HET Night Report Reader

Civil Date	Ephemerides
2026-04-17	Sunset			Sunrise			Moon
	Set	12°	18°	18°	12°	Rise	Rise	Set
	01:32	02:19	02:49	11:00	11:30	12:18	-	01:59
Night Length	8:11		Sunset Temperature

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

Overlaps
TO Overlap	RA Overlap
Justen Pautzke	Sergey Rostopchin

Other Personnel	Chris Robison, George Damm

Guests	none

Open/Close Log
Open time	Outdoor temp	Truss temp	Close time	Reason	Time open
00:29	21.1	17.1	00:55	engineering	00:26
01:30	19.4	17.0	08:07	clouds	06:37
Total Time Open					7:03

Program	Night Priority	Science
02:49	Science
05:30	Idle due to weather (Clouds)
06:09	Science
07:12	Idle due to weather (Clouds, wind, dust)

Stack Data
Start	Stop	ee50	ee80	Hefi Focus	Mars Focus	Outside Temp	Dome Temp	Truss Temp	Wind Direction	Wind Speed	Stack Type
02:05	02:26	0.57	1.08	100	-6188	19.6	17.5	17.3	285	2	First of Night

Problem Reports
PR Number	Times	Time Lost	Description	Response
6668	09:00-09:45	00:45	Sensors on 6:2 all were flashing -384, SAMS RSE and TRSE spiked to over 40,000.	Took out sensors until SAMS returned to normal operating levels, restarted SAMS

TO Comments	Intermittent clouds affected multiple science exposures. A couple of targets also aborted. High cloud cover occurred causing dome closure, followed by sudden high winds. Ended early due to high dust.

