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GAY94 - 12.2-GHz methanol and 1.6-GHz hydroxyl masers associated with new 6.7-GHz methanol masers.

Short title: Gaylard et al. (1994)
Authors: Gaylard, M. J.MacLeod, G. C.van der Walt, D. J.
Journal: Monthly Notices of the Royal Astronomical Society, Vol. 269, 257-264 (1994)
Bibcode:

Non-detection table: Show non-detection table
Detection table: Show detection table (13 detection)
Target type: Known_Class_II
Transitions: OH_1665,OH_1667,CH3OH_12(II)

Abstract
18 new 12.2-GHz methanol masers and eight new 1.6-GHz hydroxyl masers have been detected towards 66 6.7-GHz methanol masers discovered in recent searches of infrared sources. The newly detected hydroxyl masers in IRAS 17589-2312 appear to have turned on in the last 15 years. The masers seen in both methanol transitions in IRAS 15122-5801 were observed to flare and decay on a time-scale of months. Key words: masers - ISM: molecules - radio lines: ISM.

Abstract

18 new 12.2-GHz methanol masers and eight new 1.6-GHz hydroxyl masers have been detected towards 66 6.7-GHz methanol masers discovered in recent searches of infrared sources. The newly detected hydroxyl masers in IRAS 17589-2312 appear to have turned on in the last 15 years. The masers seen in both methanol transitions in IRAS 15122-5801 were observed to flare and decay on a time-scale of months. Key words: masers - ISM: molecules - radio lines: ISM.

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Detection table from Gaylard et al. (1994)

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ID	Obs. RA	Obs. Dec	l	b	Group id	Source name	Image	Descr.	Frequency	V_range	V_peak	FWHM	F_peak	Telescope	RMS	Beam	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(deg.)	(deg.)					(MHz)	(km/s)	(km/s)	(km/s)	(Jy)		(Jy)	(arcsec)	Yes/No		(kpc)
1	10 48 4.5	-58 26 59.2	287.3711	0.6447	G287.371+0.644	10460-5811	Image		1665	-5;-3	-5	-3	0.9 (0.1)	HartRAO	0.100	30	+H₂O -CH₃OH I +CH₃OH II +OH	SFR		1993 Mar-Aug
2	14 20 8.5	-60 41 57.5	313.5771	0.3259	G313.577+0.325	14164-6028	Image		1665	-48;-45	-48	-45	1.0 (0.2)	HartRAO	0.100	30	+H₂O +CH₃OH II +OH	SFR		1993 Mar-Aug
3	14 24 59.9	-61 45 2.4	313.7634	-0.8624	G313.767-0.862	14212-6131	Image	Descr	1665	-54;-52	-54	-52	15.1 (0.3)	HartRAO	0.100	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1993 Mar-Aug
4	16 05 40.9	-49 11 29.7	332.2932	2.2814	G332.294+2.280	16019-4903	Image		1665	-26;-23	-26	-23	0.6 (0.1)	HartRAO	0.100	30	+H₂O +CH₃OH II +OH	SFR		1993 Mar-Aug
	16 05 40.9	-49 11 29.7	332.2932	2.2814	G332.294+2.280	16019-4903			1667	-31;-18	-31	-18	1.44 (0.2)	HartRAO	0.100	30	+H₂O +CH₃OH II +OH	SFR		1993 Mar-Aug
6	16 35 7.9	-48 46 16.5	336.0218	-0.8187	G336.018-0.826	16313-4840	Image		1665	-42;-40	-42	-40	1.44 (0.2)	HartRAO	0.100	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1993 Mar-Aug
	16 35 7.9	-48 46 16.5	336.0218	-0.8187	G336.018-0.826	16313-4840			1667	-43;-41	-43	-41	4.2 (0.3)	HartRAO	0.100	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1993 Mar-Aug
8	18 01 57.1	-23 12 37.1	6.7935	-0.2556	G6.794-0.256	17589-2312	Image		1665	13;17	13	17	3.84 (0.3)	HartRAO	0.100	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1993 Mar-Aug
9	18 34 19.8	-05 59 44.2	25.6469	1.0534	G25.649+1.050	18316-0602	Image		1665	39;42	39	42	8.84 (0.2)	HartRAO	0.100	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1993 Mar-Aug
	18 34 19.8	-05 59 44.2	25.6469	1.0534	G25.649+1.050	18316-0602			1667	40;41	40	41	4.14 (0.3)	HartRAO	0.100	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1993 Mar-Aug
11	18 36 11	-07 31 12.2	24.5053	-0.0569	G24.494-0.040	18334-0733	Image		1665	108;110	108	110	1.24 (0.2)	HartRAO	0.100	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1993 Mar-Aug
	18 36 11	-07 31 12.2	24.5053	-0.0569	G24.494-0.040	18334-0733		Descr	1667	108;117	108	117	1.1 (0.2)	HartRAO	0.100	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		1993 Mar-Aug
13	19 02 39.4	+06 59 2.5	40.4231	0.7000	G40.425+0.700	19002+0654	Image	Descr	1665	9;17	9	17	2.34 (0.1)	HartRAO	0.100	30	+H₂O +CH₃OH II +OH	SFR		1993 Mar-Aug

Distribution of sources in all sky (l,b)

Distribution of sources in all sky using Aladin

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Distribution of sources in IRAS color-color diagram

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Original color diagram is taken form van der Veen & Habing (1987)

Type	Description
I	Oxygen-rich non-variable stars without circumstellar shells
II	Variable stars with "young" O-rich circumstellar shells
IIIa	Variable stars with more evolved O-rich circumstellar shells
IIIb	Variable stars with thick O-rich circumstellar shells
IV	Variable stars with very thick O-rich circumstellar shells
V	Planetary nebulae and non- variable stars with very cool circumstellar shells
VIa	Variable stars with relatively cold dust at large distances; a significant part of the stars is carbon-rich
VIb	Variable stars with relatively hot dust close to the star and relatively cold dust at large distances; Some of the objects have proven to be O-rich
VII	Variable stars with more evolved C-rich circumstellar shells
VIII	Different sort of objects

Distribution of the detection velocities versus galactic longitude from GAY94

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