He also listed magnitude ranges and concluded that these variables were all RR Lyrae type. V113 Silbermann & Smith (1995) with x,y position (on p707) and an ID chart When Kadla et al. (1984a) announced the discovery of V114-121, they designated Kustner #1082, a variable announced by Chu (1977) as V113, but in this catalogue, Chu's variable has been designated as V122. V114-121 Kadla et al. (1984a) with x,y positions They also pointed out that V114=Kustner 537, V118=K657, V120=K715, and V121= K431. However, the x,y coordinates (0.91, 49.93) that they listed for V114 were not the coordinates that Kustner published for K537 ( wich were -8.56, -23.94). Later they published an erratum (Kadla et al. 1984b) and noted that V114 should have been Kustner #579. V114 in the above table is the variable that Corwin et al. (2008) discovered at a position 2.69 arcseconds from the x,y position originally listed for V114 by Kadla et al. (1984a). The "other V114" (Kadla et al. 1984b) is Corwin's NV3. V122=Kustner 1082 Chu (1977) with x,y position and ID chart He noted that x,y were measured relative to RA 21:27.6 and dec +11:57 (1950) The number V122 was assigned in the original electronic version of this catalogue (Clement 1997). V123&124 = Kustner 64 & 152 Chu et al. (1984) with ID chart The numbers V123 and V124 were assigned in the electronic (Clement et al. 2001). V125 = AC211 Auriere et al. (1984) showed that this star was the optical counterpart of the M15 X-ray source: X2127+119 The number V125 was assigned in the electronic (Clement et al. 2001). V126 =Kustner 1040 = S6 in ID chart of Sandage (1970) Its variability was discovered by Yao (1990). The number V126 was assigned in the electronic (Clement et al. 2001). The RA and dec are from Samus et al. (2009) V127 = Kustner 1098 Yao & Qin (1993) with x,y position The number V127 was assigned in the electronic (Clement et al. 2001). The RA and dec are from Samus et al. (2009) V128-142 = HST V1-11 and HST V13-16 Ferraro & Paresce (1993) with x,y pixel positions The variability of HST V12 was not confirmed by Butler et al. (1998) or by Tuairisg et al. (2003). The numbers V128-142 were assigned to these stars in our electronic catalog (Clement et al. 2001). Zheleznyak & Kravtsov (2003) later pointed out that the x-y (arcsec) coordinates we listed for these stars were erroneous and published the correct values. V143-155 = Butler #135, 1856, 2283, 2411, 2954, 7229, 7516, 7600, 7964, 8807, 9245, 10039 & 10837 Butler et al. (1998) with x,y pixel positions The numbers V143-155 were assigned to these stars in our electronic catalog (Clement et al. 2001). Zheleznyak & Kravtsov (2003) later pointed out that the x-y (arcsec) coordinates listed for these stars in the electronic catalogue were erroneous and published the correct values. V156 = SX1 Jeon et al. (2000) with RA, dec and ID chart The number V156 was assigned to this star in our 2001 electronic catalog. V157 & 158 = W1 & W2 Jeon et al. (2001b) with RA, Dec and ID chart The numbers V157 & 158 were assigned to these stars in our 2002 update to the electronic catalog. V159-181 Tuairisg et al. (2003, MNRAS 345, 960) with RA, dec and ID chart. V159 is a blend of V17, 18 & 19 of Ferraro & Paresce (1993). ZK variables Zheleznyak & Kravtsov (2003) with x,y positions Corwin et al. (2008, AJ 135, 1459) found that some of the ZK variables were announced by Tuairisg et al.: ZK6=V175, ZK10 = V174, ZK11=V173, ZK13=V172, ZK14= V181, ZK18=V162, ZK22=V166, ZK23=V169, ZK32=V165, ZK37=V164, ZK39= V161, ZK44=V139, ZK52=V160, ZK55=V178 and ZK64=V177. For these stars, we have adopted the Tuairisg numbering system and the ZK numbers are listed in the "Remarks" column. NV variables Corwin et al. (2008) with RA & dec They listed 14 variables: NV1-14 A comparison of RA and dec derived by Samus et al. (2009) for previously known variables indicates that NV2=V107, NV5=V116, NV7=V120, NV10=V102, NV12=V100, and NV14=V109. K757, K825 McDonald et al. (2010) with RA, dec and Kustner number X-2 White & Angelini (2001) with RA and dec CV1 Charles et al. New Astron. 7, 21 (2002) with ID chart These authors discovered two additional variables thought to be RR Lyrae variables. They labelled them on their ID chart. CV2= Source C Hannikainen et al. (2005) with RA & dec and ID chart PSR: According to Paulo Freire's website at the Max Planck Institute in Bonn (July 2024 version), there are 11 millisecond pulsars and 3 slow pulsars in NGC 7078 (M15). ------------------ Additional variables: Dieball et al. (2007) detected 4 known (+ 13 candidate) RR Lyrae, 1 known (+ 6 candidate) Cepheids, 1 known (+ 1 candidate) SXPHE near the centre of M15 from FUV and NUV observations obtained with HST. They labelled them all on an ID chart. 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