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 <mag>  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.
   A number of these variables have also been detected by Diaz-Sanchez et
   al. (2012) from high-resolution I-band imaging of the core.
------------------
Kraemer et al. (2013) announced that they are making optical and 
near-infrared observations in order to identify the long period variables 
on the AGB.
=====================================================================
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