HET Night Report Reader

Civil Date	Ephemerides
2026-01-26	Sunset			Sunrise			Moon
	Set	12°	18°	18°	12°	Rise	Rise	Set
	00:34	01:21	01:50	12:26	12:55	13:43	-	08:38
Night Length	10:36		Sunset Temperature

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

Overlaps
TO Overlap	RA Overlap
Amy Westfall	-

Other Personnel	Nicole Wilson, Jose Fernandez

Guests	none

Open/Close Log
Open time	Outdoor temp	Truss temp	Close time	Reason	Time open
00:30	-2.2	4.2	12:19	twilight	11:49
Total Time Open					11:49

Program	Night Priority	Science
01:50	Science
02:52	Idle due to weather (Sky brightness)
03:06	Science
03:46	Idle due to weather (Poor IQ)
04:28	Science
05:41	Idle due to weather (Clouds)
06:09	Engineering (hpf)
07:10	Idle due to weather (Clouds)
09:15	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
01:23	02:05	0.61	0.98	-45	+3435	0.4	0.8	0.8	200	9	First of Night
↪ Comments			Chasing temps. Measured at 1/125 due to dome seeing.
04:29	05:19				+3925	-2.6	-2.1	-2.0	189	11	Stack/Re-stack
07:53	09:15	0.52	0.83	-5	+3742	2.4	2.6	2.3	243	5	Stack/Re-stack
↪ Comments			3:1 k actuator issues. See PR #6634.
12:08	12:16	0.60	0.97	85	+3364	2.1	2.6	2.7	280	11	Post-Observing

Problem Reports
PR Number	Times	Time Lost	Description	Response
6634	08:00-08:45	00:45	3:1 software limit issues.	Called: NW NW came up and covered mirror and unplugged problematic k actuator.
6627	02:10-02:15, 04:30-04:35, 04:45-04:50, 05:05-05:10	00:20	False 1.0 micron reading

TO Comments	Increasing clouds on back half 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
virus0000028_01	Hg	00:01	15			VIRUS	cal							Yes
virus0000028_02	Hg	00:02	15			VIRUS	cal							Yes
virus0000028_03	Hg	00:03	15			VIRUS	cal							Yes
lrs20000001_01	bias	00:05	0			LRS2	cal							Yes
lrs20000001_02	bias	00:05	0			LRS2	cal							Yes
virus0000001_01	bias	00:05	0			VIRUS	cal							Yes
virus0000001_02	bias	00:06	0			VIRUS	cal							Yes
lrs20000001_03	bias	00:06	0			LRS2	cal							Yes
virus0000001_03	bias	00:06	0			VIRUS	cal							Yes
lrs20000001_04	bias	00:07	0			LRS2	cal							Yes
virus0000001_04	bias	00:07	0			VIRUS	cal							Yes
lrs20000001_05	bias	00:08	0			LRS2	cal							Yes
virus0000001_05	bias	00:08	0			VIRUS	cal							Yes
lrs20000001_06	bias	00:09	0			LRS2	cal							Yes
virus0000001_06	bias	00:09	0			VIRUS	cal							Yes
lrs20000001_07	bias	00:10	0			LRS2	cal							Yes
virus0000001_07	bias	00:10	0			VIRUS	cal							Yes
lrs20000001_08	bias	00:11	0			LRS2	cal							Yes
virus0000001_08	bias	00:11	0			VIRUS	cal							Yes
