HET Night Report Reader

Civil Date	Ephemerides
2026-02-21	Sunset			Sunrise			Moon
	Set	12°	18°	18°	12°	Rise	Rise	Set
	00:56	01:41	02:09	12:09	12:37	13:23	-	05:22
Night Length	10:00		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
00:47	5.1	7.9	12:31	twilight	11:44
Total Time Open					11:44

Program	Night Priority	Science
02:09	Science
06:09	Idle due to weather (highly variable seeing)
06:33	Science
09:33	Idle due to weather (Clouds)
10:45	Science

Stack Data
Start	Stop	ee50	ee80	Hefi Focus	Mars Focus	Outside Temp	Dome Temp	Truss Temp	Wind Direction	Wind Speed	Stack Type
01:21	01:50	0.82	1.29	100	-1200	4.3	5.5	6.2	51	12	First of Night
04:47	05:19					1.5	2.5	2.9	69	11	Stack/Re-stack
06:09	07:07	0.64	1.04	50	-123	0.2	1.1	1.4	72	9	Stack/Re-stack
12:24	12:30	1.11	1.63	-347	-311	0.9	1.3	1.2	87	14	Post-Observing

Problem Reports					no PRs

TO Comments	Mostly clear and mostly calm night with some rocky seeing.

RA Comments	none

Observations
File	Target/QID	Exp Start	Exposure	Overhead	Program	Instrument Configuration	Data Type	IQ	Dimm	SkySBrt	Skytrans	SNR	Comments	Charge
lrs20000020_02	Cd-A_B	00:00	29			LRS2	cal							Yes
lrs20000020_03	Cd-A_B	00:01	29			LRS2	cal							Yes
lrs20000021_01	FeAr_R	00:03	15			LRS2	cal							Yes
0001	UNe Slave Cal	00:04	426			HPF	cal							Yes
lrs20000021_02	FeAr_R	00:04	15			LRS2	cal							Yes
lrs20000021_03	FeAr_R	00:05	15			LRS2	cal							Yes
lrs20000022_01	Hg_R	00:06	20			LRS2	cal							Yes
lrs20000022_02	Hg_R	00:08	20			LRS2	cal							Yes
lrs20000022_03	Hg_R	00:09	20			LRS2	cal							Yes
lrs20000023_01	Hg_B	00:10	15			LRS2	cal							Yes
lrs20000023_02	Hg_B	00:11	15			LRS2	cal							Yes
0002	UNe Slave Cal	00:12	426			HPF	cal							Yes
lrs20000023_03	Hg_B	00:13	15			LRS2	cal							Yes
virus0000001_01	flat_ldls_long	00:19	15			VIRUS	cal							Yes
0003	UNe Slave Cal	00:20	426			HPF	cal							Yes
virus0000001_02	flat_ldls_long	00:21	15			VIRUS	cal							Yes
virus0000001_03	flat_ldls_long	00:22	15			VIRUS	cal							Yes
virus0000002_01	Cd-A	00:24	15			VIRUS	cal							Yes
virus0000002_02	Cd-A	00:25	15			VIRUS	cal							Yes
virus0000002_03	Cd-A	00:26	15			VIRUS	cal							Yes
0004	UNe Slave Cal	00:28	426			HPF	cal							Yes
virus0000003_01	Hg	00:28	15			VIRUS	cal							Yes
virus0000003_02	Hg	00:29	15			VIRUS	cal							Yes
virus0000003_03	Hg	00:31	15			VIRUS	cal							Yes
lrs20000001_01	bias	00:32	0			LRS2	cal							Yes
virus0000004_01	bias	00:32	0			VIRUS	cal							Yes
lrs20000001_02	bias	00:33	0			LRS2	cal							Yes
lrs20000001_03	bias	00:33	0			LRS2	cal							Yes
virus0000004_02	bias	00:33	0			VIRUS	cal							Yes
