HET Night Report Reader

Civil Date	Ephemerides
2026-01-28	Sunset			Sunrise			Moon
	Set	12°	18°	18°	12°	Rise	Rise	Set
	00:36	01:23	01:51	12:26	12:54	13:42	-	10:58
Night Length	10:35		Sunset Temperature

On-Duty Personnel
Resident Astronomer	Telescope Operator
Sergey Rostopchin	Amy Westfall

Overlaps		none

Other Personnel	none

Guests	none

Open/Close Log
Open time	Outdoor temp	Truss temp	Close time	Reason	Time open
00:34			12:29	twilight	11:55
Total Time Open					11:55

Program	Night Priority	Science
01:51	Idle due to weather (clouds)
06:42	Science
09:58	Idle due to weather (clouds)
11:10	Science
11:40	Idle due to weather (clouds)

Stack Data
Start	Stop	ee50	ee80	Hefi Focus	Mars Focus	Outside Temp	Dome Temp	Truss Temp	Wind Direction	Wind Speed	Stack Type
01:01	01:58	0.50	0.81	-20	+1243	6.5	7.4	7.9	193	17	First of Night
12:20	12:27	0.63	1.13	30	+341	7.2	7.6	7.8	290	29	Post-Observing

Problem Reports
PR Number	Times	Time Lost	Description	Response
6627	12:10-12:15	00:05	Random false dust closure warnings -- 1.0 micron dust spiked from 4K to 327K, then back down to 4K within 5 minutes.

TO Comments	Thin or patchy clouds for much of night.

