the Extensive Database of Astrophysical Maser Sources

Abstract
We present the first results from the MALT-45 (Millimetre Astronomer's Legacy Team-45 GHz) Galactic Plane survey. We have observed 5 square degrees (l = 330°-335°, b = ±0.5°) for spectral lines in the 7 mm band (42-44 and 48-49 GHz), including CS (1-0), class I CH₃OH masers in the 7(0,7)-6(1,6) A⁺ transition and SiO (1-0) v = 0, 1, 2, 3. MALT-45 is the first unbiased, large-scale, sensitive spectral line survey in this frequency range. In this paper, we present data from the survey as well as a few intriguing results rigorous analyses of these science cases are reserved for future publications. Across the survey region, we detected 77 class I CH₃OH masers, of which 58 are new detections, along with many sites of thermal and maser SiO emission and thermal CS. We found that 35 class I CH₃OH masers were associated with the published locations of class II CH₃OH, H₂O and OH masers but 42 have no known masers within 60 arcsec. We compared the MALT-45 CS with NH₃ (1,1) to reveal regions of CS depletion and high opacity, as well as evolved star-forming regions with a high ratio of CS to NH₃. All SiO masers are new detections, and appear to be associated with evolved stars from the Spitzer Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE). Generally, within SiO regions of multiple vibrational modes, the intensity decreases as v = 1, 2, 3, but there are a few exceptions where v = 2 is stronger than v = 1. eprintid: arXiv:1501.06650