virus0000004_03	bias	00:34	0			VIRUS	cal							Yes
lrs20000001_04	bias	00:34	0			LRS2	cal							Yes
virus0000004_04	bias	00:35	0			VIRUS	cal							Yes
lrs20000001_05	bias	00:35	0			LRS2	cal							Yes
virus0000004_05	bias	00:35	0			VIRUS	cal							Yes
lrs20000001_06	bias	00:36	0			LRS2	cal							Yes
virus0000004_06	bias	00:36	0			VIRUS	cal							Yes
lrs20000001_07	bias	00:37	0			LRS2	cal							Yes
virus0000004_07	bias	00:37	0			VIRUS	cal							Yes
lrs20000001_08	bias	00:38	0			LRS2	cal							Yes
virus0000004_08	bias	00:38	0			VIRUS	cal							Yes
lrs20000001_09	bias	00:39	0			LRS2	cal							Yes
virus0000004_09	bias	00:39	0			VIRUS	cal							Yes
lrs20000001_10	bias	00:39	0			LRS2	cal							Yes
virus0000004_10	bias	00:40	0			VIRUS	cal							Yes
lrs20000001_11	bias	00:40	0			LRS2	cal							Yes
virus0000004_11	bias	00:41	0			VIRUS	cal							Yes
0005	twilight	00:53	298.2			HPF	cal					325		Yes
lrs20000002_01	skyflat	01:00	7			LRS2	cal							Yes
lrs20000003_01	skyflat	01:01	10			LRS2	cal							Yes
lrs20000004_01	skyflat	01:02	13			LRS2	cal							Yes
lrs20000005_01	skyflat	01:03	16			LRS2	cal							Yes
lrs20000006_01	skyflat	01:04	22			LRS2	cal							Yes
lrs20000007_01	skyflat	01:06	30			LRS2	cal							Yes
virus0000005_01	skyflat	01:08	7			VIRUS	cal							Yes
virus0000006_01	skyflat	01:10	10			VIRUS	cal							Yes
virus0000007_01	skyflat	01:11	14			VIRUS	cal							Yes
virus0000008_01	skyflat	01:12	18			VIRUS	cal							Yes
virus0000009_01	skyflat	01:14	26			VIRUS	cal							Yes
lrs20000008_01	dark	01:18	360			LRS2	cal							Yes
virus0000010_01	dark	01:18	360			VIRUS	cal							Yes
lrs20000008_02	dark	01:25	360			LRS2	cal							Yes
virus0000010_02	dark	01:25	360			VIRUS	cal							Yes
lrs20000008_03	dark	01:32	360			LRS2	cal							Yes
virus0000010_03	dark	01:32	360			VIRUS	cal							Yes
0006	QID 1307	01:58	969.1	7.8	PSU26-1-023	HPF	sci	1.88	1.43	19.64	0.93	122		Yes
virus0000011_01	parallel	01:58	2047			VIRUS	sci							Yes
0007	QID 1307	02:15	969.1	0.8	PSU26-1-023	HPF	sci	1.90	1.29	19.63	0.73	88		Yes
0009	LFC Cal	02:33	106.5			HPF	cal							Yes
0010	QID 1599	02:38	617.7	7.7	UT26-1-007	HPF	sci	1.98	1.31	19.98	0.66	14		Yes
virus0000012_01	parallel	02:38	1984			VIRUS	sci							Yes
0011	QID 1599	02:49	617.7	0.7	UT26-1-007	HPF	sci	1.87	1.05	20.05	0.75	17		Yes
0012	QID 1599	03:01	617.7	0.7	UT26-1-007	HPF	sci	1.92	1.18	20.18	0.76	18		Yes
0013	LFC Cal	03:12	106.5			HPF	cal							Yes
0014	QID 2755	03:18	532.5	7.1	UT26-1-014	HPF	sci	1.98	1.14	20.03	1.04	412		Yes
virus0000013_01	parallel	03:18	583			VIRUS	sci							Yes
