HET Night Report Reader

Civil Date	Ephemerides
2026-05-16	Sunset			Sunrise			Moon
	Set	12°	18°	18°	12°	Rise	Rise	Set
	01:52	02:43	03:16	10:27	11:01	11:53	-	02:01
Night Length	7:11		Sunset Temperature

On-Duty Personnel
Resident Astronomer	Telescope Operator	OPS Engineer	Day Ops
Tyler Ryburn	Aiden Dillard Amy Westfall	-	-

Overlaps		none

Other Personnel	Chris Robison, Sergey Rostopchin, Herman Kriel, George Damm

Guests	none

Open/Close Log
Open time	Outdoor temp	Truss temp	Close time	Reason	Time open
02:20	23.4	24.0	10:33	twilight	08:13
Total Time Open					8:13

Program	Night Priority	Science
03:16	Science
06:20	Idle due to weather (poor image quality)
07:13	Science
09:21	Idle due to weather (clouds, wind)

Stack Data
Start	Stop	ee50	ee80	Hefi Focus	Mars Focus	Outside Temp	Dome Temp	Truss Temp	Wind Direction	Wind Speed	Stack Type
03:23	04:13	0.43	0.67	-380	+169	23.1	23.5	23.5	194	8	First of Night
↪ Comments			Poor dome seeing extended stacking process and ongoing PR. Offset pistons on segments 24 and 46 by 20. Segments appeared oblate.
06:50	07:13	0.05	0.07	-340	+1005	20.0	21.0	21.2	213	12	Stack/Re-stack
10:28	10:33	0.69	1.08	-460	+1231	18.8	19.4	19.6	302	21	Post-Observing

Problem Reports
PR Number	Times	Time Lost	Description	Response
6676	01:45-06:06	04:21	Multiple camra_hardware issues arose.	VIRUS and LRS2 restarted.

Ops Comments	none

TO Comments	Science delayed at the beginning of the night due to PR issues. Once on sky, science was affected by poor seeing and clouds throughout the night.

