HET Night Report Reader

Civil Date	Ephemerides
2026-04-15	Sunset			Sunrise			Moon
	Set	12°	18°	18°	12°	Rise	Rise	Set
	01:31	02:18	02:48	11:03	11:33	12:20	11:46	-
Night Length	8:15		Sunset Temperature

On-Duty Personnel
Resident Astronomer	Telescope Operator
Zach Vanderbosch	Aiden Dillard Cassie Crowe

Overlaps		none

Other Personnel	Nicole Wilson

Guests	none

Open/Close Log
Open time	Outdoor temp	Truss temp	Close time	Reason	Time open
01:28	16.1	11.7	05:32	PR	04:04
05:58	14.0	17.4	11:32	twilight	05:34
Total Time Open					9:38

Program	Night Priority	Science
02:48	Idle due to weather (Transparency)
03:02	Science

Stack Data
Start	Stop	ee50	ee80	Hefi Focus	Mars Focus	Outside Temp	Dome Temp	Truss Temp	Wind Direction	Wind Speed	Stack Type
01:57	02:33	0.62	1.24	60	-5207	16.1	16.3	19.1	263	13	First of Night
05:59	06:21	0.41	0.69	70	-4045	14.5	14.8	14.7	310	9	Stack/Re-stack
11:22	11:32	0.67	1.07	110	-4045	15.2	15.3	15.1	7	1	Post-Observing

Problem Reports
PR Number	Times	Time Lost	Description	Response
6476	03:24-03:24	00:00	Truss temperature not accurate.	Referred to old AHU average truss temperature.
6667	03:35-05:59	02:24	Mirror 5:1 attempting to make large moves (~100 tip) but not making any moves. Affecting mirrors 5:2 and 4:1 to where no moves could be made.	Called: Nicole Took out and covered mirrors 5:1, 5:2, and 4:1.

TO Comments	Beginning of the night was significantly affected by mirror issues. Once resolved, conditions were stable. Clear sky conditions and good science.

