HET Night Report Reader

Civil Date	Ephemerides
2026-02-23	Sunset			Sunrise			Moon
	Set	12°	18°	18°	12°	Rise	Rise	Set
	00:57	01:42	02:10	12:07	12:35	13:21	-	07:40
Night Length	9:57		Sunset Temperature

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

Overlaps
TO Overlap	RA Overlap
Cassie Crowe	-

Other Personnel	none

Guests	none

Open/Close Log
Open time	Outdoor temp	Truss temp	Close time	Reason	Time open
00:48	10.3	10.7	02:58	engineering	02:10
03:08	7.3	9.3	12:37	twilight	09:29
Total Time Open					11:39

Program	Night Priority	Science
02:10	Science
02:57	Idle due to weather (Stopped for glycol issue inspection)
03:20	Science

Stack Data
Start	Stop	ee50	ee80	Hefi Focus	Mars Focus	Outside Temp	Dome Temp	Truss Temp	Wind Direction	Wind Speed	Stack Type
01:23	02:18	0.83	1.38	140	-3154	8.3	9.7	10.0	222	9	First of Night
12:30	12:36	0.76	1.18	280	-3079	10.5	10.4	10.4	295	19	Post-Observing

Problem Reports					no PRs

TO Comments	Clear and calm night with some poor difficult seeing.

