NGC 2541 Table 5: Astrometry for the NGC 2541 Cepheids ID X Y RA(J2000) Dec(J2000) Chip C1 778.40 383.03 8:14:39.39 49:01:30.7 PC C2 245.23 69.40 8:14:43.67 49:02:09.5 WF3 C3 236.86 105.11 8:14:43.93 49:02:07.1 WF3 C4 634.67 648.57 8:14:50.68 49:02:14.8 WF3 C5 606.78 383.03 8:14:39.25 49:02:50.3 WF2 C6 283.15 766.84 8:14:44.00 49:03:07.8 WF2 C7 300.92 152.92 8:14:40.82 49:02:15.5 WF2 C8 559.18 536.21 8:14:39.27 49:01:42.8 PC C9 526.92 602.44 8:14:43.80 49:00:40.5 WF4 C10 178.55 725.74 8:14:44.71 49:02:59.9 WF2 C11 229.14 126.18 8:14:44.08 49:02:05.4 WF3 C12 764.46 560.16 8:14:38.75 49:03:13.2 WF2 C13 639.39 344.56 8:14:38.78 49:02:48.5 WF2 C14 299.21 70.01 8:14:43.94 49:02:14.2 WF3 C15 640.66 491.09 8:14:39.49 49:03:01.3 WF2 C16 350.56 773.73 8:14:43.44 49:03:11.7 WF2 C17 375.52 170.34 8:14:44.67 49:01:25.2 WF4 C18 353.98 340.57 8:14:46.58 49:02:05.7 WF3 C19 157.76 103.42 8:14:43.11 49:01:41.7 WF4 C20 260.79 79.30 8:14:40.81 49:02:07.2 WF2 C21 622.43 605.45 8:14:44.62 49:00:35.5 WF4 C22 422.29 259.51 8:14:44.62 49:01:15.2 WF4 C23 146.71 392.39 8:14:43.36 49:02:28.8 WF2 C24 480.66 445.47 8:14:39.82 49:01:43.9 PC C25 676.48 447.00 8:14:38.96 49:02:59.2 WF2 C26 436.86 484.37 8:14:39.76 49:01:46.5 PC C27 647.39 454.90 8:14:39.25 49:02:58.5 WF2 C28 277.12 687.76 8:14:43.66 49:03:00.7 WF2 C29 771.82 435.99 8:14:38.07 49:03:02.8 WF2 C30 101.78 65.83 8:14:42.14 49:01:58.4 WF2 C31 146.16 536.68 8:14:47.27 49:01:38.1 WF3 C32 307.34 64.38 8:14:44.61 49:01:37.7 WF4 C33 161.59 298.56 8:14:42.76 49:02:21.3 WF2 C34 315.08 416.30 8:14:41.99 49:02:39.0 WF2 The Variable Stars ID is the same in this and all subsequent tables. The X and Y coordinate are relative to the 1995 October 30 epoch. For each 800x800 pixels chip, pixel [1,1] is located at the edge of the pyramid. RA and Declination are calculated using the IRAF task STSDAS.HST$\_$CALIB.WFPC.METRIC, version 1.3.5 (July 1996). Notes on the individual Cepheids. In what follows the term `isolated' is used for stars for which no companions are identified within a three pixel radius. C1: Isolated; period too long to be determined; phase averaged magnitudes are calculated for P = 65.0 days. C2: crowded region; equal brightness companion 2.8 pixels away. Period is too long to be determined; phase averaged magnitudes are calculated for P = 59.0 days. C3: at the edge of a very crowded group, even if no other stars are identified within a three pixel radius. Period is too long to be determined; phase averaged magnitudes are calculated for P = 53.0 days. C4: isolated. Period is too long to be determined; phase averaged magnitudes are calculated for P = 61.0 days. C5: two magnitudes fainter companion 2.3 pixels away. Period is too long to be determined; phase averaged magnitudes are calculated for P = 51.5 days. C6: two fainter companions 2.8 and 2.0 pixels away. Phase averaged magnitudes are calculated for P = 50.7 days. C7: 2.3 magnitudes fainter companion 3.0 pixels away. C8: 0.5 magnitudes fainter companion 1.7 pixels away. C9: at the edge of a crowded group, even if no other stars are identified within a three pixel radius. C10: two companions (one of the same brightness and the other one magnitude fainter) 3.0 pixels away. C11: isolated. C12: two companions (0.8 and 1.4 mag fainter) within 2 pixels. C13: isolated. C14: one magnitude fainter companion 1.5 pixels away. C15: three companions at least 1 magnitude fainter 2.1 to 2.6 pixels away. C16: isolated. C17: 0.6 magnitudes fainter companion 1.6 pixels away. C18: isolated. C19: isolated. C20: two at least 1 magnitude fainter stars 2.4 and 2.8 pixels away. C21: isolated. C22: isolated. C23: two magnitudes fainter companion 2.8 pixels away. C24: isolated. C25: two at least 1 magnitude fainter companions within 3 pixels. C26: isolated. C27: 1.4 magnitudes fainter companion 2.8 pixels away. C28: two at least one magnitude fainter companions 2.3 pixels away. C29: isolated. C30: isolated. C31: isolated. C32: isolated. C33: isolated. C34: 1.4 magnitudes fainter companion 2.5 pixels away.