ID	Obs. RA	Obs. Dec	l	b	Source name	Descr.	Line	V_peak	F_peak	Telescope	RMS	Beam
	(J2000)	(J2000)	(deg.)	(deg.)			CH₃OH (class I)	(km/s)	(Jy)		(Jy)	(arcsec)
1	16 07 37.8	-52 30 52.1	330.2953	-0.3919	G330.30-0.39		44 GHz (I)	-80.6	4.4	ATCA	4.900	64
2	16 09 31.2	-52 16 3.9	330.6746	-0.4043	G330.67-0.40		44 GHz (I)	-65.0	5.3	ATCA	5.600	64
3	16 07 12.8	-51 43 3.4	330.7831	0.2415	G330.78+0.24		44 GHz (I)	-43.4	3.7	ATCA	4.300	64
4	16 07 41.1	-51 43 48	330.8289	0.1832	G330.83+0.18		44 GHz (I)	-82.0	3.1	ATCA	3.800	64
5	16 10 16.6	-52 05 54.3	330.8747	-0.3584	G330.87-0.36		44 GHz (I)	-61.4	10	ATCA	15.000	64
6	16 10 22.3	-52 06 28.1	330.8790	-0.3752	G330.88-0.38		44 GHz (I)	-65.5	7.8	ATCA	10.000	64
7	16 10 44.3	-52 06 04	330.9248	-0.4086	G330.92-0.41		44 GHz (I)	-42.7	28	ATCA	33.000	64
8	16 10 6.9	-51 59 7.3	330.9331	-0.2585	G330.93-0.26		44 GHz (I)	-89.9	5.0	ATCA	5.900	64
9	16 09 53.1	-51 54 57.9	330.9541	-0.1836	G330.95-0.18	Descr	44 GHz (I)	-87.6	4.0	ATCA	4.700	64
10	16 12 0.3	-52 00 38.5	331.1290	-0.4751	G331.13-0.48		44 GHz (I)	-68.0	5.6	ATCA	7.500	64
11	16 12 5.9	-52 01 33.3	331.1290	-0.4961	G331.13-0.50		44 GHz (I)	-68.2	8.6	ATCA	11.000	64
12	16 11 0.7	-51 50 24.8	331.1332	-0.2460	G331.13-0.25		44 GHz (I)	-91.4	71	ATCA	88.000	64
13	16 09 15.5	-51 33 8.1	331.1290	0.1499	G331.13+0.15		44 GHz (I)	-75.7	68	ATCA	60.000	64
14	16 09 52.2	-51 32 18.6	331.2083	0.0956	G331.21+0.10		44 GHz (I)	-67.4	3.5	ATCA	3.300	64
15	16 11 31.3	-51 41 54.8	331.2875	-0.1961	G331.29-0.20		44 GHz (I)	-89.5	15	ATCA	20.000	64
16	16 12 27.4	-51 46 26.9	331.3416	-0.3502	G331.34-0.35		44 GHz (I)	-65.9	32	ATCA	37.000	64
17	16 11 6.4	-51 31 9.7	331.3624	-0.0210	G331.36-0.02		44 GHz (I)	-84.4	4.7	ATCA	5.800	64
18	16 12 48.9	-51 47 26.2	331.3707	-0.4001	G331.37-0.40		44 GHz (I)	-65.3	5.9	ATCA	7.300	64
19	16 11 39.5	-51 35 35.3	331.3749	-0.1335	G331.37-0.13		44 GHz (I)	-89.3	3.7	ATCA	4.500	64
20	16 10 28.7	-51 22 37.6	331.3874	0.1498	G331.39+0.15		44 GHz (I)	-45.9	6.5	ATCA	5.800	64
21	16 11 57.8	-51 35 40.6	331.4085	-0.1669	G331.41-0.17		44 GHz (I)	-85.2	4.9	ATCA	6.600	64
22	16 12 11.4	-51 35 24.1	331.4373	-0.1876	G331.44-0.19		44 GHz (I)	-88.2	14	ATCA	18.000	64
23	16 12 0.6	-51 27 44.3	331.5042	-0.0752	G331.50-0.08		44 GHz (I)	-89.3	38	ATCA	49.000	64
24	16 12 8.2	-51 29 01	331.5040	-0.1042	G331.50-0.10		44 GHz (I)	-87.1	11	ATCA	14.000	64
25	16 12 6.3	-51 27 35.5	331.5167	-0.0835	G331.52-0.08		44 GHz (I)	-90.4	20	ATCA	18.000	64
26	16 12 15.4	-51 27 17.1	331.5374	-0.0960	G331.54-0.10		44 GHz (I)	-92.3	77	ATCA	77.000	64
27	16 12 10.1	-51 25 39.9	331.5458	-0.0668	G331.55-0.07		44 GHz (I)	-89.1	4.9	ATCA	5.300	64
28	16 12 26.8	-51 27 20.4	331.5584	-0.1169	G331.56-0.12		44 GHz (I)	-101.0	14	ATCA	16.000	64
