HET Night Report Reader

Civil Date	Ephemerides
2026-10-16	Sunset			Sunrise			Moon
	Set	12°	18°	18°	12°	Rise	Rise	Set
	00:30	01:15	01:43	11:39	12:07	12:53	-	04:31
Night Length	9:56		Sunset Temperature

On-Duty Personnel
Resident Astronomer	Telescope Operator	OPS Engineer	Day Ops
Sergey Rostopchin	Aiden Dillard	-	-

Overlaps		none

Other Personnel	none

Guests	none

Open/Close Log
Open time	Outdoor temp	Truss temp	Close time	Reason	Time open
00:36	3.2	5.1	01:57	clouds	01:21
08:10	0.3	2.9	10:40	clouds	02:30
Total Time Open					3:51

Program	Night Priority	Science
01:43	Idle due to weather (clouds)
08:15	Science
08:40	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
00:54	01:57	0.52	0.81	-400	+6178	2.5	3.3	3.5	28	6	First of Night
↪ Comments			Significant temperature difference from most recent reference extended the duration of the stack.
09:24	10:16	0.47	0.61	-440	+7467	-0.4	0.5	0.7	51	12	Stack/Re-stack

Problem Reports
PR Number	Times	Time Lost	Description	Response
6328	00:54-01:57	01:03	Piston Donuted Segments	Donuted segments. Pistoned 8:6 (55) and 9:3 (28) by +20um
6725	00:30-00:36	00:06	Shutter halted mid-opening, stuck part way open, required inverter power cycle

Ops Comments	none

TO Comments	Unable to observe for the majority of the night due to high cloud cover.

