6.7 GHz methanol maser survey toward GLIMPSE point sources and BGPS 1.1 mm dust clumps

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Table 6

Detection rates of class II methanol masers in different subsamples.

	Detections	Total numbers	Detection rate


All with valid data^a	103	391	26%
Overlapped with C2012	60	194	31%
With associated class I methanol masers	36	54	67%
Within the boundary defined by C2012^b	78	172	45%
Within the boundary defined by C2012^c	49	95	52%
Within the slightly revised boundary^b	86	200	43%
Within the slightly revised boundary^c	52	110	47%

Notes.

^(a)

A sample of 404 sources from the BGPS 1.1 mm dust clump survey that met specific GLIMPSE point source color criteria was selected, 13 sources of which lacked valid data due to observing time constraints. This reduced our sample size to 391 sources. We observed a total of 318 targets, which resulted in the detection of twenty-nine 6.7 GHz methanol masers at above the 3σ limit. Combining an additional 74 detections directly from the literature (including the variable source detected at about 2σ by us), a total of 103 methanol masers are coincident with the 391 sources.

^(b)

The entire sample with valid data.

^(c)

The smaller subsample overlapped with C2012.

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