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Table A.1

Infrared transients, SPIRITS, considered in this work.

RA DEC SPIRITS Host galaxy CXO exposure time comments
[ks]
1 01:35:01.12 −41:26:07.2 17eq NGC0625 60
2 13:25:17.57 −42:59:21.0 17bf Cen A 1100
3 03:46:35.25 +68:01:57.1 17c IC 342 70
4 03:18:21.22 −66:29:51.1 16tj NGC 1313 70 optical/UV src at 0.′′2 XMM-Newton OM & HST, cluster [L2004] n1313-464
5 03:18:27.20 −66:28:38.6 16th NGC 1313 85
6 03:18:16.92 −66:28:57.7 16tg NGC 1313 85 UV src at 0.′′5 in the HST image
7 03:18:04.82 −66:30:17.8 16tf NGC 1313 85 UV src at 0.′′5 in the HST image
8 13:05:43.63 −49:27:04.2 16rz NGC 4945 450
9 13:05:07.36 −49:32:40.0 16rs NGC 4945 126
10 13:05:22.33 −49:28:31.2 16rp NGC 4945 450
11 13:05:19.00 −49:28:50.8 16rn NGC 4945 450
12 13:36:47.15 −29:52:58.6 16pr M 83 840
13 13:37:01.50 −29:54:26.8 16po M 83 840
14 03:46:27.63 +68:13:42.0 16ph IC 342 70
15 13:36:40.73 −29:52:41.7 16oz M 83 840
16 13:18:53.54 −21:04:14.5 16oj NGC 5068 54
17 14:02:57.80 +54:22:50.6 16kp M 101 800
18 12:50:50.53 +41:06:04.4 16ko M 94 74
19 12:40:06.02 −11:38:14.1 17as M 104 92 1.′′8 away from the globular cluster [LFB2001] C-101
20 13:05:36.89 −49:23:38.2 17ar NGC 4945 90
21 03:47:29.89 +68:03:13.1 17g IC 342 14
22 00:40:20.95 +41:39:35.6 16abq M 110 9
23 03:46:49.27 +68:03:52.9 17lk IC 342 72
24 03:46:03.55 +68:08:48.2 17lg IC 342 72
25 03:46:07.32 +68:07:59.0 17lc IC 342 72
26 06:16:27.78 −21:22:51.7 17lb IC 2163 62
27 13:25:33.08 −43:00:51.6 17kw Cen A 1100
28 13:25:32.03 −43:00:41.3 17kq Cen A 1100
29 13:25:20.3 −42:59:20.2 17kp Cen A 1100
30 13:36:57.42 −29:50:19.1 17kj M83 810
31 13:25:22.18 −43:01:17.5 17kf Cen A 1100
32 13:25:29.44 −43:01:40.0 17kc Cen A 1100
33 13:37:16.22 −29:54:18.7 17ka M83 810
34 12:18:50.33 +47:18:11.5 17fo NGC4258 500
35 14:03:01.29 +54:22:54.4 17fm M101 885
36 23:57:44.77 −32:34:58.4 17fe NGC 7793 190
37 09:55:18.54 +69:04:22.8 15aht M81 800 0.′′5 offset from a nova candidate 2015 Oct. 14.198 UT
38 07:36:37.40 +65:38:02.6 15ahg NGC 2403 80
39 03:46:17.57 +68:08:44.7 15agl IC342 30
40 20:34:59.65 +60:11:18.1 15afp NGC6946 163
41 02:22:40.29 +42:23:53.5 15aev NGC 891 110
42 00:40:22.82 +41:41:36.4 15ael NGC 205 9 optical source 0.′′6 V = 20.6 mag
43 15:22:05.55 +05:03:15.9 15ade NGC 5921 not observed
44 03:18:23.63 − 66:30:24.2 15aag NGC1313 65
45 13:36:57.08 − 29:53:13.3 15aac M83 810
46 13:34:44.21 − 45:32:25.5 15yq ESO270G017 not observed
47 00:54:48.74 − 37:43:13.7 15yf NGC300 200
48 12:34:19.00 +06:28:15.7 15ue NGC 4532 not observed
49 12:22:55.29 +15:49:22.0 15ud NGC 4321 134 H II region
50 11:18:19.10 − 32:51:06.9 15ua NGC 3621 not observed
51 01:35:06.72 − 41:26:13.4 14bsb NGC 625 60 H II region
52 00:54:49.68 − 37:39:51.2 14bmc NGC300 150
53 22:02:41.52 − 51:17:34.5 14beq IC5152 not observed no optical counterpart in post-outburst images
54 12:56:43.25 +21:42:25.7 14bay NGC 4826 27
55 12:29:03.16 +13:11:30.7 16ix NGC 4458 34
56 12:56:39.10 +21:41:43.2 16fz NGC 4826 27
57 12:15:38.61 +36:19:46.9 16ea NGC 4214 56
58 12:30:27.78 +41:39:41.3 16az NGC 4485/4490 78 optical 0.′′6, X-ray at 1.′′4, HMXB?
59 09:32:11.64 +21:30:03.0 16aj NGC 2903 93
60 03:18:09.34 − 66:29:59.4 15qv NGC1313 90
61 03:18:15.26 − 66:30:03.4 15qo NGC1313 85
62 22:02:42.07 − 51:17:22.3 15qh IC 5152 not observed
63 10:44:02.36 +11:42:15.1 15pz NGC 3351 128
64 13:37:08.37 − 29:50:19.7 15nz M83 840
65 12:39:54.87 +61:36:46.3 15mr NGC 4605 not observed
66 14:03:10.76 +54:22:49.1 15mo M101 850
67 14:03:49.44 +54:20:50.7 15mn M101 680
68 10:03:18.90 +68:43:52.1 15mk NGC 3077 60
69 09:55:28.72 +69:39:58.6 14qk M82 813
70 12:50:49.56 +41:05:52.7 14afv NGC4736 71
71 13:05:30.87 − 49:26:50.8 14agd NGC 4945 449
72 13:36:52.95 − 29:52:16.1 14ajc M83 840 X-ray source at 0.′′5, SNR?
73 13:37:05.02 − 29:48:56.2 14ajd M83 840
74 14:02:55.51 +54:23:18.5 14aje M101 885
75 13:37:12.71 − 29:49:14.9 14ajp M83 508
76 13:36:54.81 − 29:52:33.7 14ajr M83 840
77 03:47:03.17 +68:09:05.3 14ave IC342 15
78 09:56:01.52 +69:03:12.5 14axa M81 790 associated with nova PNV J09560160+6903126
79 07:36:34.70 +65:39:22.4 14axb NGC2403 38
80 13:39:50.99 − 31:38:46.0 14bay NGC5253 191
81 12:56:47.90 +21:41:13.4 17pe M64 28
82 13:18:51.52 − 21:01:35.1 17nx NGC 5068 54
83 09:55:36.20 +69:06:21.0 17mj M81 300 possible X-ray source at 1.′′4
84 07:36:35.94 +65:37:26.5 17mi NGC 2403 230
85 13:05:11.16 − 49:30:19.0 17mb NGC 4945 300

Notes. Chandra exposure times shown in col. 6 are approximate and can be used only for a rough guidance.

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