RA Comments	none

Observations
File	Target/QID	Exp Start	Exposure	Overhead	Program	Instrument Configuration	Data Type	IQ	Dimm	SkySBrt	Skytrans	SNR	Comments	Charge
lrs20000012_03	Cd-A_B	00:01	29			LRS2	cal							Yes
lrs20000002_01	FeAr_R	00:14	15			LRS2	cal							Yes
lrs20000002_02	FeAr_R	00:15	15			LRS2	cal							Yes
lrs20000002_03	FeAr_R	00:16	15			LRS2	cal							Yes
lrs20000003_01	Hg_R	00:17	20			LRS2	cal							Yes
lrs20000003_02	Hg_R	00:19	20			LRS2	cal							Yes
lrs20000003_03	Hg_R	00:20	20			LRS2	cal							Yes
lrs20000004_01	Hg_B	00:21	15			LRS2	cal							Yes
lrs20000004_02	Hg_B	00:23	15			LRS2	cal							Yes
lrs20000004_03	Hg_B	00:24	15			LRS2	cal							Yes
virus0000001_01	skyflat	00:43	7			VIRUS	cal							Yes
virus0000002_01	skyflat	00:45	10			VIRUS	cal							Yes
virus0000003_01	skyflat	00:46	14			VIRUS	cal							Yes
virus0000004_01	skyflat	00:47	18			VIRUS	cal							Yes
virus0000005_01	skyflat	00:49	26			VIRUS	cal							Yes
lrs20000005_01	G191B2B_056_E	08:22	60	7.0		LRS2	spec	2.01		21.55	0.11			Yes
lrs20000006_01	G191B2B_056_E	08:33	120	10.0		LRS2	spec	1.93		21.77	0.71			Yes
lrs20000007_01	G191B2B_066_E	08:37	180	2.0		LRS2	spec	2.07		20.64	0.99			Yes
virus0000006_01	parallel	08:52	3000			VIRUS	sci							Yes
lrs20000008_01	QID 968	08:53	1800	13.0	PSU26-3-006	LRS2-B	sci	2.40		21.73	0.84		clouds	No
lrs20000009_01	bias	10:40	0			LRS2	cal							Yes
virus0000007_01	bias	10:41	0			VIRUS	cal							Yes
virus0000008_01	Cd-A	10:45	15		ENG26-3-002	VIRUS	cal							Yes
virus0000009_01	Hg	10:47	15		ENG26-3-002	VIRUS	cal							Yes
lrs20009900_01	bias	21:57	0			LRS2	cal							Yes
lrs20009905_01	bias	22:00	0			LRS2	cal							Yes
virus0009900_01	flat_Qth	22:01	20			VIRUS	cal							Yes
virus0009901_01	bias	22:03	0			VIRUS	cal							Yes
lrs20009906_01	flat_ldls_long_B	22:03	20			LRS2	cal							Yes
virus0009902_01	dark	22:05	15			VIRUS	cal							Yes
lrs20009907_01	Cd-A_B	22:05	29			LRS2	cal							Yes
lrs20009908_01	FeAr_R	22:07	15			LRS2	cal							Yes
lrs20009909_01	Hg_B	22:08	15			LRS2	cal							Yes
lrs20000002_01	flat_Qth_R	22:21	15			LRS2	cal							Yes
lrs20000002_02	flat_Qth_R	22:23	15			LRS2	cal							Yes
lrs20000002_03	flat_Qth_R	22:24	15			LRS2	cal							Yes
lrs20000002_04	flat_Qth_R	22:25	15			LRS2	cal							Yes
lrs20000002_05	flat_Qth_R	22:26	15			LRS2	cal							Yes
virus0000004_01	flat_ldls_long	22:48	15			VIRUS	cal							Yes
virus0000004_02	flat_ldls_long	22:50	15			VIRUS	cal							Yes
virus0000004_03	flat_ldls_long	22:51	15			VIRUS	cal							Yes
virus0000005_01	Cd-A	22:53	15			VIRUS	cal							Yes
virus0000005_02	Cd-A	22:54	15			VIRUS	cal							Yes
virus0000005_03	Cd-A	22:55	15			VIRUS	cal							Yes
virus0000006_01	Hg	22:57	15			VIRUS	cal							Yes
lrs20000005_01	dark	22:58	10			LRS2	cal							Yes
virus0000006_02	Hg	22:58	15			VIRUS	cal							Yes
lrs20000006_01	bias	22:59	0			LRS2	cal							Yes
virus0000006_03	Hg	22:59	15			VIRUS	cal							Yes
lrs20000007_01	bias	23:01	0			LRS2	cal							Yes
lrs20000007_02	bias	23:01	0			LRS2	cal							Yes
virus0000007_01	bias	23:01	0			VIRUS	cal							Yes
virus0000007_02	bias	23:02	0			VIRUS	cal							Yes
lrs20000007_03	bias	23:02	0			LRS2	cal							Yes
virus0000007_03	bias	23:03	0			VIRUS	cal							Yes
lrs20000007_04	bias	23:03	0			LRS2	cal							Yes
virus0000007_04	bias	23:03	0			VIRUS	cal							Yes
lrs20000007_05	bias	23:04	0			LRS2	cal							Yes
virus0000007_05	bias	23:04	0			VIRUS	cal							Yes
lrs20000007_06	bias	23:05	0			LRS2	cal							Yes
virus0000007_06	bias	23:05	0			VIRUS	cal							Yes
lrs20000007_07	bias	23:06	0			LRS2	cal							Yes
virus0000007_07	bias	23:06	0			VIRUS	cal							Yes
lrs20000007_08	bias	23:07	0			LRS2	cal							Yes
virus0000007_08	bias	23:07	0			VIRUS	cal							Yes
lrs20000007_09	bias	23:08	0			LRS2	cal							Yes
virus0000007_09	bias	23:08	0			VIRUS	cal							Yes
lrs20000007_10	bias	23:08	0			LRS2	cal							Yes
virus0000007_10	bias	23:09	0			VIRUS	cal							Yes
lrs20000007_11	bias	23:09	0			LRS2	cal							Yes
virus0000007_11	bias	23:10	0			VIRUS	cal							Yes
lrs20000008_01	dark	23:10	360			LRS2	cal							Yes
virus0000008_01	dark	23:11	360			VIRUS	cal							Yes
lrs20000008_02	dark	23:17	360			LRS2	cal							Yes
virus0000008_02	dark	23:17	360			VIRUS	cal							Yes
lrs20000008_03	dark	23:24	360			LRS2	cal							Yes
virus0000008_03	dark	23:24	360			VIRUS	cal							Yes
lrs20000011_01	flat_ldls_long_B	23:54	20			LRS2	cal							Yes
lrs20000011_02	flat_ldls_long_B	23:55	20			LRS2	cal							Yes
lrs20000011_03	flat_ldls_long_B	23:56	20			LRS2	cal							Yes
lrs20000012_01	Cd-A_B	23:58	29			LRS2	cal							Yes
lrs20000012_02	Cd-A_B	23:59	29			LRS2	cal							Yes

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