Table 2: Coordinates of observed sources.
Source RA (J2000) Dec (J2000)

Sgr B2 $17^{{\rm h}}47^{{\rm m}}21.75^{{\rm s}}$ $-28\hbox{$^\circ$ }23\hbox{$^\prime$ }14.1\hbox{$^{\prime\prime}$ }$

W49 N $19^{{\rm h}}10^{{\rm m}}13.55^{{\rm s}}$ $+09\hbox{$^\circ$ }06\hbox{$^\prime$ }14.7\hbox{$^{\prime\prime}$ }$

Sgr A $^{\ast }$ $17^{{\rm h}}45^{{\rm m}}39.97^{{\rm s}}$ $-29\hbox{$^\circ$ }00\hbox{$^\prime$ }23.6\hbox{$^{\prime\prime}$ }$

NGC 7023 $21^{{\rm h}}01^{{\rm m}}36.91^{{\rm s}}$ $+68\hbox{$^\circ$ }09\hbox{$^\prime$ }48.2\hbox{$^{\prime\prime}$ }$

**Table 2:** Coordinates of observed sources.
Source	RA (J2000)	Dec (J2000)
Sgr B2	$17^{{\rm h}}47^{{\rm m}}21.75^{{\rm s}}$	$-28\hbox{$^\circ$ }23\hbox{$^\prime$ }14.1\hbox{$^{\prime\prime}$ }$
W49 N	$19^{{\rm h}}10^{{\rm m}}13.55^{{\rm s}}$	$+09\hbox{$^\circ$ }06\hbox{$^\prime$ }14.7\hbox{$^{\prime\prime}$ }$
Sgr A $^{\ast }$	$17^{{\rm h}}45^{{\rm m}}39.97^{{\rm s}}$	$-29\hbox{$^\circ$ }00\hbox{$^\prime$ }23.6\hbox{$^{\prime\prime}$ }$
NGC 7023	$21^{{\rm h}}01^{{\rm m}}36.91^{{\rm s}}$	$+68\hbox{$^\circ$ }09\hbox{$^\prime$ }48.2\hbox{$^{\prime\prime}$ }$

Source LaTeX | All tables | In the text

	1 Introduction
	2 CH₂ rotational spectrum
	3 Observations and data reduction
	4 Sgr B2 results
	5 Abundances
	6 CH₂ in other sources
	7 Discussion
	8 Summary
	Appendix A: Observations used
	References