Surviving the hole - I. Spatially resolved chemistry around Sagittarius A∗

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Table 1

Observational details of each frequency setup.

Date	Config.^a	τ ₂₂₅ ^b	Calibrators
	(# ant.)		Flux	Gain	Bandpass

2007 Jul. 10	C (8)	0.18	Uranus	Callisto	3c454.3
				J1924-292
2007 Jul. 15	C (8)	0.16	Uranus	Callisto	3c454.3
				J1924-292
2008 Sep. 03	SC (7)	0.25	Callisto	J1733-130	3c454.3
				J1924-292

Notes.

^(a)

Array configuration (SC: Subcompact – C: Compact) and number of antennae available.

^(b)

Average zenith opacity at 225 GHz during observations.

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