A puzzling non-detection of [O III] and [C II] from a z ≈ 7.7 galaxy observed with ALMA

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Table 1.

Summary of ALMA observations.

Date	Baseline lengths	N_ant	SPW central frequency	Integration time	Median PWV
YYYY-MM-DD	(m)		(GHz)	(mm:ss)	(mm)
Band 6
2018-04-19	15–500	42	219.35, 221.09, 233.98, 235.98	38:32	1.8
2018-04-19	15–500	44	219.35, 221.09, 233.98, 235.98	38:30	1.8
2018-09-01	15–784	47	219.37, 221.11, 234.00, 236.00	38:33	1.3
2016-03-22 ^(a)	15-460	40	219.00, 220.75 , 233.94, 235.82	20:47	2.8
2016-05-15 ^(a)	17-640	38	219.01, 220.77, 233.96, 235.83	20:47	1.6

Band 8
2018-08-25	15–500	43	391.64, 393.31, 403.71, 405.51	48:07	0.3
2018-09-11	15–1200	48	391.63, 393.31, 403.70, 405.50	48:08	0.7
2018-09-11	15–1200	45	391.63, 393.31, 403.70, 405.50	48:07	0.7
2018-09-23	15–1400	45	391.63, 393.30, 403.70, 405.50	48:09	0.6

Notes. The table shows the date of observation, baseline lengths, number of antennae (N_ant), central frequency of the SPW, integration time, and median precipitable water vapor (PWV) for the band 6 and band 8 observations.

^(a)

Cycle 3 observations; 2015.1.00821.S, PI: S. Finkelstein.

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