lrs20000001_09	bias	00:11	0			LRS2	cal							Yes
virus0000001_09	bias	00:12	0			VIRUS	cal							Yes
lrs20000001_10	bias	00:12	0			LRS2	cal							Yes
virus0000001_10	bias	00:13	0			VIRUS	cal							Yes
lrs20000001_11	bias	00:13	0			LRS2	cal							Yes
virus0000001_11	bias	00:14	0			VIRUS	cal							Yes
lrs20000002_01	skyflat	00:39	7			LRS2	cal							Yes
lrs20000003_01	skyflat	00:40	10			LRS2	cal							Yes
lrs20000004_01	skyflat	00:41	13			LRS2	cal							Yes
lrs20000005_01	skyflat	00:42	16			LRS2	cal							Yes
lrs20000006_01	skyflat	00:43	22			LRS2	cal							Yes
lrs20000007_01	skyflat	00:45	30			LRS2	cal							Yes
virus0000002_01	skyflat	00:48	7			VIRUS	cal							Yes
virus0000003_01	skyflat	00:49	10			VIRUS	cal							Yes
virus0000004_01	skyflat	00:50	14			VIRUS	cal							Yes
virus0000005_01	skyflat	00:52	18			VIRUS	cal							Yes
virus0000006_01	skyflat	00:53	26			VIRUS	cal							Yes
lrs20000008_01	dark	00:55	360			LRS2	cal							Yes
virus0000007_01	dark	00:55	360			VIRUS	cal							Yes
lrs20000008_02	dark	01:02	360			LRS2	cal							Yes
virus0000007_02	dark	01:02	360			VIRUS	cal							Yes
lrs20000008_03	dark	01:09	360			LRS2	cal							Yes
virus0000007_03	dark	01:09	360			VIRUS	cal							Yes
0001	HR491_tell_std	02:11	117.2	6.0		HPF	telluric	1.70	0.81	19.59	0.92			Yes
0002	QID 1947	02:18	969.1	4.8	UT26-1-010	HPF	sci	1.40	1.00	19.50	0.95	71		Yes
virus0000008_01	parallel	02:18	2047			VIRUS	sci							Yes
0003	QID 1947	02:35	969.1	1.8	UT26-1-010	HPF	sci	1.47	0.90	19.57	0.93	76		Yes
0004	LFC Cal	02:53	106.5			HPF	cal							Yes
0005	LFC Cal	02:59	106.5			HPF	cal							Yes
lrs20000009_01	QID 1069	02:59	180	7.0	PSU26-1-016	LRS2-B	sci	1.55	1.05	19.04	0.84		Sky brightness too high due to moon proximity.	No
lrs20000009_02	QID 1069	03:03	180	1.0	PSU26-1-016	LRS2-B	sci	1.57	1.18	18.83	0.77			No
0006	QID 1945	03:13	969.1	6.8	UT26-1-010	HPF	sci	1.58	1.25	17.67	0.72	101		Yes
virus0000009_01	parallel	03:13	2047			VIRUS	sci							Yes
0007	QID 1945	03:30	969.1	0.8	UT26-1-010	HPF	sci	1.68	1.12	18.04	0.81	114		Yes
0008	LFC Cal	03:48	106.5			HPF	cal							Yes
virus0000010_01	parallel	03:54	2047			VIRUS	sci							Yes
0009	QID 1410	03:55	969.1	8.8	PSU26-1-002	HPF	sci	2.28	1.72	19.04	0.61	157	Poor image quality, seeing degraded during second exposure.	No
0010	QID 1410	04:12	969.1	0.8	PSU26-1-002	HPF	sci	2.78	2.16	19.13	0.56	141		No
0011	LFC Cal	04:30	106.5			HPF	cal							Yes
lrs20000010_01	G191B2B_056_W	05:25	60	6.0		LRS2	spec	1.83	1.35	19.08	0.65			Yes
lrs20000011_01	G191B2B_066_W	05:28	120	2.0		LRS2	spec	1.86	1.36	18.63	0.72			Yes