RA Comments	none

Observations
File	Target/QID	Exp Start	Exposure	Overhead	Program	Instrument Configuration	Data Type	IQ	Dimm	SkySBrt	Skytrans	SNR	Comments	Charge
virus0000032_03	Hg	00:00	15			VIRUS	cal							Yes
lrs20000001_01	dark	00:02	360			LRS2	cal							Yes
virus0000001_01	dark	00:02	360			VIRUS	cal							Yes
lrs20000001_02	dark	00:09	360			LRS2	cal							Yes
virus0000001_02	dark	00:09	360			VIRUS	cal							Yes
lrs20000001_03	dark	00:15	360			LRS2	cal							Yes
virus0000001_03	dark	00:16	360			VIRUS	cal							Yes
0001	twilight	00:33	298.2			HPF	cal					344		Yes
lrs20000002_01	skyflat	00:40	7			LRS2	cal							Yes
lrs20000003_01	skyflat	00:41	10			LRS2	cal							Yes
lrs20000004_01	skyflat	00:43	13			LRS2	cal							Yes
lrs20000005_01	skyflat	00:44	16			LRS2	cal							Yes
lrs20000006_01	skyflat	00:45	22			LRS2	cal							Yes
lrs20000007_01	skyflat	00:46	30			LRS2	cal							Yes
virus0000002_01	skyflat	00:49	7			VIRUS	cal							Yes
virus0000003_01	skyflat	00:50	10			VIRUS	cal							Yes
virus0000004_01	skyflat	00:52	14			VIRUS	cal							Yes
virus0000005_01	skyflat	00:53	18			VIRUS	cal							Yes
virus0000006_01	skyflat	00:55	26			VIRUS	cal							Yes
virus0006100_01	dark	00:57	10			VIRUS	cal							Yes
virus0000007_01	bias	00:58	0			VIRUS	cal							Yes
virus0006101_01	dark	01:09	10			VIRUS	cal							Yes
virus0000008_01	bias	01:18	0			VIRUS	cal							Yes
lrs20000008_01	bias	01:20	0			LRS2	cal							Yes
virus0000009_01	bias	01:20	0			VIRUS	cal							Yes
lrs20000008_02	bias	01:20	0			LRS2	cal							Yes
virus0000009_02	bias	01:20	0			VIRUS	cal							Yes
lrs20000008_03	bias	01:21	0			LRS2	cal							Yes
virus0000009_03	bias	01:21	0			VIRUS	cal							Yes
lrs20000008_04	bias	01:22	0			LRS2	cal							Yes
virus0000009_04	bias	01:22	0			VIRUS	cal							Yes
lrs20000008_05	bias	01:23	0			LRS2	cal							Yes
virus0000009_05	bias	01:23	0			VIRUS	cal							Yes
lrs20000008_06	bias	01:24	0			LRS2	cal							Yes
virus0000009_06	bias	01:24	0			VIRUS	cal							Yes
lrs20000008_07	bias	01:25	0			LRS2	cal							Yes
virus0000009_07	bias	01:25	0			VIRUS	cal							Yes
lrs20000008_08	bias	01:25	0			LRS2	cal							Yes
virus0000009_08	bias	01:26	0			VIRUS	cal							Yes
lrs20000008_09	bias	01:26	0			LRS2	cal							Yes
virus0000009_09	bias	01:27	0			VIRUS	cal							Yes
lrs20000008_10	bias	01:27	0			LRS2	cal							Yes
virus0000009_10	bias	01:28	0			VIRUS	cal							Yes
lrs20000008_11	bias	01:28	0			LRS2	cal							Yes
virus0000009_11	bias	01:28	0			VIRUS	cal							Yes
0002	LFC Cal	01:59	106.5			HPF	cal							Yes
0003	LFC Cal	02:52	106.5			HPF	cal							Yes
0004	LFC Cal	02:54	106.5			HPF	cal							Yes
0005	LFC Cal	02:57	106.5			HPF	cal							Yes
0006	LFC Cal	04:37	106.5			HPF	cal							Yes
virus0000010_01	parallel	04:50	2203			VIRUS	sci							Yes
0007	QID 1473	04:51	330.2	6.5	UT26-1-010	HPF	sci	2.69	1.56	16.93	0.46	152	clouds	No
0008	QID 1473	04:57	330.2	1.5	UT26-1-010	HPF	sci	2.42	1.77	16.40	0.31	92		No
0009	LFC Cal	05:04	106.5			HPF	cal							Yes
0010	HR4131_tell_std	06:47	330.2	4.5		HPF	telluric	2.61	1.69	18.48	0.55			Yes
virus0000011_01	parallel	07:01	2083			VIRUS	sci							Yes
0011	QID 1458	07:02	649.6	10.2	UT26-1-010	HPF	sci	2.55	1.67	18.66	0.50	175		P4
0012	QID 1458	07:13	649.6	0.2	UT26-1-010	HPF	sci	2.62	2.22	18.89	0.66	218		P4
0013	QID 1458	07:25	649.6	1.2	UT26-1-010	HPF	sci	2.53	1.78	19.05	0.69	215		P4
0014	LFC Cal	07:37	106.5			HPF	cal							Yes
virus0000012_01	parallel	07:49	2047			VIRUS	sci							Yes
0015	QID 1957	07:50	969.1	13.8	UT26-1-010	HPF	sci	2.27	1.46	17.47	0.76	118		Yes
0016	QID 1957	08:07	969.1	0.8	UT26-1-010	HPF	sci	2.16	1.62	17.50	0.88	106		Yes
0017	LFC Cal	08:25	106.5			HPF	cal							Yes