0015	LFC Cal	03:28	106.5			HPF	cal							Yes
virus0000014_01	parallel	03:33	583			VIRUS	sci							Yes
0016	QID 2756	03:34	532.5	6.1	UT26-1-014	HPF	sci	2.29	1.52	20.19	0.97	379		P4
0017	LFC Cal	03:44	106.5			HPF	cal							Yes
0018	QID 2545	03:51	308.9	8.9	UT26-1-007	HPF	sci	1.85	1.36	20.08	0.96	123		Yes
virus0000015_01	parallel	03:51	1060			VIRUS	sci							Yes
0019	QID 2545	03:57	308.9	0.9	UT26-1-007	HPF	sci	1.95	1.31	20.06	0.96	126		Yes
0020	QID 2545	04:03	308.9	0.9	UT26-1-007	HPF	sci	2.07	1.38	20.03	0.95	129		Yes
0021	QID 2775	04:14	969.1	6.8	UT26-1-014	HPF	sci	2.23	1.28	20.33	0.91	341		Yes
virus0000016_01	parallel	04:14	1023			VIRUS	sci							Yes
0022	LFC Cal	04:32	106.5			HPF	cal							Yes
0023	QID 2757	04:38	532.5	7.1	UT26-1-014	HPF	sci	2.49	1.33	20.25	0.88	346		P4
virus0000017_01	parallel	04:38	583			VIRUS	sci							Yes
0024	LFC Cal	04:48	106.5			HPF	cal							Yes
0025	LFC Cal	05:23	106.5			HPF	cal							Yes
lrs20000009_01	parallel	05:23	360			LRS2	sci							Yes
virus0000018_01	QID 352	05:23	360	4.0	UT26-1-008	VIRUS	sci	2.65		22.09	0.65		variable seeing	Yes
0026	LFC Cal	05:25	106.5			HPF	cal							Yes
lrs20000009_02	parallel	05:30	360			LRS2	sci							Yes
virus0000018_02	QID 352	05:30	360	1.0	UT26-1-008	VIRUS	sci	2.23		22.11	0.65			Yes
lrs20000009_03	parallel	05:37	360			LRS2	sci							Yes
virus0000018_03	QID 352	05:37	360	1.0	UT26-1-008	VIRUS	sci	2.07		22.14	0.69			Yes
0027	LFC Cal	05:49	106.5			HPF	cal							Yes
lrs20000010_01	parallel	05:49	360			LRS2	sci							Yes
virus0000019_01	QID 1986	05:49	360	6.0	UT26-1-008	VIRUS	sci	2.25	1.44	21.76	0.75			Yes
0028	LFC Cal	05:51	106.5			HPF	cal							Yes
lrs20000010_02	parallel	05:56	360			LRS2	sci							Yes
virus0000019_02	QID 1986	05:56	360	1.0	UT26-1-008	VIRUS	sci	2.03	1.18	21.69	0.79			Yes
lrs20000010_03	parallel	06:03	360			LRS2	sci							Yes
virus0000019_03	QID 1986	06:03	360	1.0	UT26-1-008	VIRUS	sci	2.10	1.69	21.72	0.81			Yes
lrs20000011_01	parallel	06:12	360			LRS2	sci							Yes
virus0000020_01	QID 1986	06:12	360	3.0	UT26-1-008	VIRUS	sci	2.52	1.53	21.73	0.78		highly variable seeing	No
0029	LFC Cal	06:13	106.5			HPF	cal							Yes
0030	LFC Cal	06:15	106.5			HPF	cal							Yes
lrs20000011_02	parallel	06:20	360			LRS2	sci							Yes
virus0000020_02	QID 1986	06:20	360	2.0	UT26-1-008	VIRUS	sci	2.31	1.87	21.70	0.77			No
lrs20000011_03	parallel	06:27	360			LRS2	sci							Yes
virus0000020_03	QID 1986	06:27	360	1.0	UT26-1-008	VIRUS	sci	2.08	1.35	21.68	0.90			No
lrs20000012_01	HD116405_056_E	07:11	15	3.8		LRS2	spec	1.83	1.17	22.07	0.64			Yes
lrs20000013_01	HD116405_066_E	07:14	15	2.8		LRS2	spec	2.07	1.12	21.23	0.68			Yes