virus0000011_01	G191B2B_042_W	05:35	60	5.0		VIRUS	spec	1.87	1.27	19.02	0.64			Yes
virus0000011_02	G191B2B_042_W	05:37	60	1.0		VIRUS	spec	1.83	1.25	19.15	0.68			Yes
virus0000011_03	G191B2B_042_W	05:40	60	2.0		VIRUS	spec	1.79	1.14	19.18	0.67			Yes
0012	QID 1799	05:47	969.1	5.8	UT26-1-014	HPF	sci	1.95	1.86	18.05	0.38	236	Clouds, low transparency.	No
virus0000012_01	parallel	05:47	1023			VIRUS	sci							Yes
0013	LFC Cal	06:05	106.5			HPF	cal							Yes
0014	GJ_411	06:17	74.5	7.8	ENG26-1-000	HPF	eng	1.84	1.17	18.60	0.37	303	Transparency hovering around 0.50. Please reject if needed.	Yes
virus0000013_01	parallel	06:17	3811			VIRUS	eng							Yes
0015	GJ_411	06:19	74.5	0.8	ENG26-1-000	HPF	eng	1.85	1.25	18.69	0.41	276		Yes
0016	GJ_411	06:21	74.5	0.8	ENG26-1-000	HPF	eng	1.88	1.30	18.76	0.41	285		Yes
0017	GJ_411	06:23	74.5	0.8	ENG26-1-000	HPF	eng	2.10	1.53	18.83	0.46	315		Yes
0018	GJ_411	06:24	74.5	0.8	ENG26-1-000	HPF	eng	2.19	1.82	18.87	0.47	304		Yes
0019	GJ_411	06:26	74.5	-0.2	ENG26-1-000	HPF	eng	2.29	3.11	18.91	0.47	291		Yes
0020	GJ_411	06:28	74.5	0.8	ENG26-1-000	HPF	eng	2.19	2.06	19.01	0.49	314		Yes
0021	GJ_411	06:30	74.5	0.8	ENG26-1-000	HPF	eng	2.23	1.64	19.10	0.55	332		Yes
0022	GJ_411	06:31	74.5	0.8	ENG26-1-000	HPF	eng	2.10	1.59	19.18	0.57	355		Yes
0023	GJ_411	06:33	74.5	-0.2	ENG26-1-000	HPF	eng	2.15	1.71	19.21	0.58	348		Yes
0024	GJ_411	06:35	74.5	0.8	ENG26-1-000	HPF	eng	2.13	2.02	19.14	0.49	334		Yes
0025	GJ_411	06:37	74.5	0.8	ENG26-1-000	HPF	eng	2.07	1.83	19.07	0.52	356		Yes
0026	GJ_411	06:39	74.5	0.8	ENG26-1-000	HPF	eng	2.12	1.61	19.12	0.52	354		Yes
0027	GJ_411	06:40	74.5	0.8	ENG26-1-000	HPF	eng	2.08	1.73	19.15	0.53	351		Yes
0028	GJ_411	06:42	74.5	-0.2	ENG26-1-000	HPF	eng	2.18	1.81	19.19	0.52	336		Yes
0029	GJ_411	06:44	74.5	0.8	ENG26-1-000	HPF	eng	2.04	1.77	19.21	0.52	365		Yes
0030	GJ_411	06:46	74.5	0.8	ENG26-1-000	HPF	eng	2.18	1.86	19.26	0.52	352		Yes
0031	GJ_411	06:47	74.5	0.8	ENG26-1-000	HPF	eng	2.14	2.11	19.22	0.49	362		Yes
0032	GJ_411	06:49	74.5	-0.2	ENG26-1-000	HPF	eng	2.12	2.00	19.15	0.46	355		Yes
0033	GJ_411	06:51	74.5	0.8	ENG26-1-000	HPF	eng	2.04	1.98	19.24	0.50	338		Yes
0034	GJ_411	06:53	74.5	0.8	ENG26-1-000	HPF	eng	2.09	1.84	19.13	0.46	330		Yes
0035	GJ_411	06:55	74.5	0.8	ENG26-1-000	HPF	eng	2.17	2.05	19.12	0.45	308		Yes
0036	GJ_411	06:56	74.5	0.8	ENG26-1-000	HPF	eng	2.38	2.25	19.12	0.43	280		Yes
0037	GJ_411	06:58	74.5	-0.2	ENG26-1-000	HPF	eng	2.20	2.30	19.11	0.43	308		Yes
0038	GJ_411	07:00	74.5	0.8	ENG26-1-000	HPF	eng	2.17	1.69	19.09	0.42	290		Yes