RA Comments	none

Observations
File	Target/QID	Exp Start	Exposure	Overhead	Program	Instrument Configuration	Data Type	IQ	Dimm	SkySBrt	Skytrans	SNR	Comments	Charge
lrs20000023_02	Cd-A_B	00:00	29			LRS2	cal							Yes
lrs20000023_03	Cd-A_B	00:01	29			LRS2	cal							Yes
lrs20000024_01	FeAr_R	00:03	15			LRS2	cal							Yes
0001	UNe Slave Cal	00:03	426			HPF	cal							Yes
lrs20000024_02	FeAr_R	00:04	15			LRS2	cal							Yes
lrs20000024_03	FeAr_R	00:05	15			LRS2	cal							Yes
lrs20000025_01	Hg_R	00:06	20			LRS2	cal							Yes
lrs20000025_02	Hg_R	00:08	20			LRS2	cal							Yes
lrs20000025_03	Hg_R	00:09	20			LRS2	cal							Yes
lrs20000026_01	Hg_B	00:10	15			LRS2	cal							Yes
0002	UNe Slave Cal	00:11	426			HPF	cal							Yes
lrs20000026_02	Hg_B	00:11	15			LRS2	cal							Yes
lrs20000026_03	Hg_B	00:13	15			LRS2	cal							Yes
0003	UNe Slave Cal	00:19	426			HPF	cal							Yes
virus0000001_01	flat_ldls_long	00:19	15			VIRUS	cal							Yes
virus0000001_02	flat_ldls_long	00:20	15			VIRUS	cal							Yes
virus0000001_03	flat_ldls_long	00:22	15			VIRUS	cal							Yes
virus0000002_01	Cd-A	00:23	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	00:27	426			HPF	cal							Yes
virus0000003_01	Hg	00:27	15			VIRUS	cal							Yes
virus0000003_02	Hg	00:29	15			VIRUS	cal							Yes
virus0000003_03	Hg	00:30	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	00:32	0			LRS2	cal							Yes
virus0000004_02	bias	00:33	0			VIRUS	cal							Yes
lrs20000001_03	bias	00:33	0			LRS2	cal							Yes
virus0000004_03	bias	00:34	0			VIRUS	cal							Yes
lrs20000001_04	bias	00:34	0			LRS2	cal							Yes
virus0000004_04	bias	00:34	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	00:38	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	00:54	298.2			HPF	cal					393		Yes
lrs20000002_01	skyflat	01:01	7			LRS2	cal							Yes
lrs20000003_01	skyflat	01:02	10			LRS2	cal							Yes
lrs20000004_01	skyflat	01:04	13			LRS2	cal							Yes
lrs20000005_01	skyflat	01:05	16			LRS2	cal							Yes
lrs20000006_01	skyflat	01:06	22			LRS2	cal							Yes
lrs20000007_01	skyflat	01:07	30			LRS2	cal							Yes
virus0000005_01	skyflat	01:10	7			VIRUS	cal							Yes
virus0000006_01	skyflat	01:11	10			VIRUS	cal							Yes
virus0000007_01	skyflat	01:13	14			VIRUS	cal							Yes
virus0000008_01	skyflat	01:14	18			VIRUS	cal							Yes
virus0000009_01	skyflat	01:15	26			VIRUS	cal							Yes
lrs20000008_01	dark	01:17	360			LRS2	cal							Yes
virus0000010_01	dark	01:17	360			VIRUS	cal							Yes
0006	LFC Cal	01:24	106.5			HPF	cal							Yes
lrs20000008_02	dark	01:24	360			LRS2	cal							Yes
virus0000010_02	dark	01:24	360			VIRUS	cal							Yes
0007	LFC Cal	01:26	106.5			HPF	cal							Yes
0008	LFC Cal	01:29	106.5			HPF	cal							Yes
lrs20000008_03	dark	01:30	360			LRS2	cal							Yes
virus0000010_03	dark	01:31	360			VIRUS	cal							Yes
0009	QID 1274	02:25	915.9	5.7	PSU26-1-006	HPF	sci	1.64	1.09	19.92	0.93	51		P4
virus0000011_01	parallel	02:25	1959			VIRUS	sci							Yes
0010	QID 1274	02:42	915.9	0.7	PSU26-1-006	HPF	sci	1.80	1.05	19.88	1.04	53		P4
virus0000012_01	parallel	03:25	2083			VIRUS	sci							Yes