29	16 13 33.1	-51 24 28	331.7166	-0.2001	G331.72-0.20		44 GHz (I)	-47.0	4.1	ATCA	3.800	64
30	16 13 54	-51 15 32.1	331.8584	-0.1294	G331.86-0.13		44 GHz (I)	-50.2	5.6	ATCA	6.500	64
31	16 13 11.6	-51 06 19.8	331.8833	0.0582	G331.88+0.06		44 GHz (I)	-89.3	10	ATCA	13.000	64
32	16 13 58.2	-51 10 46.7	331.9209	-0.0794	G331.92-0.08		44 GHz (I)	-52.1	5.8	ATCA	6.400	64
33	16 16 13.7	-51 18 30.7	332.0874	-0.4168	G332.09-0.42		44 GHz (I)	-56.1	17	ATCA	21.000	64
34	16 15 18.1	-50 56 3.2	332.2417	-0.0460	G332.24-0.05		44 GHz (I)	-49.3	140	ATCA	180.000	64
35	16 15 43.9	-50 55 57.8	332.2916	-0.0918	G332.30-0.09		44 GHz (I)	-49.9	41	ATCA	37.000	64
36	16 14 42	-50 42 50.2	332.3251	0.1789	G332.32+0.18		44 GHz (I)	-48.5	9.3	ATCA	11.000	64
37	16 16 8.8	-50 53 55.2	332.3624	-0.1126	G332.36-0.11		44 GHz (I)	-50.6	9.8	ATCA	12.000	64
38	16 16 1.3	-50 33 12.6	332.5874	0.1499	G332.59+0.15		44 GHz (I)	-42.7	3.4	ATCA	4.000	64
39	16 17 28.1	-50 46 21.2	332.6001	-0.1669	G332.60-0.17		44 GHz (I)	-46.1	15	ATCA	18.000	64
40	16 17 27.9	-50 36 16.5	332.7167	-0.0460	G332.72-0.05		44 GHz (I)	-40.4	6.4	ATCA	7.300	64
41	16 20 27.1	-50 40 58.3	333.0000	-0.4335	G333.00-0.43		44 GHz (I)	-56.7	6.6	ATCA	9.800	64
42	16 18 55.5	-50 24 4.3	333.0249	-0.0626	G333.02-0.06		44 GHz (I)	-41.2	6.8	ATCA	7.900	64
43	16 18 44.6	-50 21 56	333.0292	-0.0169	G333.03-0.02		44 GHz (I)	-42.5	5.6	ATCA	7.000	64
44	16 20 48.4	-50 38 41.3	333.0667	-0.4460	G333.07-0.44		44 GHz (I)	-54.8	2.7	ATCA	3.200	64
45	16 20 37.3	-50 36 33.5	333.0709	-0.4002	G333.07-0.40		44 GHz (I)	-52.9	4.1	ATCA	4.600	64
46	16 21 15.1	-50 39 45.6	333.1041	-0.5084	G333.10-0.51		44 GHz (I)	-57.6	14	ATCA	8.100	64
47	16 21 04	-50 35 52	333.1291	-0.4418	G333.13-0.44		44 GHz (I)	-50.2	120	ATCA	150.000	64
48	16 21 1.8	-50 34 27.1	333.1416	-0.4209	G333.14-0.42	Descr	44 GHz (I)	-56.3	16	ATCA	18.000	64
49	16 19 43.4	-50 19 43	333.1666	-0.1001	G333.16-0.10		44 GHz (I)	-91.8	5.6	ATCA	7.700	64
50	16 19 45.7	-50 18 18.3	333.1875	-0.0876	G333.18-0.09		44 GHz (I)	-87.1	5.6	ATCA	7.100	64
51	16 21 18.6	-50 30 23.5	333.2209	-0.4044	G333.22-0.40		44 GHz (I)	-51.9	17	ATCA	19.000	64
52	16 19 50.3	-50 15 28.9	333.2292	-0.0627	G333.23-0.06		44 GHz (I)	-87.6	250	ATCA	310.000	64
53	16 19 29.5	-50 11 23.5	333.2376	0.0248	G333.24+0.02		44 GHz (I)	-69.3	3.9	ATCA	5.400	64
54	16 21 29.7	-50 26 30.3	333.2875	-0.3793	G333.29-0.38		44 GHz (I)	-52.3	5.4	ATCA	6.300	64
55	16 21 25.3	-50 25 5.4	333.2959	-0.3543	G333.30-0.35		44 GHz (I)	-50.8	3.5	ATCA	3.600	64
56	16 19 28.7	-50 04 50.9	333.3126	0.1040	G333.31+0.10		44 GHz (I)	-45.3	7.7	ATCA	13.000	64
57	16 21 36.4	-50 23 40.6	333.3334	-0.3585	G333.33-0.36		44 GHz (I)	-52.1	22	ATCA	22.000	64
58	16 21 4.4	-50 15 21.6	333.3709	-0.2002	G333.37-0.20		44 GHz (I)	-61.6	13	ATCA	16.000	64