RA Comments	none

Observations
File	Target/QID	Exp Start	Exposure	Overhead	Program	Instrument Configuration	Data Type	IQ	Dimm	SkySBrt	Skytrans	SNR	Comments	Charge
lrs20000026_03	dark	00:04	360			LRS2	cal							Yes
virus0000027_03	dark	00:04	360			VIRUS	cal							Yes
lrs20000001_01	skyflat	01:37	7			LRS2	cal							Yes
lrs20000002_01	skyflat	01:38	10			LRS2	cal							Yes
lrs20000003_01	skyflat	01:39	13			LRS2	cal							Yes
lrs20000004_01	skyflat	01:41	16			LRS2	cal							Yes
lrs20000005_01	skyflat	01:42	22			LRS2	cal							Yes
lrs20000006_01	skyflat	01:43	30			LRS2	cal							Yes
virus0000001_01	skyflat	01:46	7			VIRUS	cal							Yes
virus0000002_01	skyflat	01:47	10			VIRUS	cal							Yes
virus0000003_01	skyflat	01:49	14			VIRUS	cal							Yes
virus0000004_01	skyflat	01:50	18			VIRUS	cal							Yes
virus0000005_01	skyflat	01:51	26			VIRUS	cal							Yes
virus0000006_01	parallel	02:33	2047			VIRUS	sci							Yes
0001	QID 801	02:34	969.1	7.8	PSU26-2-015	HPF	sci	1.60		19.96	0.97	195		Yes
0002	QID 801	02:51	969.1	0.8	PSU26-2-015	HPF	sci	1.54	0.77	19.82	0.93	122	Transparency innacurate for second exposure, closer to 50% due to patchy clouds. Please check data quality and reject if needed.	Yes
0003	LFC Cal	03:09	106.5			HPF	cal							Yes
0004	QID 795	03:15	308.9	7.9	UT26-2-005	HPF	sci	1.54	0.85	20.24	0.97	353		Yes
virus0000007_01	parallel	03:15	1417			VIRUS	sci							Yes
0005	QID 795	03:21	308.9	0.9	UT26-2-005	HPF	sci	1.47	0.80	20.25	0.96	374		Yes
0006	QID 795	03:27	308.9	0.9	UT26-2-005	HPF	sci	1.43	0.74	20.27	0.95	369		Yes
0007	QID 795	03:32	308.9	-0.1	UT26-2-005	HPF	sci	1.40	0.80	20.20	0.98	346		Yes
0008	LFC Cal	03:44	106.5			HPF	cal							Yes
lrs20000007_01	parallel	03:44	360			LRS2	sci							Yes
virus0000008_01	QID 548	03:44	360	7.0	UT26-2-016	VIRUS	sci	1.62	0.83	21.77	0.76			Yes
0009	LFC Cal	03:46	106.5			HPF	cal							Yes
lrs20000007_02	parallel	03:51	360			LRS2	sci							Yes
virus0000008_02	QID 548	03:51	360	1.0	UT26-2-016	VIRUS	sci	1.63	0.70	21.76	0.75			Yes
lrs20000007_03	parallel	03:58	360			LRS2	sci							Yes
virus0000008_03	QID 548	03:58	360	1.0	UT26-2-016	VIRUS	sci	1.52	0.85	21.71	0.70			Yes
lrs20000008_01	HD116405_056_E	04:13	15	8.8		LRS2	spec	1.57	0.80	22.41	0.76			Yes
lrs20000009_01	HD116405_066_E	04:17	15	4.8		LRS2	spec	1.30	0.81	21.08	0.51			Yes
lrs20000010_01	parallel	04:22	600			LRS2	sci							Yes
0010	LFC Cal	04:23	106.5			HPF	cal							Yes
virus0000009_01	QID 231	04:23	600	5.0	PSU26-2-003	VIRUS	sci	1.44	0.78	22.02	0.86			Yes
0011	LFC Cal	04:25	106.5			HPF	cal							Yes
0012	LFC Cal	04:27	106.5			HPF	cal							Yes
lrs20000010_02	parallel	04:34	600			LRS2	sci							Yes
virus0000009_02	QID 231	04:34	600	1.0	PSU26-2-003	VIRUS	sci	1.43	0.83	21.99	0.87			Yes
lrs20000010_03	parallel	04:45	600			LRS2	sci							Yes
virus0000009_03	QID 231	04:45	600	1.0	PSU26-2-003	VIRUS	sci	1.42	0.93	21.95	0.84			Yes
0013	LFC Cal	04:59	106.5			HPF	cal							Yes
lrs20000011_01	parallel	04:59	360			LRS2	sci							Yes
virus0000010_01	QID 552	04:59	360	4.0	UT26-2-016	VIRUS	sci	1.33	0.93	21.84	0.83			Yes
0014	LFC Cal	05:02	106.5			HPF	cal							Yes
lrs20000011_02	parallel	05:06	360			LRS2	sci							Yes
