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CAS96B - A new survey for 6.6-GHz methanol masers

Short title: Caswell (1996B)
Authors: Caswell, J. L.
Journal: Monthly Notices of the Royal Astronomical Society, Volume 279, Issue 1, pp. 79-87.
Bibcode:
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Target type: Blind
Transitions: CH3OH_6(II)

Abstract
A new survey for 6.668-GHz methanol emission has yielded 57 masers. The survey covers a narrow strip along the Galactic plane, spanning the longitude range 330.Ëි to 339.Ëි, and was made with the Australia Telescope Compact Array. The position measurements have subarcsecond accuracy, a considerable improvement for the 36 masers which were known from previous studies 21 masers are new detections. The methanol maser emission arises from the dusty envelopes of newly formed massive stars. The high accuracy of the present methanol positions facilitates detailed comparisons with corresponding emission from other maser species (such as hydroxyl and water), with the HII region or stellar wind ionized by the star (sometimes detectable in the radio continuum), and with the associated dust (commonly detected as emission in the far infrared). A comparison has been made with preliminary results from a new hydroxyl 1665-MHz survey of the same region, which contains at least 31 OH masers. 25 of the sources are in common, i.e., the methanol and OH species of masers coincide to within 1 arcsec. The larger number of methanol masers is to be expected, since the surveys are sensitivity-limited and methanol masers are typically 16 times stronger than their OH counterparts. The ratio of methanol-to-OH peak intensity covers a wide range, with some maser sites strongly methanol-favoured and others strongly OH-favoured, but there is no evidence to suggest that a distinct population of exclusively methanol masers exists. Rather, the methanol-to-OH ratio is a measure of different physical conditions and may be a useful diagnostic for the evolutionary state of the HII region or the mass of its exciting star. There are indications that many methanol-favoured sites have only weak associated HII regions, an may thus be tracers of stars that are less massive or at an earlier stage of evolution.

Abstract

A new survey for 6.668-GHz methanol emission has yielded 57 masers. The survey covers a narrow strip along the Galactic plane, spanning the longitude range 330.Ëි to 339.Ëි, and was made with the Australia Telescope Compact Array. The position measurements have subarcsecond accuracy, a considerable improvement for the 36 masers which were known from previous studies 21 masers are new detections. The methanol maser emission arises from the dusty envelopes of newly formed massive stars. The high accuracy of the present methanol positions facilitates detailed comparisons with corresponding emission from other maser species (such as hydroxyl and water), with the HII region or stellar wind ionized by the star (sometimes detectable in the radio continuum), and with the associated dust (commonly detected as emission in the far infrared). A comparison has been made with preliminary results from a new hydroxyl 1665-MHz survey of the same region, which contains at least 31 OH masers. 25 of the sources are in common, i.e., the methanol and OH species of masers coincide to within 1 arcsec. The larger number of methanol masers is to be expected, since the surveys are sensitivity-limited and methanol masers are typically 16 times stronger than their OH counterparts. The ratio of methanol-to-OH peak intensity covers a wide range, with some maser sites strongly methanol-favoured and others strongly OH-favoured, but there is no evidence to suggest that a distinct population of exclusively methanol masers exists. Rather, the methanol-to-OH ratio is a measure of different physical conditions and may be a useful diagnostic for the evolutionary state of the HII region or the mass of its exciting star. There are indications that many methanol-favoured sites have only weak associated HII regions, an may thus be tracers of stars that are less massive or at an earlier stage of evolution.