0011	QID 2636	03:26	649.6	6.2	UT26-1-003	HPF	sci	2.16	1.11	20.02	0.91	91		P4
0012	QID 2636	03:37	649.6	0.2	UT26-1-003	HPF	sci	2.09	1.22	19.93	0.99	90		P4
0013	QID 2636	03:49	649.6	1.2	UT26-1-003	HPF	sci	2.15	1.15	19.72	1.12	72		P4
virus0000013_01	parallel	04:08	1023			VIRUS	sci							Yes
0014	QID 2776	04:09	969.1	8.8	UT26-1-014	HPF	sci	2.34	1.63	19.78	0.93	319		P4
0015	LFC Cal	04:27	106.5			HPF	cal							Yes
0016	LFC Cal	04:32	106.5			HPF	cal							Yes
virus0000014_01	parallel	04:32	300			VIRUS	sci							Yes
lrs20000009_01	QID 2805	04:32	300	7.0	PSU26-1-012	LRS2-B	sci	2.07	1.27	19.80	0.93			Yes
0017	LFC Cal	04:35	106.5			HPF	cal							Yes
virus0000015_01	parallel	04:43	2047			VIRUS	sci							Yes
0018	QID 2551	04:44	969.1	6.8	PSU26-1-019	HPF	sci	2.00	1.23	20.68	0.67	163		Yes
0019	QID 2551	05:01	969.1	0.8	PSU26-1-019	HPF	sci	2.06	1.40	20.77	0.73	161		Yes
0020	LFC Cal	05:19	106.5			HPF	cal							Yes
0021	LFC Cal	05:28	106.5			HPF	cal							Yes
virus0000016_01	parallel	05:28	1500			VIRUS	sci							Yes
lrs20000010_01	QID 2543	05:28	1500	11.0	PSU26-1-012	LRS2-B	sci	2.01	1.75	20.37	1.05			Yes
0022	LFC Cal	05:30	106.5			HPF	cal							Yes
0023	LFC Cal	05:33	106.5			HPF	cal							Yes
virus0000016_02	parallel	05:54	1500			VIRUS	sci							Yes
lrs20000010_02	QID 2543	05:54	1500	1.0	PSU26-1-012	LRS2-B	sci	1.83	1.23	20.39	0.95			Yes
0024	QID 403	06:26	969.1	6.8	UT26-1-003	HPF	sci	2.09	1.27	20.35	0.97	30		Yes
virus0000017_01	parallel	06:26	2047			VIRUS	sci							Yes
0025	QID 403	06:43	969.1	0.8	UT26-1-003	HPF	sci	1.87	1.09	20.40	0.98	31		Yes
virus0000018_01	parallel	07:06	1023			VIRUS	sci							Yes
0026	QID 2767	07:07	969.1	7.8	UT26-1-014	HPF	sci	1.90	1.06	20.79	0.80	367		Yes
0027	LFC Cal	07:25	106.5			HPF	cal							Yes
virus0000019_01	parallel	07:31	1321			VIRUS	sci							Yes
0028	QID 138	07:32	617.7	8.7	UT26-1-009	HPF	sci	1.84	1.12	20.86	0.75	110		P4
0029	QID 138	07:43	617.7	0.7	UT26-1-009	HPF	sci	1.74	0.96	20.87	0.85	120		P4
virus0000020_01	parallel	07:59	1417			VIRUS	sci							Yes
0030	QID 2571	08:00	308.9	6.9	UT26-1-009	HPF	sci	1.66	1.10	20.85	0.90	96		Yes
0031	QID 2571	08:06	308.9	0.9	UT26-1-009	HPF	sci	1.65	1.23	20.85	0.90	101		Yes
0032	QID 2571	08:11	308.9	-0.1	UT26-1-009	HPF	sci	1.65	1.07	20.84	0.90	105		Yes
0033	QID 2571	08:17	308.9	0.9	UT26-1-009	HPF	sci	1.73	1.15	20.84	0.89	103		Yes
0034	LFC Cal	08:28	106.5			HPF	cal							Yes
lrs20000011_01	parallel	08:28	400			LRS2	sci							Yes
virus0000021_01	QID 2557	08:28	400	5.3	UT26-1-013	VIRUS	sci	1.73	1.35	21.72	0.95			Yes
0035	LFC Cal	08:30	106.5			HPF	cal							Yes
0036	LFC Cal	08:32	106.5			HPF	cal							Yes
lrs20000011_02	parallel	08:36	400			LRS2	sci							Yes
virus0000021_02	QID 2557	08:36	400	1.3	UT26-1-013	VIRUS	sci	1.68	1.54	21.75	0.91			Yes
lrs20000011_03	parallel	08:43	400			LRS2	sci							Yes
virus0000021_03	QID 2557	08:43	400	1.3	UT26-1-013	VIRUS	sci	1.65	1.24	21.77	0.89			Yes
0037	LFC Cal	08:54	106.5			HPF	cal							Yes
lrs20000012_01	parallel	08:54	360			LRS2	sci							Yes
virus0000022_01	QID 381	08:54	360	4.0	UT26-1-008	VIRUS	sci	1.80	1.68	21.83	0.90			Yes