RA Comments	none

Observations
File	Target/QID	Exp Start	Exposure	Overhead	Program	Instrument Configuration	Data Type	IQ	Dimm	SkySBrt	Skytrans	SNR	Comments	Charge
virus0000028_03	bias	00:00	0			VIRUS	cal							Yes
lrs20000028_04	bias	00:00	0			LRS2	cal							Yes
virus0000028_04	bias	00:00	0			VIRUS	cal							Yes
lrs20000028_05	bias	00:01	0			LRS2	cal							Yes
virus0000028_05	bias	00:01	0			VIRUS	cal							Yes
lrs20000028_06	bias	00:02	0			LRS2	cal							Yes
virus0000028_06	bias	00:02	0			VIRUS	cal							Yes
lrs20000028_07	bias	00:03	0			LRS2	cal							Yes
virus0000028_07	bias	00:03	0			VIRUS	cal							Yes
lrs20000028_08	bias	00:04	0			LRS2	cal							Yes
virus0000028_08	bias	00:04	0			VIRUS	cal							Yes
lrs20000028_09	bias	00:04	0			LRS2	cal							Yes
lrs20000028_10	bias	00:05	0			LRS2	cal							Yes
virus0000028_09	bias	00:05	0			VIRUS	cal							Yes
virus0000028_10	bias	00:06	0			VIRUS	cal							Yes
lrs20000028_11	bias	00:06	0			LRS2	cal							Yes
virus0000028_11	bias	00:07	0			VIRUS	cal							Yes
lrs20000029_01	dark	00:07	360			LRS2	cal							Yes
virus0000029_01	dark	00:07	360			VIRUS	cal							Yes
lrs20000029_02	dark	00:14	360			LRS2	cal							Yes
virus0000029_02	dark	00:14	360			VIRUS	cal							Yes
lrs20000029_03	dark	00:21	360			LRS2	cal							Yes
virus0000029_03	dark	00:21	360			VIRUS	cal							Yes
lrs20000001_01	skyflat	01:36	7			LRS2	cal							Yes
lrs20000002_01	skyflat	01:37	10			LRS2	cal							Yes
lrs20000003_01	skyflat	01:38	13			LRS2	cal							Yes
lrs20000004_01	skyflat	01:39	16			LRS2	cal							Yes
lrs20000005_01	skyflat	01:41	22			LRS2	cal							Yes
lrs20000006_01	skyflat	01:42	30			LRS2	cal							Yes
virus0000001_01	skyflat	01:45	7			VIRUS	cal							Yes
virus0000002_01	skyflat	01:46	10			VIRUS	cal							Yes
virus0000003_01	skyflat	01:47	14			VIRUS	cal							Yes
virus0000004_01	skyflat	01:49	18			VIRUS	cal							Yes
virus0000005_01	skyflat	01:50	26			VIRUS	cal							Yes
virus0000006_01	parallel	02:44	1080			VIRUS	sci							Yes
lrs20000007_01	QID 17	02:44	1080	11.0	PSU26-2-012	LRS2-B	sci	1.82		21.87	0.76		Transparency non-photometric.	No
0001	LFC Cal	02:45	106.5			HPF	cal							Yes
0002	LFC Cal	02:47	106.5			HPF	cal							Yes
0003	LFC Cal	02:49	106.5			HPF	cal							Yes
0004	QID 792	03:12	308.9	9.9	UT26-2-005	HPF	sci	1.82		20.23	0.90	259		Yes
virus0000007_01	parallel	03:12	1417			VIRUS	sci							Yes
0005	QID 792	03:18	308.9	0.9	UT26-2-005	HPF	sci	1.97		20.24	0.87	241		Yes
0006	QID 792	03:24	308.9	0.9	UT26-2-005	HPF	sci	2.08		20.31	0.83	260		Yes
0007	QID 792	03:29	308.9	0.9	UT26-2-005	HPF	sci	2.18		20.34	0.79	254		Yes
0008	LFC Cal	04:20	106.5			HPF	cal							Yes
0009	LFC Cal	04:23	106.5			HPF	cal							Yes
0010	LFC Cal	04:25	106.5			HPF	cal							Yes
0011	LFC Cal	06:03	106.5			HPF	cal							Yes
0012	LFC Cal	06:05	106.5			HPF	cal							Yes
0013	LFC Cal	06:07	106.5			HPF	cal							Yes
0014	LFC Cal	06:25	106.5			HPF	cal							Yes
virus0000008_01	parallel	06:25	900			VIRUS	sci							Yes
lrs20000008_01	QID 15	06:25	900	4.0	PSU26-2-005	LRS2-R	sci	1.75		20.94	0.97			Yes
0015	LFC Cal	06:27	106.5			HPF	cal							Yes
0016	LFC Cal	06:30	106.5			HPF	cal							Yes
0017	QID 673	06:53	969.1	12.8	PSU26-2-013	HPF	sci	1.91		20.32	0.97	204		Yes
virus0000009_01	parallel	06:53	2047			VIRUS	sci							Yes
0018	QID 673	07:10	969.1	1.8	PSU26-2-013	HPF	sci	2.10		20.29	1.00	190		Yes
0019	LFC Cal	07:28	106.5			HPF	cal							Yes
0020	LFC Cal	07:32	106.5			HPF	cal							Yes
lrs20000009_01	parallel	07:32	360			LRS2	sci							Yes
virus0000010_01	QID 554	07:32	360	5.0	UT26-2-016	VIRUS	sci	2.08		22.11	0.88			Yes
0021	LFC Cal	07:34	106.5			HPF	cal							Yes