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Detection table from Caswell (1996B)

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ID	Obs. RA	Obs. Dec	l	b	Group id	grpv	Source name	Image	Descr.	Line	V_peak	F_peak	Telescope	Beam	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(deg.)	(deg.)						CH₃OH (class II)	(km/s)	(Jy)		(arcsec)	Yes/No		(kpc)
1	16 10 23.1	-51 45 20.1	331.1196	-0.1180	G331.119-0.118	G331.1195-0.1180	331.120-0.118	Image		6.6 GHz (II);	-93.2	-88	ATCA	2	-CH₃OH I +CH₃OH II -OH			1994 May 15-16
2	16 11 26.6	-51 41 56.7	331.2782	-0.1882	G331.278-0.188	G331.2782-0.1881	331.278-0.188		Descr	6.6 GHz (II);	-78.2	-77	ATCA	2	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1994 May 15-16
3	16 12 12.5	-51 35 10.1	331.4420	-0.1867	G331.442-0.187	G331.4420-0.1867	331.442-0.187	Image	Descr	6.6 GHz (II);	-88.4	-84	ATCA	2	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1994 May 15-16
4	16 12 09	-51 25 47.6	331.5423	-0.0665	G331.542-0.066	G331.5424-0.0665	331.542-0.066	Image	Descr	6.6 GHz (II);	-85.9	-85	ATCA	2	-H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		1994 May 15-16
5	16 12 9.1	-51 25 45.3	331.5430	-0.0662	G331.542-0.066	G331.5424-0.0665	331.543-0.066	Image	Descr	6.6 GHz (II);	-84.1	-84	ATCA	2	-H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		1994 May 15-16
6	16 12 27.2	-51 27 38.2	331.5557	-0.1212	G331.556-0.121	G331.5557-0.1212	331.556-0.121		Descr	6.6 GHz (II);	-103.4	-96	ATCA	2	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1994 May 15-16
7	16 17 12.1	-50 47 12.3	332.5600	-0.1478	G332.560-0.148	G332.5600-0.1478	332.560-0.148	Image	Descr	6.6 GHz (II);	-55.6	-55	ATCA	2	-CH₃OH I +CH₃OH II -OH	SFR		1994 May 15-16
8	16 17 29.3	-50 46 12.5	332.6041	-0.1674	G332.604-0.167	G332.6040-0.1674	332.604-0.167	Image	Descr	6.6 GHz (II);	-50.9	-49	ATCA	2	+H₂O +CH₃OH I +CH₃OH II -OH	SFR_MIXED		1994 May 15-16
9	16 18 44.2	-50 21 50.6	333.0294	-0.0150	G333.029-0.015	G333.0294-0.0150	333.029-0.015	Image		6.6 GHz (II);	-55.2	-52	ATCA	2	+CH₃OH I +CH₃OH II -OH	SFR		1994 May 15-16
10	16 18 56.7	-50 23 54.1	333.0292	-0.0628	G333.029-0.063	G333.0292-0.0629	333.029-0.063	Image		6.6 GHz (II);	-40.4	-40	ATCA	2	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1994 May 15-16
11	16 19 42.7	-50 19 53.2	333.1632	-0.1007	G333.163-0.101	G333.1632-0.1007	333.163-0.101		Descr	6.6 GHz (II);	-95.3	-90	ATCA	2	+CH₃OH I +CH₃OH II -OH	SFR		1994 May 15-16
12	16 19 45.6	-50 18 35	333.1841	-0.0908	G333.184-0.091	G333.1841-0.0908	333.184-0.091		Descr	6.6 GHz (II);	-84.7	-81	ATCA	2	+CH₃OH I +CH₃OH II -OH	SFR		1994 May 15-16
13	16 19 51.2	-50 15 14.1	333.2339	-0.0616	G333.234-0.060	G333.2339-0.0602	333.234-0.062		Descr	6.6 GHz (II);	-91.9	-79	ATCA	2	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1994 May 15-16
14	16 19 29	-50 04 41.3	333.3150	0.1053	G333.315+0.105	G333.3150+0.1053	333.315+0.105	Image		6.6 GHz (II);	-45	-40	ATCA	2	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1994 May 15-16
15	16 21 20.2	-50 09 48.6	333.4660	-0.1643	G333.466-0.164	G333.4660-0.1643	333.466-0.164		Descr	6.6 GHz (II);	-42.5	-37	ATCA	2	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1994 May 15-16
16	16 21 8.8	-49 59 48	333.5621	-0.0246	G333.562-0.025	G333.5621-0.0246	333.562-0.025	Image		6.6 GHz (II);	-35.8	-33	ATCA	2	+CH₃OH I +CH₃OH II +OH	UNK		1994 May 15-16
17	16 21 9.1	-49 52 45.9	333.6455	0.0578	G333.645+0.058	G333.6455+0.0578	333.646+0.058	Image		6.6 GHz (II);	-87.3	-82	ATCA	2	+H₂O -CH₃OH I +CH₃OH II -OH	SFR_MIXED		1994 May 15-16