virus0000021_01	parallel	07:20	8977			VIRUS	sci							Yes
0031	QID 2797	07:21	308.9	6.9	UT26-1-009	HPF	sci	1.41	0.88	20.09	1.18	79	clouds at the end	Yes
0032	QID 2797	07:27	308.9	0.9	UT26-1-009	HPF	sci	1.34	0.82	20.14	1.13	86		Yes
0033	QID 2797	07:32	308.9	-0.1	UT26-1-009	HPF	sci	1.41	0.89	20.21	1.06	84		Yes
0034	QID 2797	07:38	308.9	0.9	UT26-1-009	HPF	sci	1.42	1.05	20.26	1.02	89		Yes
0035	QID 2797	07:44	308.9	0.9	UT26-1-009	HPF	sci	1.44	0.85	20.28	0.97	87		Yes
0036	QID 2797	07:50	308.9	0.9	UT26-1-009	HPF	sci	1.40		20.34	0.96	92		Yes
0037	QID 2797	07:55	308.9	0.9	UT26-1-009	HPF	sci	1.44		20.39	0.96	93		Yes
0038	QID 2797	08:01	308.9	-0.1	UT26-1-009	HPF	sci	1.46		20.42	0.96	98		Yes
0039	QID 2797	08:07	308.9	0.9	UT26-1-009	HPF	sci	1.46		20.45	0.95	99		Yes
0040	QID 2797	08:13	308.9	0.9	UT26-1-009	HPF	sci	1.47		20.46	0.96	101		Yes
0041	QID 2797	08:18	308.9	0.9	UT26-1-009	HPF	sci	1.53	1.03	20.45	0.97	100		Yes
0042	QID 2797	08:24	308.9	-0.1	UT26-1-009	HPF	sci	1.53	0.94	20.44	0.97	101		Yes
0043	QID 2797	08:30	308.9	0.9	UT26-1-009	HPF	sci	1.62	1.06	20.47	0.99	99		Yes
0044	QID 2797	08:36	308.9	0.9	UT26-1-009	HPF	sci	1.78	1.45	20.49	0.98	87		Yes
0045	QID 2797	08:42	308.9	0.9	UT26-1-009	HPF	sci	1.72	1.17	20.48	0.96	87		Yes
0046	QID 2797	08:47	308.9	0.9	UT26-1-009	HPF	sci	1.78	1.15	20.37	0.84	69		Yes
0047	QID 2797	08:53	308.9	-0.1	UT26-1-009	HPF	sci	1.56	1.30	20.42	0.76	47		Yes
0048	QID 2797	08:59	308.9	0.9	UT26-1-009	HPF	sci	1.52	1.12	20.35	0.63	68		Yes
0049	QID 2797	09:05	308.9	0.9	UT26-1-009	HPF	sci	1.70	1.39	20.25	0.46	50		Yes
0050	QID 2797	09:10	308.9	0.9	UT26-1-009	HPF	sci	1.68	1.33	20.36	0.46	49		Yes
0051	QID 2797	09:16	308.9	-0.1	UT26-1-009	HPF	sci	1.63	1.45	20.39	0.43	44		Yes
0052	QID 2797	09:22	308.9	0.9	UT26-1-009	HPF	sci	1.64	1.36	20.37	0.35	32		Yes
0053	QID 2797	09:28	308.9	0.9	UT26-1-009	HPF	sci	1.74	1.43	20.40	0.23	28		Yes
0054	LFC Cal	09:41	106.5			HPF	cal							Yes
0055	LFC Cal	09:44	106.5			HPF	cal							Yes
0056	LFC Cal	09:46	106.5			HPF	cal							Yes
virus0000022_01	parallel	10:11	2047			VIRUS	sci							Yes
0057	QID 1886	10:12	969.1	5.8	UT26-1-003	HPF	sci	2.00	1.23	20.24	0.87	21	variable seeing	No
0058	QID 1886	10:29	969.1	0.8	UT26-1-003	HPF	sci	1.81	1.20	20.26	0.92	20		No
virus0000023_01	parallel	10:52	4345			VIRUS	sci							Yes
0059	QID 2798	10:53	308.9	7.9	UT26-1-009	HPF	sci	1.88	1.08	20.51	0.87	78		Yes
0060	QID 2798	10:58	308.9	0.9	UT26-1-009	HPF	sci	1.84	1.27	20.49	0.89	80		Yes
0061	QID 2798	11:04	308.9	-0.1	UT26-1-009	HPF	sci	1.87	1.29	20.41	0.80	74		Yes
0062	QID 2798	11:10	308.9	0.9	UT26-1-009	HPF	sci	1.86	1.15	20.39	0.79	77		Yes