0039	GJ_411	07:02	74.5	0.8	ENG26-1-000	HPF	eng	2.02	1.51	19.03	0.38	281		Yes
0040	GJ_411	07:03	74.5	0.8	ENG26-1-000	HPF	eng	2.18	1.72	19.04	0.41	252		Yes
0041	GJ_411	07:05	74.5	-0.2	ENG26-1-000	HPF	eng	2.18	1.50	19.11	0.43	266		Yes
0042	GJ_411	07:07	74.5	0.8	ENG26-1-000	HPF	eng	2.23	1.35	19.09	0.40	243		Yes
0043	GJ_411	07:09	74.5	0.8	ENG26-1-000	HPF	eng	2.26	1.46	19.06	0.42	235		Yes
0044	LFC Cal	07:11	106.5			HPF	cal							Yes
0045	QID 1956	07:17	649.6	7.2	UT26-1-010	HPF	sci	2.50	2.31	19.07	0.47	178	Clouds, low transparency.	No
virus0000014_01	parallel	07:17	2083			VIRUS	sci							Yes
0046	QID 1956	07:29	649.6	1.2	UT26-1-010	HPF	sci	2.39	1.45	19.30	0.49	188		No
0047	QID 1956	07:40	649.6	0.2	UT26-1-010	HPF	sci	2.32	1.32	19.10	0.24	80		No
0048	LFC Cal	07:53	106.5			HPF	cal							Yes
virus0000015_01	parallel	09:21	2047			VIRUS	sci							Yes
0049	QID 1410	09:22	969.1	6.8	PSU26-1-002	HPF	sci	1.36		20.00	0.32	177	Clouds, low transparency.	No
0050	QID 1410	09:39	969.1	0.8	PSU26-1-002	HPF	sci	1.37	1.11	20.08	0.52	225		No
0051	LFC Cal	09:57	106.5			HPF	cal							Yes
0052	LFC Cal	10:02	106.5			HPF	cal							Yes
lrs20000012_01	parallel	10:02	360			LRS2	sci							Yes
virus0000016_01	QID 1967	10:02	360	7.0	UT26-1-008	VIRUS	sci	1.64	1.18	21.91	0.45		Clouds, low transparency.	No
0053	LFC Cal	10:04	106.5			HPF	cal							Yes
lrs20000012_02	parallel	10:09	360			LRS2	sci							Yes
virus0000016_02	QID 1967	10:09	360	1.0	UT26-1-008	VIRUS	sci	1.56	1.17	21.88	0.26			No
lrs20000012_03	parallel	10:16	360			LRS2	sci							Yes
virus0000016_03	QID 1967	10:16	360	1.0	UT26-1-008	VIRUS	sci	1.60	1.27	21.91	0.19			No
0054	LFC Cal	10:27	106.5			HPF	cal							Yes
lrs20000013_01	parallel	10:27	400			LRS2	sci							Yes
virus0000017_01	QID 2515	10:27	400	4.3	UT26-1-013	VIRUS	sci	1.58	1.23	21.83	0.09		Clouds, low transparency.	No
0055	LFC Cal	10:29	106.5			HPF	cal							Yes
0056	LFC Cal	10:32	106.5			HPF	cal							Yes
lrs20000013_02	parallel	10:34	400			LRS2	sci							Yes
virus0000017_02	QID 2515	10:34	400	1.3	UT26-1-013	VIRUS	sci	1.51	0.99	21.81	0.16			No
lrs20000013_03	parallel	10:42	400			LRS2	sci							Yes
virus0000017_03	QID 2515	10:42	400	1.3	UT26-1-013	VIRUS	sci	1.44	0.98	21.79	0.25			No
0057	QID 1956	10:55	649.6	6.2	UT26-1-010	HPF	sci	1.47	1.13	20.11	0.18	190	Clouds, low transparency.	No
virus0000018_01	parallel	10:55	2083			VIRUS	sci							Yes
0058	QID 1956	11:07	649.6	1.2	UT26-1-010	HPF	sci	1.52	1.22	20.11	0.07	92		No
0059	QID 1956	11:19	649.6	0.2	UT26-1-010	HPF	sci	2.03	1.50	19.92	0.13	68		No