0018	QID 141	08:32	308.9	8.9	UT26-1-009	HPF	sci	2.41	1.87	19.46	0.90	235		P4
virus0000013_01	parallel	08:32	1060			VIRUS	sci							Yes
0019	QID 141	08:38	308.9	0.9	UT26-1-009	HPF	sci	2.37	1.74	19.40	0.90	238		P4
0020	QID 141	08:44	308.9	0.9	UT26-1-009	HPF	sci	2.39	1.68	19.41	0.92	209		P4
virus0000014_01	parallel	08:58	1060			VIRUS	sci							Yes
0021	QID 2524	08:59	308.9	9.9	UT26-1-007	HPF	sci	2.42	1.73	19.63	0.60	114		Yes
0022	QID 2524	09:05	308.9	0.9	UT26-1-007	HPF	sci	2.41	2.24	19.57	0.57	108		Yes
0023	QID 2524	09:11	308.9	0.9	UT26-1-007	HPF	sci	2.21	2.16	19.44	0.58	106		Yes
virus0000015_01	parallel	09:24	2047			VIRUS	sci							Yes
0024	QID 1410	09:25	969.1	8.8	PSU26-1-002	HPF	sci	1.99		18.98	0.95	237		Yes
0025	QID 1410	09:42	969.1	0.8	PSU26-1-002	HPF	sci	1.88		18.38	0.81	191		Yes
0026	LFC Cal	10:00	106.5			HPF	cal							Yes
0027	QID 2525	10:06	308.9	7.9	UT26-1-007	HPF	sci	1.69		19.17	0.38	164	clouds	No
virus0000016_01	parallel	10:06	1060			VIRUS	sci							Yes
0028	QID 2525	10:12	308.9	0.9	UT26-1-007	HPF	sci	1.64		19.17	0.35	155		No
0029	QID 2525	10:18	308.9	0.9	UT26-1-007	HPF	sci	1.63	1.31	19.28	0.46	169		No
0030	QID 1221	10:36	969.1	6.8	UT26-1-003	HPF	sci	1.78	1.38	19.23	0.71	10	clouds, seeing	No
virus0000017_01	parallel	10:36	2047			VIRUS	sci							Yes
0031	QID 1221	10:53	969.1	1.8	UT26-1-003	HPF	sci	1.71	1.19	19.65	0.76	8		No
0032	LFC Cal	11:17	106.5			HPF	cal							Yes
lrs20000009_01	parallel	11:17	420			LRS2	sci							Yes
virus0000018_01	QID 379	11:17	420	7.0	UT26-1-008	VIRUS	sci	1.93	1.13	21.92	0.79			Yes
0033	LFC Cal	11:19	106.5			HPF	cal							Yes
0034	LFC Cal	11:22	106.5			HPF	cal							Yes
lrs20000009_02	parallel	11:25	420			LRS2	sci							Yes
virus0000018_02	QID 379	11:25	420	1.0	UT26-1-008	VIRUS	sci	1.93	1.17	22.00	0.78			Yes
lrs20000009_03	parallel	11:33	420			LRS2	sci							Yes
virus0000018_03	QID 379	11:33	420	1.0	UT26-1-008	VIRUS	sci	1.90	1.37	22.08	0.78			Yes
0035	QID 1838	11:53	32	13.5	PSU26-1-011	HPF	sci	1.64	0.89	20.10	0.74	367		P4
lrs20000010_01	parallel	11:58	360			LRS2	sci							Yes
virus0000019_01	QID 1985	11:58	360	4.0	UT26-1-008	VIRUS	sci	1.93	1.00	21.76	0.43		clouds	No
0036	LFC Cal	11:59	106.5			HPF	cal							Yes
0037	LFC Cal	12:01	106.5			HPF	cal							Yes
lrs20000010_02	parallel	12:05	360			LRS2	sci							Yes
virus0000019_02	QID 1985	12:06	360	2.0	UT26-1-008	VIRUS	sci	1.85	1.04	21.70	0.15			No
lrs20000010_03	parallel	12:13	360			LRS2	sci							Yes
virus0000019_03	QID 1985	12:13	360	1.0	UT26-1-008	VIRUS	sci	1.94	1.10	21.67	0.05			No
lrs20000011_01	bias	12:23	0			LRS2	cal							Yes
virus0000020_01	bias	12:23	0			VIRUS	cal							Yes
virus0000021_01	Cd-A	12:28	15		ENG26-1-002	VIRUS	cal							Yes
virus0000022_01	Hg	12:29	15		ENG26-1-002	VIRUS	cal							Yes
0038	Dark	12:37	319.5			HPF	cal							Yes
0039	Quartz FCU	12:48	74.5			HPF	cal							Yes
0040	Quartz FCU	12:50	74.5			HPF	cal							Yes
0041	Quartz FCU	12:52	74.5			HPF	cal							Yes
0042	Quartz FCU	12:54	74.5			HPF	cal							Yes
0043	Quartz FCU	12:55	74.5			HPF	cal							Yes
0044	Quartz FCU	12:57	74.5			HPF	cal							Yes
0045	Quartz FCU	12:59	74.5			HPF	cal							Yes
0046	Alpha Bright Cal	13:01	85.2			HPF	cal							Yes
0047	Alpha Bright Cal	13:03	85.2			HPF	cal							Yes
0048	Alpha Bright Cal	13:05	85.2			HPF	cal							Yes
0049	Alpha Bright Cal	13:07	85.2			HPF	cal							Yes
0050	LFC FCU	13:10	106.5			HPF	cal							Yes
0051	LFC FCU	13:12	106.5			HPF	cal							Yes
0052	LFC FCU	13:14	106.5			HPF	cal							Yes
0053	LFC FCU	13:17	106.5			HPF	cal							Yes
0054	LFC FCU	13:19	106.5			HPF	cal							Yes
0055	LFC FCU	13:21	106.5			HPF	cal							Yes
0056	LFC Cal	13:24	106.5			HPF	cal							Yes