virus0000010_02	QID 552	05:06	360	1.0	UT26-2-016	VIRUS	sci	1.31	0.87	21.87	0.77			Yes
lrs20000011_03	parallel	05:14	360			LRS2	sci							Yes
virus0000010_03	QID 552	05:14	360	2.0	UT26-2-016	VIRUS	sci	1.47	0.77	21.85	0.77			Yes
0015	QID 158	05:27	181.1	7.0	UT26-2-011	HPF	sci	1.29	0.74	20.56	0.75	274		Yes
virus0000011_01	parallel	05:34	2497			VIRUS	eng							Yes
0016	AD_Leo	05:35	159.8	5.3	ENG26-2-000	HPF	eng	1.33	0.82	19.55	0.95	407	Thick clouds rolled in during third to last exposure. Aborted final exposure due to clouds and target drift after losing guide stars.	No
0017	AD_Leo	05:38	159.8	0.3	ENG26-2-000	HPF	eng	1.37	0.93	19.56	0.94	412		No
0018	AD_Leo	05:41	159.8	0.3	ENG26-2-000	HPF	eng	1.38	0.85	19.56	0.92	417		No
0019	AD_Leo	05:44	159.8	0.3	ENG26-2-000	HPF	eng	1.44	0.91	19.54	0.89	412		No
0020	AD_Leo	05:48	159.8	0.3	ENG26-2-000	HPF	eng	1.52	1.20	19.46	0.87	420		No
0021	AD_Leo	05:51	159.8	0.3	ENG26-2-000	HPF	eng	1.75	1.19	19.51	0.85	390		No
0022	AD_Leo	05:54	159.8	1.3	ENG26-2-000	HPF	eng	1.66	1.23	19.56	0.90	429		No
0023	AD_Leo	05:57	159.8	0.3	ENG26-2-000	HPF	eng	1.61	1.16	19.48	0.91	426		No
0024	AD_Leo	06:00	159.8	0.3	ENG26-2-000	HPF	eng	1.73	1.25	19.22	0.86	308		No
0025	AD_Leo	06:04	159.8	0.3	ENG26-2-000	HPF	eng					5	Thick clouds and lost the guide stars.	No
0026	AD_Leo	06:07	159.8	0.3	ENG26-2-000	HPF	eng		1.40			3	Thick clouds and lost the guide stars.	No
0027	LFC Cal	06:11	106.5			HPF	cal							Yes
0028	HR5770_tell_std	06:19	330.2	10.5		HPF	telluric	1.79	1.14	20.72	0.88			Yes
virus0000012_01	P330E_034_E	06:30	60	5.0		VIRUS	spec	1.62	1.16	22.24	0.57			Yes
virus0000012_02	P330E_034_E	06:32	60	1.0		VIRUS	spec	1.68	1.04	22.20	0.57			Yes
virus0000012_03	P330E_034_E	06:34	60	1.0		VIRUS	spec	1.68	1.00	22.18	0.56			Yes
virus0000013_01	parallel	06:40	374			VIRUS	sci							Yes
0029	QID 628	06:41	340.8	5.3	PSU26-2-014	HPF	sci	1.54	1.07	20.53	0.70	438		Yes
lrs20000012_01	parallel	06:51	360			LRS2	sci							Yes
virus0000014_01	QID 556	06:51	360	5.0	UT26-2-016	VIRUS	sci	1.51	0.87	22.02	0.87			Yes
0030	LFC Cal	06:52	106.5			HPF	cal							Yes
0031	LFC Cal	06:54	106.5			HPF	cal							Yes
lrs20000012_02	parallel	06:58	360			LRS2	sci							Yes
virus0000014_02	QID 556	06:58	360	1.0	UT26-2-016	VIRUS	sci	1.48	0.91	22.04	0.86			Yes
lrs20000012_03	parallel	07:06	360			LRS2	sci							Yes
virus0000014_03	QID 556	07:06	360	2.0	UT26-2-016	VIRUS	sci	1.48	0.92	22.04	0.86			Yes
0032	LFC Cal	07:15	106.5			HPF	cal							Yes
lrs20000013_01	parallel	07:15	360			LRS2	sci							Yes
virus0000015_01	QID 554	07:15	360	3.0	UT26-2-016	VIRUS	sci	1.67	0.86	22.07	0.46		Clouds, low transparency.	No
0033	LFC Cal	07:18	106.5			HPF	cal							Yes
lrs20000013_02	parallel	07:22	360			LRS2	sci							Yes
virus0000015_02	QID 554	07:22	360	1.0	UT26-2-016	VIRUS	sci	1.68	1.02	21.99	0.12			No
lrs20000013_03	parallel	07:29	360			LRS2	sci							Yes
virus0000015_03	QID 554	07:29	360	1.0	UT26-2-016	VIRUS	sci	1.71	1.02	22.15	0.86			No
virus0000016_01	parallel	07:49	2047			VIRUS	sci							Yes
0034	QID 807	07:50	969.1	14.8	PSU26-2-015	HPF	sci	1.57	1.21	20.22	0.47	39	Clouds, low transparency. Aborted second exposure.	No
0035	LFC Cal	08:07	106.5			HPF	cal							Yes
0036	LFC Cal	08:59	106.5			HPF	cal							Yes