0060	LFC Cal	11:31	106.5			HPF	cal							Yes
0061	QID 1835	11:38	340.8	9.3	PSU26-1-010	HPF	sci	1.72	1.42	20.07	0.13	176	Clouds, low transparency.	No
virus0000019_01	parallel	11:38	374			VIRUS	sci							Yes
virus0000020_01	parallel	11:50	2047			VIRUS	sci							Yes
0062	QID 1977	11:51	969.1	6.8	UT26-1-003	HPF	sci	1.41	0.84	19.81	0.09	14	Clouds, low transparency, aborted after first exposure.	No
lrs20000014_01	bias	12:10	0			LRS2	cal							Yes
virus0000021_01	bias	12:11	0			VIRUS	cal							Yes
virus0000022_01	Cd-A	12:15	15		ENG26-1-002	VIRUS	cal							Yes
virus0000023_01	Hg	12:17	15		ENG26-1-002	VIRUS	cal							Yes
0063	Dark	12:24	319.5			HPF	cal							Yes
0064	Quartz FCU	12:36	74.5			HPF	cal							Yes
0065	Quartz FCU	12:37	74.5			HPF	cal							Yes
0066	Quartz FCU	12:39	74.5			HPF	cal							Yes
0067	Quartz FCU	12:41	74.5			HPF	cal							Yes
0068	Quartz FCU	12:43	74.5			HPF	cal							Yes
0069	Quartz FCU	12:44	74.5			HPF	cal							Yes
0070	Quartz FCU	12:46	74.5			HPF	cal							Yes
0071	Alpha Bright Cal	12:48	85.2			HPF	cal							Yes
0072	Alpha Bright Cal	12:50	85.2			HPF	cal							Yes
0073	Alpha Bright Cal	12:52	85.2			HPF	cal							Yes
0074	Alpha Bright Cal	12:54	85.2			HPF	cal							Yes
0075	LFC FCU	12:57	106.5			HPF	cal							Yes
0076	LFC FCU	12:59	106.5			HPF	cal							Yes
0077	LFC FCU	13:02	106.5			HPF	cal							Yes
0078	LFC FCU	13:04	106.5			HPF	cal							Yes
0079	LFC FCU	13:06	106.5			HPF	cal							Yes
0080	LFC FCU	13:09	106.5			HPF	cal							Yes
0081	LFC Cal	13:12	106.5			HPF	cal							Yes
0082	LFC Cal	13:14	106.5			HPF	cal							Yes
0083	Etalon Cal	13:22	159.8			HPF	cal							Yes
0084	Etalon Cal	13:25	159.8			HPF	cal							Yes
0085	Etalon Cal	13:28	159.8			HPF	cal							Yes
0086	Etalon Cal	13:31	159.8			HPF	cal							Yes
0087	UNe Slave Cal	13:35	426			HPF	cal							Yes
0088	UNe Slave Cal	13:43	426			HPF	cal							Yes
0089	UNe Slave Cal	13:50	426			HPF	cal							Yes
0090	UNe Slave Cal	13:58	426			HPF	cal							Yes
0091	UNe Slave Cal	14:06	426			HPF	cal							Yes
0092	UNe Slave Cal	14:14	426			HPF	cal							Yes
0092	LFC Cal	22:15	106.5			HPF	cal							Yes
lrs20009900_01	bias	22:28	0			LRS2	cal							Yes
virus0009900_01	flat_Qth	22:29	20			VIRUS	cal							Yes
virus0009901_01	bias	22:30	0			VIRUS	cal							Yes
lrs20009901_01	flat_ldls_long_B	22:31	20			LRS2	cal							Yes
virus0009902_01	dark	22:32	15			VIRUS	cal							Yes
lrs20009902_01	Cd-A_B	22:33	29			LRS2	cal							Yes
lrs20009903_01	FeAr_R	22:35	15			LRS2	cal							Yes
lrs20009904_01	Hg_B	22:36	15			LRS2	cal							Yes
