Table 2
Source sample of the 22 GHz H2O maser search.
| Source | Epoch | Position | V sys | 1σS22 | S 22 | L 22 | L 1.6 | N H | Notes |
| (α2000δ2000) | (km s-1) | (mJy) | (mJy) | (L⊙) | (L⊙) | (cm-2) | |||
|
|
|||||||||
| 01 IRAS 00160-0719a | 3 | 00:18:35.9 –07:02:56.0 | 5396 | 2.9 | <8.7 | <2.06 | Sy2+HII | ||
| 02 ESO 350-IG038a | 3 | 00:36:52.7 –33:33:17.0 | 6175 | 4.6 | <13.8 | <4.48 | pair, LIRG, HII/SB | ||
| 03 IRAS 00494-3056a | 3 | 00:51:51.8 –30:40:00.0 | 15529 | 5.3 | <15.9 | <34.86 | SB, ULIRG | ||
| 04 NGC 0315a | 3 | 00:57:48.9 +30:21:09.0 | 4942 | 3.0 | <9.0 | <1.54 | 5.0 × 1022 | LINER(?), jet | |
| 05 NGC 0526A | 1 | 01:23:54.4 –35:03:56.0 | 5725 | 4.3 | <12.9 | <3.62 | 2.0 × 1022 | Sy1.9 | |
| 06 IRAS 01418+1651 | 3 | 01:44:30.5 +17:06:05.0 | 8225 | 2.9 | <8.7 | <5.11 | 245.0 | Sy2, LIRG | |
| 07 NGC 0833 | 1 | 02:09:20.8 –10:08:59.0 | 3864 | 2.9 | <8.7 | <1.05 | 2.7 × 1023 | Sy2/LINER | |
| 08 NGC 0925a | 3 | 02:27:16.9 +33:34:45.0 | 553 | 2.7 | <8.1 | <0.03 | LLAGN | ||
| 09 IC 1858a | 1 | 02:49:08.4 –31:17:22.0 | 6070 | 3.5 | <10.5 | <3.41 | LINER(?) | ||
| 10 IRAS 02580-1136 | 1 | 03:00:30.6 –11:24:57.0 | 8962 | 3.5 | <10.5 | <8.37 | 5.6 × 1023 | Sy2+HII, merger | |
| 11 NGC 1167a | 1 | 03:01:42.4 +35:12:21.0 | 4945 | 2.7 | <8.1 | <1.70 | 3.0 × 1021 | Sy2/LINER, jet | |
| 12 NGC 1275a,b | 3 | 03:19:48.1 +41:30:42.0 | 5264 | 26.4 | <79.2 | <17.73 | 1.5 × 1022 | Sy1.5 | |
| 13 IRAS F04023-1638a | 1 | 04:04:40.6 –16:30:14.0 | 8643 | 3.1 | <9.3 | <6.37 | n/a | ||
| 14 IRAS 04332+0209 | 1 | 04:35:48.4 +02:15:29.0 | 3590 | 2.7 | <8.1 | <0.93 | 1.9 | HII | |
| 15 MCG+02-21-013 | 2 | 08:04:46.4 +10:46:36.0 | 10323 | 4.1 | <12.3 | <12.93 | pair, Sy2+Sy1 | ||
| 16 NGC 2974 | 2 | 09:42:33.3 –03:41:57.0 | 1919 | 3.0 | <9.0 | <0.27 | Sy2, SF | ||
| 17 ESO 374-IG032a | 2 | 10:06:05.1 –33:53:17.0 | 10223 | 5.3 | <15.9 | <16.49 | 724.0 | LIRG, merger, pair | |
| 18 NGC 3341 | – | 10:42:31.5 +05:02:38.0 | 8196 | – | – | – | Sy2+LINER+comp | ||
| 19 UGC 05881 | 2 | 10:46:42.5 +25:55:54.0 | 6173 | 2.9 | <8.7 | <3.40 | 2.5 × 1024 | LINER | |
| 20 NGC 3563Ba | 2 | 11:11:25.2 +26:57:48.9 | 10774 | 3.0 | <9.0 | <10.35 | jet, FSRS | ||
| 21 NGC 3655a | 2 | 11:22:54.6 +16:35:24.1 | 1473 | 2.8 | <8.4 | <0.39 | HII | ||
| 22 ESO320-G030a | 2 | 11:53:11.7 –39:07:49.0 | 3232 | 6.9 | <20.7 | <2.41 | 33.0 | LIRG, SB, AGN | |
| 23 NGC 4261a,c | 2 | 12:19:23.2 +05:49:31.0 | 2238 | 3.1 | 10.3 | 50 | abs. | 1.6 × 1023 | LINER, twin jet |
| 24 NGC 4939a | 4 | 13:04:14.4 –10:20:23.0 | 3110 | 12.8 | <38.4 | <2.83 | >1.0 × 1025 | Sy2 | |
| 25 ESO 323-G077 | – | 13:06:26.1 –40:24:53.0 | 4501 | – | – | – | 5.5 × 1023 | Sy1.2/LINER | |
| 26 UGC 8327 | 2 | 13:15:15.6 +44:24:26.0 | 11002 | 2.7 | <8.1 | <9.55 | 5.2 × 1022 | Sy2+Sy2 | |
| 27 IC 4374a | 2 | 14:07:29.8 –27:01:04.3 | 6535 | 4.0 | <12.0 | <5.16 | >8.0 × 1021 | FSRS, FRII | |