18	16 23 14.8	-49 48 48.9	333.9306	-0.1347	G333.931-0.135	G333.9306-0.1347	333.931-0.135	Image		6.6 GHz (II);	-36.7	-36	ATCA	2	+H₂O +CH₃OH I +CH₃OH II -OH	SFR		1994 May 15-16
19	16 25 45.7	-49 13 37.4	334.6351	-0.0148	G334.635-0.015	G334.6351-0.0148	334.635-0.015	Image		6.6 GHz (II);	-30	-27	ATCA	2	+H₂O -CH₃OH I +CH₃OH II -OH	SFR		1994 May 15-16
20	16 27 24.2	-49 04 11.3	334.9349	-0.0981	G334.935-0.098	G334.9349-0.0981	334.935-0.098	Image		6.6 GHz (II);	-19.5	-17	ATCA	2	+H₂O -CH₃OH I +CH₃OH II -OH	SFR		1994 May 15-16
21	16 30 57.3	-48 43 39.7	335.5851	-0.2846	G335.585-0.289	G335.5851-0.2847	335.585-0.285	Image	Descr	6.6 GHz (II);	-49.3	-43	ATCA	2	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		1994 May 15-16
22	16 30 58.7	-48 43 50.7	335.5854	-0.2894	G335.585-0.289	G335.5854-0.2897	335.585-0.289	Image	Descr	6.6 GHz (II);	-51.4	-50	ATCA	2	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		1994 May 15-16
23	16 30 58.8	-48 43 53.4	335.5851	-0.2902	G335.585-0.289	G335.5854-0.2897	335.585-0.290	Image	Descr	6.6 GHz (II);	-47.3	-45	ATCA	2	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		1994 May 15-16
24	16 30 7.2	-48 34 20.2	335.6035	-0.0777	G335.603-0.078	G335.6035-0.0777	335.603-0.078	Image		6.6 GHz (II);	-50.4	-50	ATCA	2	+CH₃OH II	UNK		1994 May 15-16
25	16 29 27.4	-48 17 53.2	335.7265	0.1910	G335.726+0.191	G335.7265+0.1910	335.726+0.191		Descr	6.6 GHz (II);	-44.3	-43	ATCA	2	+H₂O +CH₃OH II -OH	SFR_MIXED		1994 May 15-16
26	16 29 47.3	-48 15 51.7	335.7890	0.1741	G335.789+0.174	G335.7890+0.1741	335.789+0.174		Descr	6.6 GHz (II);	-47.5	-45	ATCA	2	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1994 May 15-16
27	16 33 29.2	-48 03 43.9	336.3582	-0.1374	G336.358-0.137	G336.3583-0.1374	336.358-0.137	Image	Descr	6.6 GHz (II);	-73.6	-72	ATCA	2	+H₂O +CH₃OH II +OH	SFR_MIXED		1994 May 15-16
28	16 34 38.3	-47 36 32.2	336.8224	0.0280	G336.822+0.028	G336.8223+0.0279	336.822+0.028		Descr	6.6 GHz (II);	-76.7	-76	ATCA	2	-H₂O +CH₃OH II +OH	SFR		1994 May 15-16
29	16 34 54.4	-47 35 37.3	336.8643	0.0049	G336.864+0.005	G336.8643+0.0050	336.864+0.005		Descr	6.6 GHz (II);	-76.1	-73	ATCA	2	+H₂O +CH₃OH II +OH	SFR_MIXED		1994 May 15-16
30	16 35 55.2	-47 38 45.4	336.9410	-0.1563	G336.941-0.156	G336.9410-0.1563	336.941-0.156	Image		6.6 GHz (II);	-67.3	-64	ATCA	2	-H₂O +CH₃OH II +OH	UNK		1994 May 15-16
31	16 36 12.4	-47 37 58.2	336.9832	-0.1832	G336.983-0.183	G336.9833-0.1830	336.983-0.183	Image		6.6 GHz (II);	-80.8	-78	ATCA	2	+H₂O +CH₃OH II +OH	SFR		1994 May 15-16
32	16 35 34	-47 31 11.7	336.9939	-0.0273	G336.994-0.027	G336.9938-0.0272	336.994-0.027		Descr	6.6 GHz (II);	-125.8	-118	ATCA	2	+H₂O +CH₃OH II +OH	SFR_MIXED		1994 May 15-16
33	16 36 18.8	-47 23 19.8	337.1759	-0.0323	G337.176-0.032	G337.1759-0.0323	337.176-0.032	Image	Descr	6.6 GHz (II);	-64.7	-64	ATCA	2	+H₂O +CH₃OH II -OH	SFR_MIXED		1994 May 15-16
34	16 36 56.3	-47 22 26.4	337.2579	-0.1007	G337.258-0.101	G337.2579-0.1008	337.258-0.101	Image	Descr	6.6 GHz (II);	-69.3	-67	ATCA	2	+H₂O +CH₃OH II +OH	SFR		1994 May 15-16
35	16 38 9.5	-47 04 59.9	337.6125	-0.0597	G337.613-0.060	G337.6125-0.0597	337.613-0.060		Descr	6.6 GHz (II);	-43	-38	ATCA	2	+H₂O +CH₃OH II +OH	SFR_MIXED		1994 May 15-16
36	16 38 19.1	-47 04 53.5	337.6320	-0.0788	G337.632-0.079	G337.6320-0.0788	337.632-0.079		Descr	6.6 GHz (II);	-56.9	-55	ATCA	2	+CH₃OH II -OH	SFR		1994 May 15-16
37	16 37 35.4	-46 53 47.6	337.6864	0.1373	G337.686+0.137	G337.6864+0.1373	337.686+0.137	Image		6.6 GHz (II);	-74.9	-74	ATCA	2	+H₂O +CH₃OH II -OH	SFR		1994 May 15-16