0093	Dark	22:39	319.5			HPF	cal							Yes
0094	Quartz FCU	22:45	74.5			HPF	cal							Yes
0095	Quartz FCU	22:47	74.5			HPF	cal							Yes
0096	Quartz FCU	22:49	74.5			HPF	cal							Yes
0097	Quartz FCU	22:51	74.5			HPF	cal							Yes
0098	Quartz FCU	22:52	74.5			HPF	cal							Yes
0099	Quartz FCU	22:54	74.5			HPF	cal							Yes
0100	Quartz FCU	22:56	74.5			HPF	cal							Yes
0101	Alpha Bright Cal	22:58	85.2			HPF	cal							Yes
0102	Alpha Bright Cal	23:00	85.2			HPF	cal							Yes
0103	Alpha Bright Cal	23:02	85.2			HPF	cal							Yes
0104	Alpha Bright Cal	23:04	85.2			HPF	cal							Yes
0105	LFC FCU	23:07	106.5			HPF	cal							Yes
0106	LFC FCU	23:09	106.5			HPF	cal							Yes
0107	LFC Cal	23:12	106.5			HPF	cal							Yes
0108	LFC Cal	23:14	106.5			HPF	cal							Yes
0109	Etalon Cal	23:17	159.8			HPF	cal							Yes
0110	UNe Slave Cal	23:20	426			HPF	cal							Yes
lrs20000011_01	flat_Qth_R	23:21	15			LRS2	cal							Yes
lrs20000011_02	flat_Qth_R	23:22	15			LRS2	cal							Yes
lrs20000011_03	flat_Qth_R	23:24	15			LRS2	cal							Yes
lrs20000011_04	flat_Qth_R	23:25	15			LRS2	cal							Yes
lrs20000011_05	flat_Qth_R	23:26	15			LRS2	cal							Yes
lrs20000012_01	flat_ldls_long_B	23:27	20			LRS2	cal							Yes
0111	UNe Slave Cal	23:28	426			HPF	cal							Yes
lrs20000012_02	flat_ldls_long_B	23:29	20			LRS2	cal							Yes
lrs20000012_03	flat_ldls_long_B	23:30	20			LRS2	cal							Yes
lrs20000013_01	Cd-A_B	23:31	29			LRS2	cal							Yes
lrs20000013_02	Cd-A_B	23:33	29			LRS2	cal							Yes
lrs20000013_03	Cd-A_B	23:34	29			LRS2	cal							Yes
0112	UNe Slave Cal	23:36	426			HPF	cal							Yes
lrs20000014_01	FeAr_R	23:36	15			LRS2	cal							Yes
lrs20000014_02	FeAr_R	23:37	15			LRS2	cal							Yes
lrs20000014_03	FeAr_R	23:38	15			LRS2	cal							Yes
lrs20000015_01	Hg_R	23:39	20			LRS2	cal							Yes
lrs20000015_02	Hg_R	23:41	20			LRS2	cal							Yes
lrs20000015_03	Hg_R	23:42	20			LRS2	cal							Yes
lrs20000016_01	Hg_B	23:43	15			LRS2	cal							Yes
0113	UNe Slave Cal	23:44	426			HPF	cal							Yes
lrs20000016_02	Hg_B	23:44	15			LRS2	cal							Yes
lrs20000016_03	Hg_B	23:46	15			LRS2	cal							Yes
0114	UNe Slave Cal	23:52	426			HPF	cal							Yes
virus0000026_01	flat_ldls_long	23:52	15			VIRUS	cal							Yes
virus0000026_02	flat_ldls_long	23:54	15			VIRUS	cal							Yes
virus0000026_03	flat_ldls_long	23:55	15			VIRUS	cal							Yes
virus0000027_01	Cd-A	23:56	15			VIRUS	cal							Yes
virus0000027_02	Cd-A	23:58	15			VIRUS	cal							Yes
0115	UNe Slave Cal	23:59	426			HPF	cal							Yes
virus0000027_03	Cd-A	23:59	15			VIRUS	cal							Yes