lrs20000009_02	parallel	07:39	360			LRS2	sci							Yes
virus0000010_02	QID 554	07:39	360	1.0	UT26-2-016	VIRUS	sci	1.92		22.08	0.87			Yes
lrs20000009_03	parallel	07:46	360			LRS2	sci							Yes
virus0000010_03	QID 554	07:46	360	1.0	UT26-2-016	VIRUS	sci	1.94		22.08	0.87			Yes
virus0000011_01	HZ21_042_W	07:58	60	6.0		VIRUS	spec	1.88		22.09	0.50			Yes
virus0000011_02	HZ21_042_W	08:00	60	1.0		VIRUS	spec	1.91		22.08	0.50			Yes
virus0000011_03	HZ21_042_W	08:02	60	1.0		VIRUS	spec	1.91		22.08	0.50			Yes
lrs20000010_01	BD+601753_056_E	08:09	30	6.5		LRS2	spec	2.08		21.90	0.95			Yes
lrs20000011_01	BD+601753_066_E	08:13	30	2.5		LRS2	spec	2.03		20.72	0.94			Yes
0022	LFC Cal	08:22	106.5			HPF	cal							Yes
virus0000012_01	parallel	08:22	1800			VIRUS	sci							Yes
lrs20000012_01	QID 465	08:22	1800	9.0	UT26-2-018	LRS2-B	sci	1.91		22.16	0.83			Yes
0023	LFC Cal	08:24	106.5			HPF	cal							Yes
0024	LFC Cal	08:26	106.5			HPF	cal							Yes
virus0000013_01	parallel	08:55	900			VIRUS	sci							Yes
lrs20000013_01	QID 466	08:55	900	3.0	UT26-2-018	LRS2-R	sci	1.62		21.14	0.89			Yes
0025	LFC Cal	08:56	106.5			HPF	cal							Yes
0026	LFC Cal	08:58	106.5			HPF	cal							Yes
0027	LFC Cal	09:00	106.5			HPF	cal							Yes
0028	HR5023_tell_std	09:19	117.2	9.0		HPF	telluric	1.74		20.95	0.92			Yes
0029	QID 176	09:28	213	7.5	UT26-2-011	HPF	sci	2.03		20.49	0.84	160		Yes
0030	LFC Cal	09:41	106.5			HPF	cal							Yes
lrs20000014_01	parallel	09:41	1000			LRS2	sci							Yes
virus0000014_01	QID 209	09:41	1000	8.3	PSU26-2-003	VIRUS	sci	1.42		22.46	0.84			Yes
0031	LFC Cal	09:43	106.5			HPF	cal							Yes
0032	LFC Cal	09:46	106.5			HPF	cal							Yes
lrs20000014_02	parallel	09:59	1000			LRS2	sci							Yes
virus0000014_02	QID 209	09:59	1000	1.3	PSU26-2-003	VIRUS	sci	1.56		22.45	0.87			Yes
lrs20000014_03	parallel	10:17	1000			LRS2	sci							Yes
virus0000014_03	QID 209	10:17	1000	1.3	PSU26-2-003	VIRUS	sci	1.50		22.38	0.77			Yes
virus0000015_01	parallel	10:38	2047			VIRUS	sci							Yes
0033	QID 774	10:39	969.1	5.8	UT26-2-007	HPF	sci	1.44		20.56	0.87	26		Yes
0034	QID 774	10:56	969.1	0.8	UT26-2-007	HPF	sci	1.52		20.56	0.89	27		Yes
0035	QID 185	11:19	117.2	7.0	UT26-2-011	HPF	sci	1.63		20.46	0.65	332		Yes
lrs20000015_01	bias	11:23	0			LRS2	cal							Yes
virus0000016_01	bias	11:24	0			VIRUS	cal							Yes
virus0000017_01	Cd-A	11:28	15		ENG26-2-002	VIRUS	cal							Yes
virus0000018_01	Hg	11:29	15		ENG26-2-002	VIRUS	cal							Yes
0036	Dark	11:37	319.5			HPF	cal							Yes
0037	Quartz FCU	11:48	74.5			HPF	cal							Yes
0038	Quartz FCU	11:50	74.5			HPF	cal							Yes
0039	Quartz FCU	11:52	74.5			HPF	cal							Yes
0040	Quartz FCU	11:54	74.5			HPF	cal							Yes
0041	Quartz FCU	11:55	74.5			HPF	cal							Yes
0042	Quartz FCU	11:57	74.5			HPF	cal							Yes
0043	Quartz FCU	11:59	74.5			HPF	cal							Yes
0044	Alpha Bright Cal	12:01	85.2			HPF	cal							Yes
0045	Alpha Bright Cal	12:03	85.2			HPF	cal							Yes
0046	Alpha Bright Cal	12:05	85.2			HPF	cal							Yes
0047	Alpha Bright Cal	12:07	85.2			HPF	cal							Yes
0048	LFC FCU	12:10	106.5			HPF	cal							Yes
0049	LFC FCU	12:12	106.5			HPF	cal							Yes
0050	LFC FCU	12:14	106.5			HPF	cal							Yes
0051	LFC FCU	12:17	106.5			HPF	cal							Yes
0052	LFC FCU	12:19	106.5			HPF	cal							Yes
0053	LFC FCU	12:21	106.5			HPF	cal							Yes
0054	LFC Cal	12:24	106.5			HPF	cal							Yes
0055	LFC Cal	12:27	106.5			HPF	cal							Yes
0056	Etalon Cal	12:34	159.8			HPF	cal							Yes
0057	Etalon Cal	12:37	159.8			HPF	cal							Yes
0058	Etalon Cal	12:41	159.8			HPF	cal							Yes
0059	Etalon Cal	12:44	159.8			HPF	cal							Yes
0060	UNe Slave Cal	12:47	426			HPF	cal							Yes