0038	LFC Cal	08:56	106.5			HPF	cal							Yes
lrs20000012_02	parallel	09:01	360			LRS2	sci							Yes
virus0000022_02	QID 381	09:01	360	1.0	UT26-1-008	VIRUS	sci	1.81	1.33	21.84	0.89			Yes
lrs20000012_03	parallel	09:08	360			LRS2	sci							Yes
virus0000022_03	QID 381	09:08	360	1.0	UT26-1-008	VIRUS	sci	1.84	1.20	21.86	0.88			Yes
virus0000023_01	parallel	09:22	1000			VIRUS	sci							Yes
lrs20000013_01	QID 419	09:22	1000	8.3	PSU26-1-022	LRS2-R	sci	2.10	1.48	20.72	0.98			P4
0039	LFC Cal	09:23	106.5			HPF	cal							Yes
0040	LFC Cal	09:25	106.5			HPF	cal							Yes
0041	LFC Cal	09:27	106.5			HPF	cal							Yes
virus0000024_01	parallel	09:45	2047			VIRUS	sci							Yes
0042	QID 2800	09:46	969.1	6.8	PSU26-1-024	HPF	sci	1.72	1.56	20.47	0.87	224		Yes
0043	QID 2800	10:03	969.1	0.8	PSU26-1-024	HPF	sci	1.94	1.46	20.43	0.87	220		Yes
virus0000025_01	GRW+705824_034_E	10:26	60	7.0		VIRUS	spec	1.97	1.81	21.86	0.79			Yes
virus0000025_02	GRW+705824_034_E	10:28	60	1.0		VIRUS	spec	1.99	1.60	21.85	0.80			Yes
virus0000025_03	GRW+705824_034_E	10:30	60	1.0		VIRUS	spec	2.11	1.91	21.85	0.79			Yes
lrs20000014_01	parallel	10:36	360			LRS2	sci							Yes
virus0000026_01	QID 1986	10:36	360	5.0	UT26-1-008	VIRUS	sci	2.10	2.00	21.69	0.91			Yes
0044	LFC Cal	10:37	106.5			HPF	cal							Yes
0045	LFC Cal	10:39	106.5			HPF	cal							Yes
lrs20000014_02	parallel	10:43	360			LRS2	sci							Yes
virus0000026_02	QID 1986	10:43	360	1.0	UT26-1-008	VIRUS	sci	1.95	1.42	21.68	0.90			Yes
lrs20000014_03	parallel	10:51	360			LRS2	sci							Yes
virus0000026_03	QID 1986	10:51	360	2.0	UT26-1-008	VIRUS	sci	1.91	1.68	21.66	0.88			Yes
0046	LFC Cal	11:01	106.5			HPF	cal							Yes
lrs20000015_01	parallel	11:01	360			LRS2	sci							Yes
virus0000027_01	QID 406	11:01	360	4.0	UT26-1-008	VIRUS	sci	1.88	1.34	21.80	0.85			Yes
0047	LFC Cal	11:04	106.5			HPF	cal							Yes
lrs20000015_02	parallel	11:08	360			LRS2	sci							Yes
virus0000027_02	QID 406	11:08	360	1.0	UT26-1-008	VIRUS	sci	1.82	1.34	21.77	0.85			Yes
lrs20000015_03	parallel	11:16	360			LRS2	sci							Yes
virus0000027_03	QID 406	11:16	360	2.0	UT26-1-008	VIRUS	sci	1.74	1.29	21.75	0.83			Yes
virus0000028_01	parallel	11:27	1023			VIRUS	sci							Yes
0048	QID 2803	11:28	969.1	5.8	PSU26-1-024	HPF	sci	1.70	1.14	20.24	0.89	129		Yes
0049	QID 1507	11:53	969.1	9.8	UT26-1-010	HPF	sci	1.69	0.98	20.32	0.95	157		Yes
virus0000029_01	parallel	11:53	2047			VIRUS	sci							Yes
0050	QID 1507	12:11	969.1	0.8	UT26-1-010	HPF	sci	1.79	1.50	20.11	0.94	151		Yes
0051	LFC Cal	12:28	106.5			HPF	cal							Yes
lrs20000016_01	bias	12:29	0			LRS2	cal							Yes
virus0000030_01	bias	12:30	0			VIRUS	cal							Yes
virus0000031_01	Cd-A	12:33	15		ENG26-1-002	VIRUS	cal							Yes
virus0000032_01	Hg	12:34	15		ENG26-1-002	VIRUS	cal							Yes
0052	Dark	12:43	319.5			HPF	cal							Yes
0053	Quartz FCU	12:54	74.5			HPF	cal							Yes
0054	Quartz FCU	12:56	74.5			HPF	cal							Yes
0055	Quartz FCU	12:58	74.5			HPF	cal							Yes
0056	Quartz FCU	13:00	74.5			HPF	cal							Yes
0057	Quartz FCU	13:01	74.5			HPF	cal							Yes
