Table 4: Statistics on the overlap of maser species, radio continuum emission and IRAS emission. The third column gives the percentage of sources with masers in two or three of the maser species (OH, H₂O, and CH₃OH) with respect to the total number of sources studied (79). The fifth and seventh columns are the percentages of radio and IRAS counterparts, respectively, with respect to the number of maser sources given in the second column.
Overlap $N_{\rm maser}$ % $N_{\rm radio}$ % $N_{\rm IRAS}$ %

OH/CH₃OH/H₂O 9 11 4 44 5 56

OH/CH₃OH 12 15 4 33 4 33

CH₃OH/H₂O 26 33 10 38 14 54

CH₃OH 32 41 6 19 18 56

**Table 4:** Statistics on the overlap of maser species, radio continuum emission and IRAS emission. The third column gives the percentage of sources with masers in two or three of the maser species (OH, H₂O, and CH₃OH) with respect to the total number of sources studied (79). The fifth and seventh columns are the percentages of radio and IRAS counterparts, respectively, with respect to the number of maser sources given in the second column.
Overlap	$N_{\rm maser}$	%	$N_{\rm radio}$	%	$N_{\rm IRAS}$	%
OH/CH₃OH/H₂O	9	11	4	44	5	56
OH/CH₃OH	12	15	4	33	4	33
CH₃OH/H₂O	26	33	10	38	14	54
CH₃OH	32	41	6	19	18	56

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations and results
	3 Discussion
	4 Conclusions
	References