RA Comments	none

Observations
File	Target/QID	Exp Start	Exposure	Overhead	Program	Instrument Configuration	Data Type	IQ	Dimm	SkySBrt	Skytrans	SNR	Comments	Charge
lrs20009900_01	bias	00:02	0			LRS2	cal							Yes
virus0009900_01	flat_Qth	00:03	20			VIRUS	cal							Yes
virus0009901_01	bias	00:04	0			VIRUS	cal							Yes
lrs20009901_01	flat_ldls_long_B	00:05	20			LRS2	cal							Yes
virus0009902_01	dark	00:06	15			VIRUS	cal							Yes
lrs20009902_01	Cd-A_B	00:07	29			LRS2	cal							Yes
lrs20009903_01	FeAr_R	00:09	15			LRS2	cal							Yes
lrs20009904_01	Hg_B	00:10	15			LRS2	cal							Yes
lrs20000001_01	bias	00:16	0			LRS2	cal							Yes
virus0000001_01	bias	00:16	0			VIRUS	cal							Yes
lrs20000001_02	bias	00:16	0			LRS2	cal							Yes
virus0000001_02	bias	00:17	0			VIRUS	cal							Yes
lrs20000001_03	bias	00:17	0			LRS2	cal							Yes
virus0000001_03	bias	00:17	0			VIRUS	cal							Yes
lrs20000001_04	bias	00:18	0			LRS2	cal							Yes
virus0000001_04	bias	00:18	0			VIRUS	cal							Yes
lrs20000001_05	bias	00:19	0			LRS2	cal							Yes
virus0000001_05	bias	00:19	0			VIRUS	cal							Yes
lrs20000001_06	bias	00:20	0			LRS2	cal							Yes
virus0000001_06	bias	00:20	0			VIRUS	cal							Yes
lrs20000001_07	bias	00:21	0			LRS2	cal							Yes
virus0000001_07	bias	00:21	0			VIRUS	cal							Yes
lrs20000001_08	bias	00:22	0			LRS2	cal							Yes
virus0000001_08	bias	00:22	0			VIRUS	cal							Yes
lrs20000001_09	bias	00:22	0			LRS2	cal							Yes
virus0000001_09	bias	00:23	0			VIRUS	cal							Yes
lrs20000001_10	bias	00:23	0			LRS2	cal							Yes
virus0000001_10	bias	00:24	0			VIRUS	cal							Yes
lrs20000001_11	bias	00:24	0			LRS2	cal							Yes
virus0000001_11	bias	00:25	0			VIRUS	cal							Yes
lrs20000002_01	dark	00:28	360			LRS2	cal							Yes
virus0000002_01	dark	00:28	360			VIRUS	cal							Yes
lrs20000003_01	dark	00:35	360			LRS2	cal							Yes
virus0000003_01	dark	00:35	360			VIRUS	cal							Yes
lrs20000004_01	dark	00:42	360			LRS2	cal							Yes
virus0000004_01	dark	00:42	360			VIRUS	cal							Yes
virus0000005_01	dark	02:14	10			VIRUS	cal							Yes
virus0000005_02	dark	02:15	10			VIRUS	cal							Yes
virus0000005_03	dark	02:16	10			VIRUS	cal							Yes
virus0000005_04	dark	02:17	10			VIRUS	cal							Yes
virus0000005_05	dark	02:18	10			VIRUS	cal							Yes
virus0000006_01	dark	03:04	10			VIRUS	cal							Yes
virus0000007_01	bias	03:06	0			VIRUS	cal							Yes
0001	Dark	03:24	319.5			HPF	cal							Yes
0002	Quartz FCU	03:31	74.5			HPF	cal							Yes
0003	Quartz FCU	03:33	74.5			HPF	cal							Yes
0004	Quartz FCU	03:34	74.5			HPF	cal							Yes
0005	Quartz FCU	03:36	74.5			HPF	cal							Yes
0006	Quartz FCU	03:38	74.5			HPF	cal							Yes
0007	Alpha Bright Cal	03:40	85.2			HPF	cal							Yes
0008	Alpha Bright Cal	03:42	85.2			HPF	cal							Yes
0009	Alpha Bright Cal	03:44	85.2			HPF	cal							Yes
0010	Alpha Bright Cal	03:46	85.2			HPF	cal							Yes
virus0000008_01	dark	05:07	10			VIRUS	cal							Yes
virus0000009_01	bias	05:08	0			VIRUS	cal							Yes
lrs20000005_01	dark	05:42	10			LRS2	cal							Yes
lrs20000006_01	bias	05:43	0			LRS2	cal							Yes
0011	QID 79	06:19	42.6	13.3	UT26-2-019	HPF	sci	1.73	0.97	21.12	0.76	540		P4
0012	LFC Cal	06:22	106.5			HPF	cal							Yes
0013	LFC Cal	06:27	106.5			HPF	cal							Yes
virus0000010_01	parallel	06:27	1800			VIRUS	sci							Yes
lrs20000007_01	QID 908	06:27	1800	-17.0	M26-2-005	LRS2-R	sci	1.99	0.91	21.17	0.90		image quality degraded significantly; aborted	No
0014	LFC Cal	06:29	106.5			HPF	cal							Yes
0015	LFC Cal	06:32	106.5			HPF	cal							Yes
0016	LFC Cal	07:15	106.5			HPF	cal							Yes
virus0000011_01	parallel	07:18	1959			VIRUS	sci							Yes
0017	QID 472	07:19	915.9	5.7	G26-2-002	HPF	sci	1.49	0.89	20.46	0.80	108		Yes
0018	QID 472	07:35	915.9	0.7	G26-2-002	HPF	sci	2.44	1.71	20.58	0.84	79		Yes
0019	LFC Cal	07:52	106.5			HPF	cal							Yes
0020	QID 109	08:02	969.1	11.8	UT26-2-019	HPF	sci	2.06	1.34	20.67	0.92	286		Yes
virus0000012_01	parallel	08:02	1023			VIRUS	sci							Yes
0021	LFC Cal	08:20	106.5			HPF	cal							Yes
0022	LFC Cal	08:24	106.5			HPF	cal							Yes
lrs20000008_01	parallel	08:24	360			LRS2	sci							Yes
virus0000013_01	QID 561	08:24	360	6.0	UT26-2-016	VIRUS	sci	2.01	1.33	21.91	0.68			Yes
