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PAL94 - IRAS-selected galactic star-forming regions - I. New 6_16 -- 5_23 water maser detections in molecular cores north of dec. +15.

Short title: Palumbo et al. (1994)
Authors: Palumbo, G. G. C.Scappini, F.Pareschi, G.Codella, C.Caselli, P.Attolini, M. R.
Journal: Monthly Notices of the Royal Astronomical Society, Vol. 266, 123-136 (1994)
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Target type: IRAS
Observations category: SF.general
Facility type: single-dish

Abstract
The results are presented of a survey, performed with the Medicina 32-m parabolic reflector, of a sample of IRAS-selected sources associated with molecular clouds for water masers at 22 GHz (6₁₆--5₂₃). The final aim is to study the occurrence of maser emission from star-forming regions in the very early stages of evolution. The whole sample consists of 1409 IRAS sources selected by applying Emerson's colour criteria. In the present paper, results are given for sources with declinations greater than +15�, belonging to two subsamples that satisfy more restrictive colour criteria which should identify ultracompact H II regions (subsample A, 288 sources) and H II regions (subsample B, 133 sources). The main result of the present study is that 59 IRAS sources in the samples are water maser emitters, 11 of which are new detections from the present survey.

Abstract

The results are presented of a survey, performed with the Medicina 32-m parabolic reflector, of a sample of IRAS-selected sources associated with molecular clouds for water masers at 22 GHz (6₁₆--5₂₃). The final aim is to study the occurrence of maser emission from star-forming regions in the very early stages of evolution. The whole sample consists of 1409 IRAS sources selected by applying Emerson's colour criteria. In the present paper, results are given for sources with declinations greater than +15�, belonging to two subsamples that satisfy more restrictive colour criteria which should identify ultracompact H II regions (subsample A, 288 sources) and H II regions (subsample B, 133 sources). The main result of the present study is that 59 IRAS sources in the samples are water maser emitters, 11 of which are new detections from the present survey.

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Detection table from Palumbo et al. (1994)

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ID	Obs. RA	Obs. Dec	l	b	Group id	grpv	Source name	Image	Line	V_peak	F_peak	∫F dv	Telescope	V_step	RMS	Beam	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(deg.)	(deg.)					H₂O	(km/s)	(Jy)	(Jy*km/s)		(km/s)	(Jy)	(arcsec)	Yes/No		(kpc)
1	00 26 6.4	+64 54 4.1	120.2483	2.1615	G120.248+2.161	G120.2483+2.1615	00232+6437	Image	22 GHz;	-44.1	17.1 (0.5)	31.8	MED	0.33	1.000	102	+H₂O	EVOLVED		01 02 92
2	19 30 58.5	+18 22 28.1	53.7151	-0.0716	G53.715-0.071	G53.7147-0.0709	19287+1816	Image	22 GHz;	24.4	10.6 (0.6)	19.3	MED	0.33	1.000	102	+H₂O -CH₃OH II	SFR		05 03 92
3	19 30 58.9	+18 52 16.1	54.1513	0.1659	G54.149+0.168	G54.1492+0.1675	19287+1845	Image	22 GHz;	25.5	2.7 (0.4)	3.5	MED	0.33	1.000	102	+H₂O -CH₃OH I	SFR		12 28 91
4	19 32 35.3	+16 57 33.5	52.6599	-1.0899	G52.663-1.092	G52.6626-1.0920	19303+1651	Image	22 GHz;	56.1	9.7 (0.9)	11.7	MED	0.33	1.000	102	+H₂O +CH₃OH II -OH			1010 92
5	19 49 32.6	+26 45 14	63.1156	0.3399	G63.115+0.340	G63.1153+0.3399	19474+2637	Image	22 GHz;	21.7	1461.1 (1.6)	1996.6	MED	0.33	1.000	102	+H₂O +CH₃OH I -CH₃OH II	SFR		04 18 92
6	20 12 57.7	+33 30 24.7	71.5211	-0.3850	G71.521-0.385	G71.5219-0.3852	20110+3321	Image	22 GHz;	16.3	179.5 (1.3)	263.7	MED	0.33	1.000	102	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		02 08 92
7	20 17 53.8	+39 20 46	76.9265	2.0382	G76.926+2.038	G76.9265+2.0382	20160+3911a	Image	22 GHz;	-5.4	29.7 (1.6)	30.1	MED	0.33	1.000	102	+H₂O	SFR		01 18 92
8	20 21 2.1	+37 33 19.3	75.7951	0.5201	G75.795+0.520	G75.7950+0.5200	20191+3723	Image	22 GHz;	-66.7	15.0 (0.5)	33.7	MED	0.33	1.000	102	+H₂O	UNK		04 27 92
9	21 02 32.4	+47 12 35.7	88.0993	0.4201	G88.099+0.420	G88.0993+0.4202	21008+4700	Image	22 GHz;	-49.2	44.3 (5.6)	48	MED	0.33	1.000	102	+H₂O -CH₃OH I -CH₃OH II	UNK		01 06 92
10	21 56 59.4	+59 22 38.3	102.3172	3.6785	G102.317+3.679	G102.3172+3.6785	21553+5908	Image	22 GHz;	-87.8	15.9 (0.6)	22.6	MED	0.33	1.000	102	+H₂O -CH₃OH II	SFR_MIXED		01 05 92
11	22 59 6.5	+59 28 27.8	109.0982	-0.3462	G109.098-0.346	G109.0982-0.3462	22570+5912	Image	22 GHz;	-53.6	4.3 (0.5)	5.6	MED	0.33	1.000	102	+H₂O -CH₃OH I -CH₃OH II	SFR_MIXED		01 05 92

Non-detection table from Palumbo et al. (1994)