59	16 20 10.6	-50 04 53.7	333.3918	0.0248	G333.39+0.02		44 GHz (I)	-70.6	4.1	ATCA	6.500	64
60	16 21 22.1	-50 09 42.5	333.4708	-0.1667	G333.47-0.16		44 GHz (I)	-43.4	21	ATCA	23.000	64
61	16 20 7.6	-49 55 10.1	333.5000	0.1457	G333.50+0.15		44 GHz (I)	-112.9	3.5	ATCA	5.900	64
62	16 22 1.9	-50 12 11.2	333.5167	-0.2710	G333.52-0.27		44 GHz (I)	-50.6	6.4	ATCA	8.700	64
63	16 22 19.6	-50 11 28.6	333.5585	-0.2961	G333.56-0.30		44 GHz (I)	-46.5	7.8	ATCA	11.000	64
64	16 21 09	-49 59 48.3	333.5625	-0.0251	G333.56-0.02		44 GHz (I)	-40.2	54	ATCA	63.000	64
65	16 20 55.9	-49 57 19.4	333.5667	0.0290	G333.57+0.03		44 GHz (I)	-85.0	6.2	ATCA	6.400	64
66	16 22 8.5	-50 06 31.7	333.5959	-0.2168	G333.59-0.21		44 GHz (I)	-49.7	26	ATCA	34.000	64
67	16 22 29.4	-50 01 23.8	333.6960	-0.1960	G333.70-0.20	Descr	44 GHz (I)	-51.0	4.4	ATCA	6.100	64
68	16 22 12.8	-49 57 20.1	333.7125	-0.1168	G333.71-0.12		44 GHz (I)	-31.9	6.6	ATCA	6.900	64
69	16 22 0.7	-49 50 26.5	333.7709	-0.0126	G333.77-0.01		44 GHz (I)	-89.5	16	ATCA	20.000	64
70	16 23 3.5	-50 00 51	333.7668	-0.2544	G333.77-0.25		44 GHz (I)	-49.5	6.4	ATCA	8.000	64
71	16 23 28.8	-50 00 39.2	333.8168	-0.3002	G333.82-0.30		44 GHz (I)	-48.5	19	ATCA	24.000	64
72	16 22 57.7	-49 48 39.2	333.9001	-0.1001	G333.90-0.10		44 GHz (I)	-64.4	3.4	ATCA	4.100	64
73	16 23 17.4	-49 48 38.4	333.9376	-0.1376	G333.94-0.14		44 GHz (I)	-42.3	4.6	ATCA	4.900	64
74	16 22 34.6	-49 37 52.8	333.9836	0.0706	G333.98+0.07		44 GHz (I)	-58.4	4.5	ATCA	5.700	64
75	16 23 15	-49 40 51.7	334.0251	-0.0417	G334.03-0.04		44 GHz (I)	-84.4	11	ATCA	14.000	64
76	16 23 50.4	-48 54 8.7	334.6464	0.4373	G334.64+0.44		44 GHz (I)	-66.5	5.7	ATCA	6.400	64
77	16 23 56.6	-48 47 3.7	334.7424	0.5082	G334.74+0.51		44 GHz (I)	-61.4	18	ATCA	6.700	64

IRAS source	IRAS coordinates (RA, Dec)	IRAS flux density (F12,F25,F60,F100)
2MASS source	2MASS coordinates (RA, Dec)	2MASS magnituted (J,H,K)

Variable star	Variable star parameters	Star Formation Region name	Star Formation Region parameters
WISE source	WISE coordinates (RA, Dec)	WISE magnitudes (w1, w2, w3, w4)
Akari IRC source	Akari IRC coordinates (RA, Dec)	Akari IRC fluxes (S09, S18)
Akari FIS source	Akari FIS coordinates (RA, Dec)	Akari FIS fluxes (S65, S90, S140, S160)

DSS (optical)	2MASS (JHK)	WISE (4-22 um)	IRAC (3-8 um)	GLIMPSE 360 (3.6-4.5 um)	PACS color (70-160 um)	SPIRE color (250-500 um)
AKARI color (60-160 um)	NVSS (1.4 GHz)	SDSS (optical+NIR)	Image size: arcsec (default is 120 arcsec)
			Image size: arcsec (default is 120 arcsec)

Display data from paper

JOR15 - MALT-45: a 7 mm survey of the southern Galaxy - I. Techniques and spectral line data

View paper statistics

Detection table from Jordan et al. (2015)