0023	LFC Cal	08:27	106.5			HPF	cal							Yes
lrs20000008_02	parallel	08:31	360			LRS2	sci							Yes
virus0000013_02	QID 561	08:31	360	1.0	UT26-2-016	VIRUS	sci	1.98	1.62	21.95	0.78			Yes
lrs20000008_03	parallel	08:39	360			LRS2	sci							Yes
virus0000013_03	QID 561	08:39	360	2.0	UT26-2-016	VIRUS	sci	1.86	1.45	21.93	0.77			Yes
0024	LFC Cal	08:56	106.5			HPF	cal							Yes
virus0000014_01	parallel	08:56	1500			VIRUS	sci							Yes
lrs20000009_01	QID 649	08:56	1500	11.0	PSU26-2-004	LRS2-B	sci	2.38	1.48	21.42	0.51			Yes
0025	LFC Cal	08:58	106.5			HPF	cal							Yes
0026	LFC Cal	09:00	106.5			HPF	cal							Yes
0027	LFC Cal	09:26	106.5			HPF	cal							Yes
virus0000015_01	parallel	09:26	1200			VIRUS	sci							Yes
lrs20000010_01	QID 654	09:26	1200	5.0	PSU26-2-004	LRS2-B	sci	2.81	1.80	21.60	0.39			No
0028	LFC Cal	09:29	106.5			HPF	cal							Yes
0029	LFC Cal	09:31	106.5			HPF	cal							Yes
lrs20000011_01	bias	10:30	0			LRS2	cal							Yes
virus0000016_01	bias	10:31	0			VIRUS	cal							Yes
virus0000017_01	Cd-A	10:35	15		ENG26-2-002	VIRUS	cal							Yes
virus0000018_01	Hg	10:36	15		ENG26-2-002	VIRUS	cal							Yes
0030	Dark	10:42	319.5			HPF	cal							Yes
0031	Quartz FCU	10:53	74.5			HPF	cal							Yes
0032	Quartz FCU	10:55	74.5			HPF	cal							Yes
0033	Quartz FCU	10:57	74.5			HPF	cal							Yes
0034	Quartz FCU	10:59	74.5			HPF	cal							Yes
0035	Quartz FCU	11:00	74.5			HPF	cal							Yes
0036	Quartz FCU	11:02	74.5			HPF	cal							Yes
0037	Quartz FCU	11:04	74.5			HPF	cal							Yes
0038	Alpha Bright Cal	11:06	85.2			HPF	cal							Yes
0039	Alpha Bright Cal	11:08	85.2			HPF	cal							Yes
0040	Alpha Bright Cal	11:10	85.2			HPF	cal							Yes
0041	Alpha Bright Cal	11:12	85.2			HPF	cal							Yes
0042	LFC FCU	11:15	106.5			HPF	cal							Yes
0043	LFC FCU	11:17	106.5			HPF	cal							Yes
0044	LFC FCU	11:20	106.5			HPF	cal							Yes
0045	LFC FCU	11:22	106.5			HPF	cal							Yes
0046	LFC FCU	11:24	106.5			HPF	cal							Yes
0047	LFC FCU	11:26	106.5			HPF	cal							Yes
0048	LFC Cal	11:29	106.5			HPF	cal							Yes
0049	LFC Cal	11:32	106.5			HPF	cal							Yes
lrs20000012_01	flat_Qth_R	11:34	15			LRS2	cal							Yes
lrs20000012_02	flat_Qth_R	11:36	15			LRS2	cal							Yes
lrs20000012_03	flat_Qth_R	11:37	15			LRS2	cal							Yes
lrs20000012_04	flat_Qth_R	11:38	15			LRS2	cal							Yes
0050	Etalon Cal	11:39	159.8			HPF	cal							Yes
lrs20000012_05	flat_Qth_R	11:39	15			LRS2	cal							Yes
lrs20000013_01	flat_ldls_long_B	11:40	20			LRS2	cal							Yes
lrs20000013_02	flat_ldls_long_B	11:42	20			LRS2	cal							Yes
0051	Etalon Cal	11:43	159.8			HPF	cal							Yes
lrs20000013_03	flat_ldls_long_B	11:43	20			LRS2	cal							Yes
lrs20000014_01	Cd-A_B	11:44	29			LRS2	cal							Yes
0052	Etalon Cal	11:46	159.8			HPF	cal							Yes
lrs20000014_02	Cd-A_B	11:46	29			LRS2	cal							Yes
lrs20000014_03	Cd-A_B	11:47	29			LRS2	cal							Yes
0053	Etalon Cal	11:49	159.8			HPF	cal							Yes
lrs20000015_01	FeAr_R	11:49	15			LRS2	cal							Yes
lrs20000015_02	FeAr_R	11:50	15			LRS2	cal							Yes
lrs20000015_03	FeAr_R	11:51	15			LRS2	cal							Yes
lrs20000016_01	Hg_R	11:52	20			LRS2	cal							Yes
0054	UNe Slave Cal	11:53	426			HPF	cal							Yes
lrs20000016_02	Hg_R	11:54	20			LRS2	cal							Yes
lrs20000016_03	Hg_R	11:55	20			LRS2	cal							Yes
lrs20000017_01	Hg_B	11:56	15			LRS2	cal							Yes
lrs20000017_02	Hg_B	11:58	15			LRS2	cal							Yes
lrs20000017_03	Hg_B	11:59	15			LRS2	cal							Yes
0055	UNe Slave Cal	12:00	426			HPF	cal							Yes
virus0000019_01	flat_ldls_long	12:05	15			VIRUS	cal							Yes
virus0000019_02	flat_ldls_long	12:07	15			VIRUS	cal							Yes
0056	UNe Slave Cal	12:08	426			HPF	cal							Yes
virus0000019_03	flat_ldls_long	12:08	15			VIRUS	cal							Yes
virus0000020_01	Cd-A	12:10	15			VIRUS	cal							Yes
virus0000020_02	Cd-A	12:11	15			VIRUS	cal							Yes
virus0000020_03	Cd-A	12:12	15			VIRUS	cal							Yes
virus0000021_01	Hg	12:14	15			VIRUS	cal							Yes
virus0000021_02	Hg	12:15	15			VIRUS	cal							Yes
0057	UNe Slave Cal	12:16	426			HPF	cal							Yes
virus0000021_03	Hg	12:17	15			VIRUS	cal							Yes
0058	UNe Slave Cal	12:24	426			HPF	cal							Yes
0059	UNe Slave Cal	12:31	426			HPF	cal							Yes
0096	LFC Cal	23:51	106.5			HPF	cal							Yes

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