0057	LFC Cal	13:27	106.5			HPF	cal							Yes
0058	Etalon Cal	13:34	159.8			HPF	cal							Yes
0059	Etalon Cal	13:38	159.8			HPF	cal							Yes
0060	Etalon Cal	13:41	159.8			HPF	cal							Yes
0061	Etalon Cal	13:44	159.8			HPF	cal							Yes
0062	UNe Slave Cal	13:48	426			HPF	cal							Yes
0063	UNe Slave Cal	13:55	426			HPF	cal							Yes
0064	UNe Slave Cal	14:03	426			HPF	cal							Yes
0065	UNe Slave Cal	14:11	426			HPF	cal							Yes
0066	UNe Slave Cal	14:19	426			HPF	cal							Yes
0067	UNe Slave Cal	14:26	426			HPF	cal							Yes
0085	LFC Cal	22:15	106.5			HPF	cal							Yes
lrs20009900_01	bias	22:23	0			LRS2	cal							Yes
virus0009900_01	flat_Qth	22:24	20			VIRUS	cal							Yes
virus0009901_01	bias	22:25	0			VIRUS	cal							Yes
lrs20009901_01	flat_ldls_long_B	22:26	20			LRS2	cal							Yes
virus0009902_01	dark	22:27	15			VIRUS	cal							Yes
lrs20009902_01	Cd-A_B	22:28	29			LRS2	cal							Yes
lrs20009903_01	FeAr_R	22:30	15			LRS2	cal							Yes
lrs20009904_01	Hg_B	22:31	15			LRS2	cal							Yes
0086	Dark	22:36	319.5			HPF	cal							Yes
0087	Quartz FCU	22:43	74.5			HPF	cal							Yes
0088	Quartz FCU	22:44	74.5			HPF	cal							Yes
0089	Quartz FCU	22:46	74.5			HPF	cal							Yes
0090	Quartz FCU	22:48	74.5			HPF	cal							Yes
0091	Quartz FCU	22:50	74.5			HPF	cal							Yes
0092	Quartz FCU	22:52	74.5			HPF	cal							Yes
0093	Quartz FCU	22:53	74.5			HPF	cal							Yes
0094	Alpha Bright Cal	22:56	85.2			HPF	cal							Yes
0095	Alpha Bright Cal	22:58	85.2			HPF	cal							Yes
0096	Alpha Bright Cal	23:00	85.2			HPF	cal							Yes
0097	Alpha Bright Cal	23:01	85.2			HPF	cal							Yes
0098	LFC FCU	23:04	106.5			HPF	cal							Yes
0099	LFC FCU	23:06	106.5			HPF	cal							Yes
0100	LFC Cal	23:09	106.5			HPF	cal							Yes
0101	LFC Cal	23:12	106.5			HPF	cal							Yes
0102	Etalon Cal	23:14	159.8			HPF	cal							Yes
0103	UNe Slave Cal	23:18	426			HPF	cal							Yes
lrs20000023_01	flat_Qth_R	23:18	15			LRS2	cal							Yes
lrs20000023_02	flat_Qth_R	23:19	15			LRS2	cal							Yes
lrs20000023_03	flat_Qth_R	23:21	15			LRS2	cal							Yes
lrs20000023_04	flat_Qth_R	23:22	15			LRS2	cal							Yes
lrs20000023_05	flat_Qth_R	23:23	15			LRS2	cal							Yes
lrs20000024_01	flat_ldls_long_B	23:24	20			LRS2	cal							Yes
0104	UNe Slave Cal	23:26	426			HPF	cal							Yes
lrs20000024_02	flat_ldls_long_B	23:26	20			LRS2	cal							Yes
lrs20000024_03	flat_ldls_long_B	23:27	20			LRS2	cal							Yes
lrs20000025_01	Cd-A_B	23:28	29			LRS2	cal							Yes
lrs20000025_02	Cd-A_B	23:30	29			LRS2	cal							Yes
lrs20000025_03	Cd-A_B	23:31	29			LRS2	cal							Yes
lrs20000026_01	FeAr_R	23:33	15			LRS2	cal							Yes
0105	UNe Slave Cal	23:34	426			HPF	cal							Yes
lrs20000026_02	FeAr_R	23:34	15			LRS2	cal							Yes
lrs20000026_03	FeAr_R	23:35	15			LRS2	cal							Yes
lrs20000027_01	Hg_R	23:36	20			LRS2	cal							Yes
lrs20000027_02	Hg_R	23:38	20			LRS2	cal							Yes
lrs20000027_03	Hg_R	23:39	20			LRS2	cal							Yes
lrs20000028_01	Hg_B	23:40	15			LRS2	cal							Yes
0106	UNe Slave Cal	23:41	426			HPF	cal							Yes
lrs20000028_02	Hg_B	23:42	15			LRS2	cal							Yes
lrs20000028_03	Hg_B	23:43	15			LRS2	cal							Yes
0107	UNe Slave Cal	23:49	426			HPF	cal							Yes
virus0000030_01	flat_ldls_long	23:49	15			VIRUS	cal							Yes
virus0000030_02	flat_ldls_long	23:51	15			VIRUS	cal							Yes
virus0000030_03	flat_ldls_long	23:52	15			VIRUS	cal							Yes
virus0000031_01	Cd-A	23:54	15			VIRUS	cal							Yes
virus0000031_02	Cd-A	23:55	15			VIRUS	cal							Yes
virus0000031_03	Cd-A	23:56	15			VIRUS	cal							Yes
0108	UNe Slave Cal	23:57	426			HPF	cal							Yes
virus0000032_01	Hg	23:58	15			VIRUS	cal							Yes
virus0000032_02	Hg	23:59	15			VIRUS	cal							Yes