38	16 38 29.6	-47 00 35.5	337.7053	-0.0531	G337.705-0.053	G337.7053-0.0532	337.705-0.053		Descr	6.6 GHz (II);	-54.6	-43	ATCA	2	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1994 May 15-16
39	16 38 29.1	-47 00 43.3	337.7027	-0.0534	G337.705-0.053	G337.7053-0.0532	337.703-0.053		Descr	6.6 GHz (II);	-44	-43	ATCA	2	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1994 May 15-16
40	16 37 53.4	-46 54 40.8	337.7097	0.0894	G337.710+0.089	G337.7097+0.0894	337.710+0.089	Image		6.6 GHz (II);	-72.6	-72	ATCA	2	+H₂O +CH₃OH II -OH	SFR		1994 May 15-16
41	16 40 1.1	-46 53 34.5	337.9658	-0.1693	G337.966-0.169	G337.9658-0.1693	337.966-0.169	Image		6.6 GHz (II);	-60.4	-54	ATCA	2	+CH₃OH II -OH	SFR		1994 May 15-16
42	16 39 39.1	-46 41 28.1	338.0748	0.0118	G338.075+0.012	G338.0748+0.0118	338.075+0.012	Image	Descr	6.6 GHz (II);	-53	-43	ATCA	2	+H₂O +CH₃OH II +OH	SFR_MIXED		1994 May 15-16
43	16 39 39.8	-46 41 33.1	338.0752	0.0093	G338.075+0.012	G338.0748+0.0118	338.075+0.009	Image	Descr	6.6 GHz (II);	-38.2	-37	ATCA	2	+H₂O +CH₃OH II +OH	SFR_MIXED		1994 May 15-16
44	16 40 0.1	-46 27 37.1	338.2874	0.1201	G338.287+0.120	G338.2870+0.1201	338.287+0.120	Image		6.6 GHz (II);	-39.3	-38	ATCA	2	+H₂O +CH₃OH II +OH	SFR		1994 May 15-16
45	16 40 49.8	-46 23 37	338.4319	0.0576	G338.432+0.058	G338.4320+0.0575	338.432+0.058	Image	Descr	6.6 GHz (II);	-30.2	-27	ATCA	2	+H₂O +CH₃OH II -OH	SFR		1994 May 15-16
46	16 42 15.5	-46 34 18.4	338.4605	-0.2447	G338.461-0.245	G338.4605-0.2449	338.461-0.245		Descr	6.6 GHz (II);	-50.4	-49	ATCA	2	+H₂O +CH₃OH II +OH	SFR		1994 May 15-16
47	16 41 07	-46 15 28.3	338.5665	0.1102	G338.566+0.110	G338.5665+0.1103	338.566+0.110	Image		6.6 GHz (II);	-75	-73	ATCA	2	+H₂O +CH₃OH II +OH	SFR		1994 May 15-16
48	16 43 8.2	-46 09 12.8	338.8753	-0.0839	G338.875-0.084	G338.8752-0.0839	338.875-0.084		Descr	6.6 GHz (II);	-41.4	-39	ATCA	2	-H₂O +CH₃OH II +OH	SFR		1994 May 15-16
49	16 43 16	-46 05 40.2	338.9346	-0.0620	G338.934-0.062	G338.9345-0.0620	338.935-0.062		Descr	6.6 GHz (II);	-41.9	-41	ATCA	2	+H₂O -CH₃OH I +CH₃OH II +OH	SFR_MIXED		1994 May 15-16
50	16 44 49	-46 10 13	339.0530	-0.3146	G339.053-0.315	G339.0530-0.3146	339.053-0.315	Image	Descr	6.6 GHz (II);	-111.6	-111	ATCA	2	-H₂O +CH₃OH II +OH	SFR		1994 May 15-16
51	16 42 49.6	-45 51 23.8	339.0636	0.1520	G339.064+0.152	G339.0636+0.1520	339.064+0.152	Image		6.6 GHz (II);	-85.6	-83	ATCA	2	+H₂O +CH₃OH II -OH	SFR		1994 May 15-16
52	16 43 43.1	-45 42 08	339.2822	0.1359	G339.282+0.136	G339.2822+0.1359	339.282+0.136	Image	Descr	6.6 GHz (II);	-69.1	-68	ATCA	2	-H₂O +CH₃OH II +OH	SFR		1994 May 15-16
53	16 43 44.9	-45 41 28	339.2941	0.1392	G339.282+0.136	G339.2941+0.1392	339.294+0.139	Image	Descr	6.6 GHz (II);	-74.6	-65	ATCA	2	-H₂O +CH₃OH II +OH	SFR		1994 May 15-16
54	16 44 51	-45 36 56.1	339.4770	0.0431	G339.477+0.043	G339.4770+0.0431	339.477+0.043	Image		6.6 GHz (II);	-9.3	-5	ATCA	2	+CH₃OH II -OH	UNK		1994 May 15-16
55	16 45 58.8	-45 38 47.2	339.5824	-0.1270	G339.584-0.127	G339.5837-0.1270	339.582-0.127	Image	Descr	6.6 GHz (II);	-31.3	-29	ATCA	2	+H₂O +CH₃OH I +CH₃OH II -OH	SFR_MIXED		1994 May 15-16
56	16 46 06	-45 36 43.3	339.6221	-0.1205	G339.622-0.121	G339.6220-0.1206	339.622-0.121	Image	Descr	6.6 GHz (II);	-32.8	-30	ATCA	2	+H₂O -CH₃OH I +CH₃OH II +OH	SFR		1994 May 15-16
57	16 45 51.6	-45 23 32.6	339.7616	0.0543	G339.762+0.054	G339.7616+0.0542	339.762+0.054	Image		6.6 GHz (II);	-51	-49	ATCA	2	+H₂O +CH₃OH II -OH	SFR		1994 May 15-16