0037	LFC Cal	09:01	106.5			HPF	cal							Yes
0038	LFC Cal	09:04	106.5			HPF	cal							Yes
0039	LFC Cal	09:41	106.5			HPF	cal							Yes
0040	LFC Cal	09:43	106.5			HPF	cal							Yes
0041	LFC Cal	09:46	106.5			HPF	cal							Yes
lrs20000014_01	bias	10:06	0			LRS2	cal							Yes
virus0000017_01	bias	10:07	0			VIRUS	cal							Yes
virus0000018_01	Cd-A	10:11	15		ENG26-2-002	VIRUS	cal							Yes
virus0000019_01	Hg	10:13	15		ENG26-2-002	VIRUS	cal							Yes
0042	Dark	10:22	319.5			HPF	cal							Yes
0043	Quartz FCU	10:34	74.5			HPF	cal							Yes
0044	Quartz FCU	10:35	74.5			HPF	cal							Yes
0045	Quartz FCU	10:37	74.5			HPF	cal							Yes
0046	Quartz FCU	10:39	74.5			HPF	cal							Yes
0047	Quartz FCU	10:41	74.5			HPF	cal							Yes
0048	Quartz FCU	10:42	74.5			HPF	cal							Yes
0049	Quartz FCU	10:44	74.5			HPF	cal							Yes
0050	Alpha Bright Cal	10:46	85.2			HPF	cal							Yes
0051	Alpha Bright Cal	10:48	85.2			HPF	cal							Yes
0052	Alpha Bright Cal	10:50	85.2			HPF	cal							Yes
0053	Alpha Bright Cal	10:52	85.2			HPF	cal							Yes
0054	LFC FCU	10:55	106.5			HPF	cal							Yes
0055	LFC FCU	10:57	106.5			HPF	cal							Yes
0056	LFC FCU	11:00	106.5			HPF	cal							Yes
0057	LFC FCU	11:02	106.5			HPF	cal							Yes
0058	LFC FCU	11:04	106.5			HPF	cal							Yes
0059	LFC FCU	11:07	106.5			HPF	cal							Yes
0060	LFC Cal	11:10	106.5			HPF	cal							Yes
0061	LFC Cal	11:12	106.5			HPF	cal							Yes
0062	Etalon Cal	11:20	159.8			HPF	cal							Yes
0063	Etalon Cal	11:23	159.8			HPF	cal							Yes
0064	Etalon Cal	11:26	159.8			HPF	cal							Yes
0065	Etalon Cal	11:29	159.8			HPF	cal							Yes
0066	UNe Slave Cal	11:33	426			HPF	cal							Yes
0067	UNe Slave Cal	11:40	426			HPF	cal							Yes
0068	UNe Slave Cal	11:48	426			HPF	cal							Yes
0069	UNe Slave Cal	11:56	426			HPF	cal							Yes
0070	UNe Slave Cal	12:04	426			HPF	cal							Yes
0071	UNe Slave Cal	12:12	426			HPF	cal							Yes
lrs20009900_01	bias	21:59	0			LRS2	cal							Yes
virus0009900_01	flat_Qth	22:00	20			VIRUS	cal							Yes
virus0009901_01	bias	22:01	0			VIRUS	cal							Yes
lrs20009901_01	flat_ldls_long_B	22:02	20			LRS2	cal							Yes
virus0009902_01	dark	22:03	15			VIRUS	cal							Yes
lrs20009902_01	Cd-A_B	22:04	29			LRS2	cal							Yes
lrs20009903_01	FeAr_R	22:05	15			LRS2	cal							Yes
lrs20009904_01	Hg_B	22:07	15			LRS2	cal							Yes
0088	LFC Cal	22:09	106.5			HPF	cal							Yes
0089	Dark	22:14	319.5			HPF	cal							Yes
0090	Quartz FCU	22:20	74.5			HPF	cal							Yes
0091	Quartz FCU	22:22	74.5			HPF	cal							Yes
0092	Quartz FCU	22:24	74.5			HPF	cal							Yes
0093	Quartz FCU	22:25	74.5			HPF	cal							Yes
0094	Quartz FCU	22:27	74.5			HPF	cal							Yes
0095	Quartz FCU	22:29	74.5			HPF	cal							Yes
0096	Quartz FCU	22:31	74.5			HPF	cal							Yes
0097	Alpha Bright Cal	22:33	85.2			HPF	cal							Yes
0098	Alpha Bright Cal	22:35	85.2			HPF	cal							Yes
0099	Alpha Bright Cal	22:37	85.2			HPF	cal							Yes
0100	Alpha Bright Cal	22:39	85.2			HPF	cal							Yes
0101	LFC FCU	22:42	106.5			HPF	cal							Yes
0102	LFC FCU	22:44	106.5			HPF	cal							Yes
0103	LFC Cal	22:47	106.5			HPF	cal							Yes
0104	LFC Cal	22:49	106.5			HPF	cal							Yes
0105	Etalon Cal	22:52	159.8			HPF	cal							Yes