0063	QID 2798	11:16	308.9	0.9	UT26-1-009	HPF	sci	1.90	1.40	20.42	0.90	84		Yes
0064	QID 2798	11:22	308.9	0.9	UT26-1-009	HPF	sci	2.03	1.00	20.43	0.94	84		Yes
0065	QID 2798	11:27	308.9	0.9	UT26-1-009	HPF	sci	1.98	1.08	20.43	0.91	84		Yes
0066	QID 2798	11:33	308.9	-0.1	UT26-1-009	HPF	sci	1.81	0.90	20.44	0.92	92		Yes
0067	QID 2798	11:39	308.9	0.9	UT26-1-009	HPF	sci	1.72	0.98	20.46	0.96	98		Yes
0068	QID 2798	11:45	308.9	0.9	UT26-1-009	HPF	sci	1.74	1.10	20.48	0.92	89		Yes
0069	QID 2798	11:51	308.9	0.9	UT26-1-009	HPF	sci	1.69	1.32	20.52	0.99	89		Yes
0070	QID 2798	11:56	308.9	-0.1	UT26-1-009	HPF	sci	1.64	1.12	20.46	0.99	87		Yes
0071	LFC Cal	12:08	106.5			HPF	cal							Yes
virus0000024_01	parallel	12:08	900			VIRUS	sci							Yes
lrs20000014_01	QID 440	12:08	900	7.0	PSU26-1-014	LRS2-B	sci	2.08	1.23	21.72	0.62			P4
0072	LFC Cal	12:11	106.5			HPF	cal							Yes
0073	LFC Cal	12:13	106.5			HPF	cal							Yes
lrs20000015_01	bias	12:24	0			LRS2	cal							Yes
virus0000025_01	bias	12:25	0			VIRUS	cal							Yes
virus0000026_01	Cd-A	12:28	15		ENG26-1-002	VIRUS	cal							Yes
virus0000027_01	Hg	12:29	15		ENG26-1-002	VIRUS	cal							Yes
0074	Dark	12:38	319.5			HPF	cal							Yes
0075	Quartz FCU	12:50	74.5			HPF	cal							Yes
0076	Quartz FCU	12:52	74.5			HPF	cal							Yes
0077	Quartz FCU	12:53	74.5			HPF	cal							Yes
0078	Quartz FCU	12:55	74.5			HPF	cal							Yes
0079	Quartz FCU	12:57	74.5			HPF	cal							Yes
0080	Quartz FCU	12:59	74.5			HPF	cal							Yes
0081	Quartz FCU	13:01	74.5			HPF	cal							Yes
0082	Alpha Bright Cal	13:03	85.2			HPF	cal							Yes
0083	Alpha Bright Cal	13:05	85.2			HPF	cal							Yes
0084	Alpha Bright Cal	13:07	85.2			HPF	cal							Yes
0085	Alpha Bright Cal	13:09	85.2			HPF	cal							Yes
0086	LFC FCU	13:11	106.5			HPF	cal							Yes
0087	LFC FCU	13:14	106.5			HPF	cal							Yes
0088	LFC FCU	13:16	106.5			HPF	cal							Yes
0089	LFC FCU	13:18	106.5			HPF	cal							Yes
0090	LFC FCU	13:21	106.5			HPF	cal							Yes
0091	LFC FCU	13:23	106.5			HPF	cal							Yes
0092	LFC Cal	13:26	106.5			HPF	cal							Yes
0093	LFC Cal	13:28	106.5			HPF	cal							Yes
0094	Etalon Cal	13:36	159.8			HPF	cal							Yes
0095	Etalon Cal	13:39	159.8			HPF	cal							Yes
0096	Etalon Cal	13:42	159.8			HPF	cal							Yes
0097	Etalon Cal	13:46	159.8			HPF	cal							Yes
0098	UNe Slave Cal	13:49	426			HPF	cal							Yes
0099	UNe Slave Cal	13:57	426			HPF	cal							Yes
0100	UNe Slave Cal	14:05	426			HPF	cal							Yes
0101	UNe Slave Cal	14:12	426			HPF	cal							Yes
0102	UNe Slave Cal	14:20	426			HPF	cal							Yes
0103	UNe Slave Cal	14:28	426			HPF	cal							Yes