DSS colored	2MASS colored	WISE colored
PACS color (70-160 um)	SPIRE color (250-500 um)	GLIMPSE 360
SDSS color	IRAC color I1,I2,I4	NVSS (1.4GHz)
ATLASGAL 870 um	ATLASGAL 870 um + Planck	Bolocam 1.1 mm

select MAX(met2_data_all.ra_hms) as ra_hms,MAX(met2_data_all.dec_dms) as dec_dms,MAX(met2_data_all.source_name) as source_name,MAX(met2_data_all.ra) as ra,MAX(met2_data_all.dec) as dec,MAX(met2_data_all.l) as l,MAX(met2_data_all.b) as b,MAX(met2_data_all.grp) as grp,MAX(met2_data_all.grpv) as grpv,MAX(met2_data_all.other_name) as other_name,MAX(met2_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(met2_data_all.line) as line,MAX(met2_data_all.vrange) as vrange,MAX(met2_data_all.vpeak) as vpeak,MAX(met2_data_all.peak) as peak,MAX(met2_data_all.fwhm) as fwhm,MAX(met2_data_all.int) as int,MAX(met2_data_all.rms) as rms,MAX(met2_data_all.units) as units,MAX(met2_data_all.units_rms) as units_rms,MAX(met2_data_all.date_txt) as date_txt,MAX(met2_data_all.telescope_ref) as telescope_ref,MAX(met2_data_all.telescope_conf) as telescope_conf,MAX(met2_data_all.v_step) as v_step,MAX(met2_data_all.beam) as beam,MAX(met2_data_all.beam_maj) as beam_maj,MAX(met2_data_all.beam_min) as beam_min,MAX(met2_data_all.beam_pa) as beam_pa,MAX(met2_data_all.ref) as ref,MAX(met2_data_all.list_ref) as list_ref,MAX(met2_data_all.ascii) as ascii,MAX(met2_data_all.url) as url,MAX(met2_data_all.image) as image,MAX(met2_data_all.image2) as image2,MAX(met2_data_all.image3) as image3,MAX(met2_data_all.descr) as descr,MAX(met2_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(met2_data_all.dist) as dist,1 as dist_parallax,MAX(met2_data_all.date_txt) as date_txt,MAX(line_det) as line_det,MAX(type) as type,MAX(simbad_types_cat) as simbad_types_cat FROM met2_data_all  LEFT JOIN all_objects_withmet ON met2_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON met2_data_all.line=transitions."Line"  WHERE ref ilike 'CAS96B' AND detected=true AND hide=false GROUP BY ref

