NGC 7331 Cepheid Parameters
  ID chip    RA (J2000)  Dec         X      Y    P_ALF   <V>_ALF    <V-I>_ALF  P_Doph   <V>_Doph  <V-I>_Doph
V  1  2  22:36:59.61  +34:28:20.1  296.3   75.1  42.59  25.40 0.06  1.08 0.09  42.18  25.53 0.04  0.89 0.09
V  2  2  22:36:56.52  +34:28:42.2  661.8  322.1  21.19  25.68 0.06  0.50 0.10  21.35  25.81 0.04  0.54 0.09
V  3  2  22:36:58.30  +34:28:45.9  437.8  340.7  13.91  26.93 0.08  0.95 0.16  13.91  26.91 0.06  0.94 0.17
V  4  2  22:36:58.82  +34:28:47.4  372.4  350.4  22.60  26.13 0.05  1.20 0.08  22.60  26.14 0.04  1.12 0.08
V  5  2  22:37:00.23  +34:29:26.7  162.1  732.2  33.94  26.16 0.05  1.10 0.08  33.87  26.02 0.04  1.30 0.09
V  6  2  22:36:59.92  +34:29:28.2  199.8  750.4  29.05  25.62 0.05  0.91 0.08  29.43  26.02 0.06  0.81 0.12
V  7  3  22:37:01.81  +34:28:41.3  265.1   88.9  39.90  25.89 0.04  1.08 0.09  39.72  25.86 0.03  1.22 0.06
V  8  3  22:37:02.74  +34:28:51.7  360.3  212.1  11.13  27.37 0.13  0.97 0.23  11.16  27.47 0.12  1.40 0.20
V  9  3  22:37:03.13  +34:28:57.1  410.6  265.2  24.41  26.20 0.06  1.27 0.10  25.83  26.37 0.04  1.52 0.07
V 10  4  22:37:03.41  +34:28:07.9  261.1  163.3  11.61  27.02 0.11  1.05 0.25  11.61  26.96 0.09  1.04 0.22
V 11  4  22:37:04.53  +34:27:27.8  371.8  575.5  19.82  26.28 0.06  0.93 0.14  19.86  26.15 0.05  0.98 0.11
V 12  4  22:37:04.53  +34:27:25.6  369.7  597.4  24.82  25.68 0.05  0.86 0.09  26.68  25.65 0.05  0.99 0.10
V 13  4  22:37:03.80  +34:27:06.9  266.6  779.3  41.20  25.92 0.05  1.27 0.10  37.54  25.92 0.05  1.16 0.11