virus0008100_01	dark	14:39	20			VIRUS	cal							Yes
virus0008100_02	dark	14:40	20			VIRUS	cal							Yes
virus0008101_01	flat_ldls_long	14:44	15			VIRUS	cal							Yes
virus0008101_02	flat_ldls_long	14:45	15			VIRUS	cal							Yes
virus0008102_01	bias	14:47	0			VIRUS	cal							Yes
virus0008102_02	bias	14:47	0			VIRUS	cal							Yes
virus0008103_01	dark	21:36	20			VIRUS	cal							Yes
virus0008103_02	dark	21:37	20			VIRUS	cal							Yes
virus0008104_01	flat_ldls_long	21:41	15			VIRUS	cal							Yes
virus0008104_02	flat_ldls_long	21:42	15			VIRUS	cal							Yes
virus0008105_01	bias	21:43	0			VIRUS	cal							Yes
virus0008105_02	bias	21:44	0			VIRUS	cal							Yes
0070	LFC Cal	22:48	106.5			HPF	cal							Yes
lrs20009900_01	bias	22:54	0			LRS2	cal							Yes
virus0009900_01	flat_Qth	22:55	20			VIRUS	cal							Yes
virus0009901_01	bias	22:56	0			VIRUS	cal							Yes
lrs20009901_01	flat_ldls_long_B	22:57	20			LRS2	cal							Yes
virus0009902_01	dark	22:58	15			VIRUS	cal							Yes
lrs20009902_01	Cd-A_B	22:59	29			LRS2	cal							Yes
lrs20009903_01	FeAr_R	23:01	15			LRS2	cal							Yes
lrs20009904_01	Hg_B	23:02	15			LRS2	cal							Yes
0071	Dark	23:06	319.5			HPF	cal							Yes
0072	Quartz FCU	23:13	74.5			HPF	cal							Yes
0073	Quartz FCU	23:15	74.5			HPF	cal							Yes
0074	Quartz FCU	23:17	74.5			HPF	cal							Yes
0075	Quartz FCU	23:18	74.5			HPF	cal							Yes
0076	Quartz FCU	23:20	74.5			HPF	cal							Yes
0077	Quartz FCU	23:22	74.5			HPF	cal							Yes
0078	Quartz FCU	23:24	74.5			HPF	cal							Yes
0079	Alpha Bright Cal	23:26	85.2			HPF	cal							Yes
0080	Alpha Bright Cal	23:28	85.2			HPF	cal							Yes
0081	Alpha Bright Cal	23:30	85.2			HPF	cal							Yes
0082	Alpha Bright Cal	23:32	85.2			HPF	cal							Yes
0083	LFC FCU	23:34	106.5			HPF	cal							Yes
0084	LFC FCU	23:37	106.5			HPF	cal							Yes
0085	LFC Cal	23:40	106.5			HPF	cal							Yes
0086	LFC Cal	23:42	106.5			HPF	cal							Yes
0087	Etalon Cal	23:45	159.8			HPF	cal							Yes
lrs20000018_01	flat_Qth_R	23:48	15			LRS2	cal							Yes
0088	UNe Slave Cal	23:49	426			HPF	cal							Yes
lrs20000018_02	flat_Qth_R	23:49	15			LRS2	cal							Yes
lrs20000018_03	flat_Qth_R	23:51	15			LRS2	cal							Yes
lrs20000018_04	flat_Qth_R	23:52	15			LRS2	cal							Yes
lrs20000018_05	flat_Qth_R	23:53	15			LRS2	cal							Yes
lrs20000019_01	flat_ldls_long_B	23:54	20			LRS2	cal							Yes
lrs20000019_02	flat_ldls_long_B	23:56	20			LRS2	cal							Yes
0089	UNe Slave Cal	23:56	426			HPF	cal							Yes
lrs20000019_03	flat_ldls_long_B	23:57	20			LRS2	cal							Yes
lrs20000020_01	Cd-A_B	23:58	29			LRS2	cal							Yes