select met2_data_all.ra_hms,met2_data_all.dec_dms,met2_data_all.source_name,met2_data_all.ra,met2_data_all.dec,met2_data_all.l,met2_data_all.b,met2_data_all.grp,met2_data_all.grpv,met2_data_all.other_name,met2_data_all.other_desc,met2_data_all.thermal,met2_data_all.line,met2_data_all.vrange,met2_data_all.vpeak,met2_data_all.peak,met2_data_all.fwhm,met2_data_all.int,met2_data_all.rms,met2_data_all.units,met2_data_all.units_rms,met2_data_all.date_txt,met2_data_all.telescope_ref,met2_data_all.telescope_conf,met2_data_all.v_step,met2_data_all.beam,met2_data_all.beam_maj,met2_data_all.beam_min,met2_data_all.beam_pa,met2_data_all.ref,met2_data_all.list_ref,met2_data_all.ascii,met2_data_all.url,met2_data_all.image,met2_data_all.image2,met2_data_all.image3,met2_data_all.descr,met2_data_all.id,met2_data_all.mjy_flag,met2_data_all.rms_mjy_flag,met2_data_all.dist,met2_data_all.dist_parallax,met2_data_all.date_txt,line_det,type,simbad_types_cat FROM met2_data_all   LEFT JOIN all_objects_withmet ON met2_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON met2_data_all.line=transitions."Line"  WHERE ref ilike 'CAS96B' AND detected=true AND hide=false ORDER BY detected DESC,id

Display data from paper

CAS96B - A new survey for 6.6-GHz methanol masers

View as list of objects

Detection table from Caswell (1996B)