Table 1.
HST observations of the NGC 5128 halo fields.
| Field | Date | Prg. | Exptime | Exptime | HST | RA | Dec | E(B − V) | R | θa | a/Re |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ID (1) | yyyy-mm | ID | F814W | F606W | camera | J2000 | J2000 | (mag) | (kpc) | (deg) | |
| (s) | (s) | hh:mm:ss | dd:mm:ss | ||||||||
| F1 | 1999-06 | 8195 | 12 100 | 17 500 | WFPC2/PC | 13:24:51 | −43:04:33 | 0.121 | 8.3 | 152.0 | 1.8 |
| F2 | 1997-08 | 5905 | 12 800 | 12 800 | WFPC2/WF | 13:25:29 | −43:19:09 | 0.115 | 20.0 | −144.2 | 4.8 |
| F3 | 1999-07 | 8195 | 17 500 | 17 800 | WFPC2/WF+PC | 13:25:16 | −43:28:01 | 0.123 | 29.9 | −149.5 | 6.8 |
| F4 | 2002-07 | 9373 | 30 880 | 30 880 | ACS/WFC | 13:25:15 | −43:34:30 | 0.123 | 37.1 | −149.0 | 8.4 |
| F5A | 2013-05 | 12964 | 2137 | 2270 | ACS/WFC | 13:27:32 | −42:12:24 | 0.115 | 59.8 | 10.0 | 11.0 |
| F5W | 2013-05 | 12964 | 2376 | 2496 | WFC3/UVIS | 13:28:01 | −42:14:37 | 0.113 | 60.5 | 3.9 | 10.8 |
| F6A | 2013-01 | 12964 | 2137 | 2270 | ACS/WFC | 13:29:19 | −41:56:51 | 0.141 | 85.7 | 1.7 | 15.2 |
| F6W | 2013-01 | 12964 | 2376 | 2496 | WFC3/UVIS | 13:29:10 | −41:51:21 | 0.139 | 90.0 | 4.8 | 16.0 |
| F7A | 2013-06 | 12964 | 2137 | 2270 | ACS/WFC | 13:31:12 | −41:11:57 | 0.091 | 140.5 | 5.0 | 25.0 |
| F7W | 2013-06 | 12964 | 2376 | 2496 | WFC3/UVIS | 13:31:29 | −41:16:45 | 0.093 | 137.8 | 2.7 | 24.4 |
| F8A | 2013-05 | 12964 | 2137 | 2270 | ACS/WFC | 13:22:52 | −42:44:49 | 0.139 | 36.5 | 95.1 | 11.9 |
| F8W | 2013-05 | 12964 | 2376 | 2496 | WFC3/UVIS | 13:23:20 | −42:47:10 | 0.143 | 30.3 | 94.1 | 9.9 |
| F9A | 2013-01 | 12964 | 2137 | 2270 | ACS/WFC | 13:20:42 | −42:35:19 | 0.158 | 64.9 | 98.7 | 21.1 |
| F9W | 2013-01 | 12964 | 2376 | 2496 | WFC3/UVIS | 13:20:30 | −42:30:00 | 0.144 | 69.9 | 95.2 | 22.8 |
| W1 | 2015-08 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:30:21 | −41:58:43 | 0.110 | 91.8 | −5.7 | 16.4 |
| W2 | 2016-01 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:29:51 | −41:47:41 | 0.112 | 97.9 | 1.8 | 17.3 |
| W3 | 2015-06 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:23:18 | −41:51:02 | 0.110 | 82.3 | 53.7 | 23.4 |
| W4 | 2015-06 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:20:08 | −42:03:27 | 0.107 | 91.6 | 80.4 | 29.6 |
| W5 | 2015-06 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:26:12 | −41:09:35 | 0.094 | 124.3 | 30.84 | 28.2 |
| W6 | 2016-01 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:26:29 | −42:38:31 | 0.096 | 28.1 | 8.6 | 5.1 |
| W7 | 2015-06 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:27:07 | −43:03:44 | 0.089 | 20.2 | −63.1 | 6.2 |
| W8 | 2015-04 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:26:51 | −43:30:40 | 0.099 | 36.9 | −117.7 | 11.1 |
| W9 | 2015-04 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:24:33 | −43:25:25 | 0.114 | 29.1 | −167.4 | 5.5 |
| W10 | 2015-04 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:24:29 | −43:23:30 | 0.116 | 27.5 | −170.6 | 5.0 |
| W11 | 2015-06 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:24:39 | −43:19:50 | 0.115 | 23.0 | −170.4 | 4.2 |
| W12 | 2015-04 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:24:40 | −43:19:37 | 0.115 | 22.7 | −170.2 | 4.2 |
| W13 | 2015-06 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:21:57 | −43:08:40 | 0.130 | 43.5 | 136.1 | 11.4 |
| W14 | 2016-01 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:24:06 | −42:03:37 | 0.106 | 66.1 | 49.5 | 18.1 |
| W16 | 2015-06 | 13856 | 1278 | 1210 | WFC3/UVIS | 13:30:06 | −43:35:15 | 0.117 | 67.8 | −88.8 | 22.3 |
| F10A (2) | 2018-04 | 15426 | 2228 | 2379 | ACS/WFC | 13:17:47 | −44:12:24 | 0.096 | 121.8 | 165.2 | 23.4 |
Notes. Columns RA and Dec report the center of the field coordinates, E(B − V) is the reddening value toward the field center based on Schlegel et al. (1998) reddening maps, and R is the projected radial distance in kpc from the center of the galaxy. In the last two columns, θa is the azimuthal angle of the field location measured clockwise from the isophotal major axis (see Fig. 1), while a is the semimajor axis of the elliptical isophote that goes through the field (assuming e = 0.54 ellipticity) in units of Re = 305″ = 5.6 kpc.
Our numbering of the Wxx fields in the first column (Field ID) follows the MAST Archive listing, in which there is no “W15”.
The field F10A listed at the bottom is used as a background control field (see Sect. 3.2).
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