0058	Quartz FCU	13:03	74.5			HPF	cal							Yes
0059	Quartz FCU	13:05	74.5			HPF	cal							Yes
0060	Alpha Bright Cal	13:07	85.2			HPF	cal							Yes
0061	Alpha Bright Cal	13:09	85.2			HPF	cal							Yes
0062	Alpha Bright Cal	13:11	85.2			HPF	cal							Yes
0063	Alpha Bright Cal	13:13	85.2			HPF	cal							Yes
0064	LFC FCU	13:16	106.5			HPF	cal							Yes
0065	LFC FCU	13:18	106.5			HPF	cal							Yes
0066	LFC FCU	13:20	106.5			HPF	cal							Yes
0067	LFC FCU	13:23	106.5			HPF	cal							Yes
0068	LFC FCU	13:25	106.5			HPF	cal							Yes
0069	LFC FCU	13:27	106.5			HPF	cal							Yes
0070	LFC Cal	13:31	106.5			HPF	cal							Yes
0071	LFC Cal	13:33	106.5			HPF	cal							Yes
0072	Etalon Cal	13:41	159.8			HPF	cal							Yes
0073	Etalon Cal	13:44	159.8			HPF	cal							Yes
0074	Etalon Cal	13:47	159.8			HPF	cal							Yes
0075	Etalon Cal	13:50	159.8			HPF	cal							Yes
0076	UNe Slave Cal	13:54	426			HPF	cal							Yes
0077	UNe Slave Cal	14:01	426			HPF	cal							Yes
0078	UNe Slave Cal	14:09	426			HPF	cal							Yes
0079	UNe Slave Cal	14:17	426			HPF	cal							Yes
0080	UNe Slave Cal	14:25	426			HPF	cal							Yes
0081	UNe Slave Cal	14:33	426			HPF	cal							Yes
0089	LFC Cal	22:17	106.5			HPF	cal							Yes
lrs20009900_01	bias	22:26	0			LRS2	cal							Yes
virus0009900_01	flat_Qth	22:27	20			VIRUS	cal							Yes
virus0009901_01	bias	22:28	0			VIRUS	cal							Yes
lrs20009901_01	flat_ldls_long_B	22:29	20			LRS2	cal							Yes
virus0009902_01	dark	22:31	15			VIRUS	cal							Yes
lrs20009902_01	Cd-A_B	22:31	29			LRS2	cal							Yes
lrs20009903_01	FeAr_R	22:33	15			LRS2	cal							Yes
lrs20009904_01	Hg_B	22:34	15			LRS2	cal							Yes
0090	Dark	23:06	319.5			HPF	cal							Yes
0091	Quartz FCU	23:12	74.5			HPF	cal							Yes
0092	Quartz FCU	23:14	74.5			HPF	cal							Yes
0093	Quartz FCU	23:16	74.5			HPF	cal							Yes
0094	Quartz FCU	23:18	74.5			HPF	cal							Yes
0095	Quartz FCU	23:20	74.5			HPF	cal							Yes
0096	Quartz FCU	23:21	74.5			HPF	cal							Yes
0097	Quartz FCU	23:23	74.5			HPF	cal							Yes
0098	Alpha Bright Cal	23:25	85.2			HPF	cal							Yes
0099	Alpha Bright Cal	23:27	85.2			HPF	cal							Yes
0100	Alpha Bright Cal	23:29	85.2			HPF	cal							Yes
0101	Alpha Bright Cal	23:31	85.2			HPF	cal							Yes
0102	LFC FCU	23:34	106.5			HPF	cal							Yes
0103	LFC FCU	23:36	106.5			HPF	cal							Yes
0104	LFC Cal	23:39	106.5			HPF	cal							Yes
0105	LFC Cal	23:41	106.5			HPF	cal							Yes
0106	Etalon Cal	23:44	159.8			HPF	cal							Yes
0107	UNe Slave Cal	23:48	426			HPF	cal							Yes
lrs20000021_01	flat_Qth_R	23:48	15			LRS2	cal							Yes
lrs20000021_02	flat_Qth_R	23:49	15			LRS2	cal							Yes
lrs20000021_03	flat_Qth_R	23:51	15			LRS2	cal							Yes
lrs20000021_04	flat_Qth_R	23:52	15			LRS2	cal							Yes
lrs20000021_05	flat_Qth_R	23:53	15			LRS2	cal							Yes
lrs20000022_01	flat_ldls_long_B	23:54	20			LRS2	cal							Yes
0108	UNe Slave Cal	23:56	426			HPF	cal							Yes
lrs20000022_02	flat_ldls_long_B	23:56	20			LRS2	cal							Yes
lrs20000022_03	flat_ldls_long_B	23:57	20			LRS2	cal							Yes
lrs20000023_01	Cd-A_B	23:58	29			LRS2	cal							Yes