| 28 NGC 5806 | 2 | 15:00:00.4 +01:53:29.0 | 1359 | 3.4 | <10.2 | <0.32 | Sy2 | ||
| 29 IRAS 15065-1107a | 2 | 15:08:49.1 –11:12:28.0 | 2105 | 3.6 | <10.8 | <0.53 | 1.1 | pair | |
| 30 IRAS 15179+3956 | 4 | 15:19:47.1 +39:45:38.0 | 14261 | 2.9 | <8.7 | <16.92 | 10.5 | 2core, HII | |
| 31 Ark 481a | 2 | 15:39:05.2 +05:34:16.6 | 7781 | 3.3 | <9.9 | <5.82 | n/a | ||
| 32 IRAS 16399-0937 | 2 | 16:42:40.2 –09:43:14.0 | 8098 | 3.9 | <11.7 | <7.25 | 47.0 | Sy2+HII/LINER | |
| 33 2MFGC13581 | 2+4 | 16:58:15.5 +39:23:29.0 | 10290 | 2.1 | 25.5 | 290 | Sy2 | ||
| 34 IRAS 17208-0014 | 2+4 | 17:23:21.9 –00:17:01.0 | 12834 | 2.5 | <7.5 | <11.54 | 1090.0 | 5.2 × 1021 | HII, LINER, SB |
| 35 IRAS 17526+3253 | 4 | 17:54:29.4 +32:53:14.0 | 7798 | 5.3 | 170 | 360 | 6.5 | ULIRG, LINER(?) | |
| 36 UGC 11185NED01 | 2 | 18:16:09.4 +42:39:23.0 | 12426 | 3.0 | <9.0 | <12.81 | Sy2+Sy2 | ||
| 37 IRAS 20550+1656 | 4 | 20:57:23.9 +17:07:39.0 | 10822 | 5.8(d) | 9.1 | 600 | 83.2 | >1.0 × 1024 | LIRG, HII, pair |
| 38 NGC 7130 | – | 21:48:19.5 –34:57:04.0 | 4842 | – | – | – | >6.0 × 1023 | Sy2/LINER/HII | |
| 39 UGC 12237 | 3 | 22:54:19.7 +11:46:57.0 | 8476 | 3.1 | <9.3 | <7.01 | 1.9 × 1023 | Sy2/SB, SNIa | |
| 40 NGC 7742 | 3 | 23:44:15.8 +10:46:01.0 | 1663 | 1.8 | <5.4 | <0.13 | Sy2/LINER, SB, HII | ||
Notes. Epochs refer to observing dates (see Table 1). The three sources without epochs were not observed. Optical heliocentric recession velocities (Vsys) are adopted from NED. The maser search covered Vsys ± 1250 km s-1. The flux scale is accurate to better than 15%. Sensitivity (1σ S22) is the rms over the line-free 75% of the 200 MHz band and is derived from 24.4 kHz channels without smoothing. The peak flux (S22) and total equivalent isotropic luminosity (L22) are stated for detections (sources in bold; 23, 33, 35, 37). For nondetections, 3σ upper limits on S22 and L22 are given, with L22 based on 3·1σ S22 and a 2.0 km s-1 FWHM Gaussian. Sources with hydroxyl (OH) masers are indicated in italics, and the OH maser luminosities (L1.6) are adopted from Staveley-Smith et al. (1992); Klöckner (2004); Impellizzeri (2008); Willett et al. (2011). The 2−10 keV X-ray absorbing column densities (NH) are adopted from literature (Risaliti et al. 1999; González-Martín et al. 2009; Noguchi et al. 2009; Tan et al. 2012; Vasudevan et al. 2013). The last column shows the object classification adopted from NED and literature. Remarks:
Source has a previous published or unpublished H2O nondetection (20 mJy to 200 mJy rms), with references on the WMCP or MCP project pages.
The velocity coverage on NGC 1275 was 3000 to 14 000 km s-1 (800 MHz), to include the infalling object at +3000 km s-1.
NGC 4261 exhibits H I in absorption at 1.4 GHz and OH in deep absorption at 6 GHz but has not been searched for OH at 1.6 GHz (van Langevelde et al. 2000; Impellizzeri 2008).
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