0106	UNe Slave Cal	22:55	426			HPF	cal							Yes
lrs20000019_01	flat_Qth_R	22:56	15			LRS2	cal							Yes
lrs20000019_02	flat_Qth_R	22:57	15			LRS2	cal							Yes
lrs20000019_03	flat_Qth_R	22:59	15			LRS2	cal							Yes
lrs20000019_04	flat_Qth_R	23:00	15			LRS2	cal							Yes
lrs20000019_05	flat_Qth_R	23:01	15			LRS2	cal							Yes
lrs20000020_01	flat_ldls_long_B	23:02	20			LRS2	cal							Yes
0107	UNe Slave Cal	23:03	426			HPF	cal							Yes
lrs20000020_02	flat_ldls_long_B	23:04	20			LRS2	cal							Yes
lrs20000020_03	flat_ldls_long_B	23:05	20			LRS2	cal							Yes
lrs20000021_01	Cd-A_B	23:06	29			LRS2	cal							Yes
lrs20000021_02	Cd-A_B	23:08	29			LRS2	cal							Yes
lrs20000021_03	Cd-A_B	23:09	29			LRS2	cal							Yes
0108	UNe Slave Cal	23:11	426			HPF	cal							Yes
lrs20000022_01	FeAr_R	23:11	15			LRS2	cal							Yes
lrs20000022_02	FeAr_R	23:12	15			LRS2	cal							Yes
lrs20000022_03	FeAr_R	23:13	15			LRS2	cal							Yes
lrs20000023_01	Hg_R	23:15	20			LRS2	cal							Yes
lrs20000023_02	Hg_R	23:16	20			LRS2	cal							Yes
lrs20000023_03	Hg_R	23:17	20			LRS2	cal							Yes
0109	UNe Slave Cal	23:19	426			HPF	cal							Yes
lrs20000024_01	Hg_B	23:19	15			LRS2	cal							Yes
lrs20000024_02	Hg_B	23:20	15			LRS2	cal							Yes
lrs20000024_03	Hg_B	23:21	15			LRS2	cal							Yes
0110	UNe Slave Cal	23:27	426			HPF	cal							Yes
virus0000023_01	flat_ldls_long	23:28	15			VIRUS	cal							Yes
virus0000023_02	flat_ldls_long	23:29	15			VIRUS	cal							Yes
virus0000023_03	flat_ldls_long	23:31	15			VIRUS	cal							Yes
virus0000024_01	Cd-A	23:32	15			VIRUS	cal							Yes
virus0000024_02	Cd-A	23:33	15			VIRUS	cal							Yes
0111	UNe Slave Cal	23:34	426			HPF	cal							Yes
virus0000024_03	Cd-A	23:35	15			VIRUS	cal							Yes
virus0000025_01	Hg	23:36	15			VIRUS	cal							Yes
virus0000025_02	Hg	23:38	15			VIRUS	cal							Yes
virus0000025_03	Hg	23:39	15			VIRUS	cal							Yes
lrs20000025_01	bias	23:41	0			LRS2	cal							Yes
virus0000026_01	bias	23:41	0			VIRUS	cal							Yes
lrs20000025_02	bias	23:41	0			LRS2	cal							Yes
virus0000026_02	bias	23:42	0			VIRUS	cal							Yes
lrs20000025_03	bias	23:42	0			LRS2	cal							Yes
virus0000026_03	bias	23:42	0			VIRUS	cal							Yes
lrs20000025_04	bias	23:43	0			LRS2	cal							Yes
virus0000026_04	bias	23:43	0			VIRUS	cal							Yes
lrs20000025_05	bias	23:44	0			LRS2	cal							Yes
virus0000026_05	bias	23:44	0			VIRUS	cal							Yes
lrs20000025_06	bias	23:45	0			LRS2	cal							Yes
virus0000026_06	bias	23:45	0			VIRUS	cal							Yes
lrs20000025_07	bias	23:46	0			LRS2	cal							Yes
virus0000026_07	bias	23:46	0			VIRUS	cal							Yes
lrs20000025_08	bias	23:46	0			LRS2	cal							Yes
virus0000026_08	bias	23:47	0			VIRUS	cal							Yes
lrs20000025_09	bias	23:47	0			LRS2	cal							Yes
virus0000026_09	bias	23:48	0			VIRUS	cal							Yes
lrs20000025_10	bias	23:48	0			LRS2	cal							Yes
virus0000026_10	bias	23:49	0			VIRUS	cal							Yes
lrs20000025_11	bias	23:49	0			LRS2	cal							Yes
virus0000026_11	bias	23:49	0			VIRUS	cal							Yes
lrs20000026_01	dark	23:50	360			LRS2	cal							Yes
virus0000027_01	dark	23:50	360			VIRUS	cal							Yes
lrs20000026_02	dark	23:57	360			LRS2	cal							Yes
virus0000027_02	dark	23:57	360			VIRUS	cal							Yes