0061	UNe Slave Cal	12:55	426			HPF	cal							Yes
0062	UNe Slave Cal	13:03	426			HPF	cal							Yes
0063	UNe Slave Cal	13:11	426			HPF	cal							Yes
0064	UNe Slave Cal	13:19	426			HPF	cal							Yes
0065	UNe Slave Cal	13:26	426			HPF	cal							Yes
lrs20009900_01	bias	21:54	0			LRS2	cal							Yes
virus0009900_01	flat_Qth	21:54	20			VIRUS	cal							Yes
virus0009901_01	bias	21:56	0			VIRUS	cal							Yes
lrs20009901_01	flat_ldls_long_B	21:57	20			LRS2	cal							Yes
virus0009902_01	dark	21:58	15			VIRUS	cal							Yes
lrs20009902_01	Cd-A_B	21:59	29			LRS2	cal							Yes
lrs20009903_01	FeAr_R	22:00	15			LRS2	cal							Yes
lrs20009904_01	Hg_B	22:02	15			LRS2	cal							Yes
0073	Dark	22:31	319.5			HPF	cal							Yes
0074	Quartz FCU	22:37	74.5			HPF	cal							Yes
0075	Quartz FCU	22:39	74.5			HPF	cal							Yes
0076	Quartz FCU	22:41	74.5			HPF	cal							Yes
0077	Quartz FCU	22:43	74.5			HPF	cal							Yes
0078	Quartz FCU	22:44	74.5			HPF	cal							Yes
0079	Quartz FCU	22:46	74.5			HPF	cal							Yes
0080	Quartz FCU	22:48	74.5			HPF	cal							Yes
0081	Alpha Bright Cal	22:50	85.2			HPF	cal							Yes
0082	Alpha Bright Cal	22:52	85.2			HPF	cal							Yes
0083	Alpha Bright Cal	22:54	85.2			HPF	cal							Yes
0084	Alpha Bright Cal	22:56	85.2			HPF	cal							Yes
0085	LFC FCU	22:59	106.5			HPF	cal							Yes
0086	LFC FCU	23:01	106.5			HPF	cal							Yes
0087	LFC Cal	23:04	106.5			HPF	cal							Yes
0088	LFC Cal	23:06	106.5			HPF	cal							Yes
0089	Etalon Cal	23:09	159.8			HPF	cal							Yes
0090	UNe Slave Cal	23:13	426			HPF	cal							Yes
lrs20000022_01	flat_Qth_R	23:13	15			LRS2	cal							Yes
lrs20000022_02	flat_Qth_R	23:14	15			LRS2	cal							Yes
lrs20000022_03	flat_Qth_R	23:16	15			LRS2	cal							Yes
lrs20000022_04	flat_Qth_R	23:17	15			LRS2	cal							Yes
lrs20000022_05	flat_Qth_R	23:18	15			LRS2	cal							Yes
lrs20000023_01	flat_ldls_long_B	23:20	20			LRS2	cal							Yes
0091	UNe Slave Cal	23:20	426			HPF	cal							Yes
lrs20000023_02	flat_ldls_long_B	23:21	20			LRS2	cal							Yes
lrs20000023_03	flat_ldls_long_B	23:22	20			LRS2	cal							Yes
lrs20000024_01	Cd-A_B	23:24	29			LRS2	cal							Yes
lrs20000024_02	Cd-A_B	23:25	29			LRS2	cal							Yes
lrs20000024_03	Cd-A_B	23:27	29			LRS2	cal							Yes
0092	UNe Slave Cal	23:28	426			HPF	cal							Yes
lrs20000025_01	FeAr_R	23:28	15			LRS2	cal							Yes
lrs20000025_02	FeAr_R	23:29	15			LRS2	cal							Yes
lrs20000025_03	FeAr_R	23:31	15			LRS2	cal							Yes
lrs20000026_01	Hg_R	23:32	20			LRS2	cal							Yes
lrs20000026_02	Hg_R	23:33	20			LRS2	cal							Yes
lrs20000026_03	Hg_R	23:35	20			LRS2	cal							Yes
0093	UNe Slave Cal	23:36	426			HPF	cal							Yes
lrs20000027_01	Hg_B	23:36	15			LRS2	cal							Yes
lrs20000027_02	Hg_B	23:37	15			LRS2	cal							Yes
lrs20000027_03	Hg_B	23:38	15			LRS2	cal							Yes
0094	UNe Slave Cal	23:44	426			HPF	cal							Yes
virus0000025_01	flat_ldls_long	23:45	15			VIRUS	cal							Yes
virus0000025_02	flat_ldls_long	23:46	15			VIRUS	cal							Yes
virus0000025_03	flat_ldls_long	23:48	15			VIRUS	cal							Yes
virus0000026_01	Cd-A	23:49	15			VIRUS	cal							Yes
0095	UNe Slave Cal	23:51	426			HPF	cal							Yes
virus0000026_02	Cd-A	23:51	15			VIRUS	cal							Yes
virus0000026_03	Cd-A	23:52	15			VIRUS	cal							Yes
virus0000027_01	Hg	23:53	15			VIRUS	cal							Yes
virus0000027_02	Hg	23:55	15			VIRUS	cal							Yes
virus0000027_03	Hg	23:56	15			VIRUS	cal							Yes
lrs20000028_01	bias	23:58	0			LRS2	cal							Yes
virus0000028_01	bias	23:58	0			VIRUS	cal							Yes
lrs20000028_02	bias	23:58	0			LRS2	cal							Yes
virus0000028_02	bias	23:59	0			VIRUS	cal							Yes
lrs20000028_03	bias	23:59	0			LRS2	cal							Yes