GRB210731A

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Status

Step	Status	Comment
DL2 Production	Done
Low Level Check	To do
DL3 Production	Done
High Level Analysis	Done

Green color code : 00BA00 Red Color code : FF0000

Multi-wavelength Observations

Timeline

T0+	Instrument	Outcome	Outcome specific value (flux/UL/...)	Comment	Link
-		Initial detection
		UL
		Detection

Alert

• Triggered by: Swift-BAT

• Alert coordinates: 300.30500 -28.06105

• Alert arrival time: 22:21:08 UT

• Additional info:

LST Observations

• Delay: 41 min

• Overall observation time: 1.7 h

• Observation mode: std wobbles (0.4°)

• Observed source position: 300.305 -28.061

• Observation condition:

• Zenith range: 60°-56°

• ELOG link: elog 1865

• Important comments: moderate high dust values, camera problems

• Run list :

Run number	Start date	Stop date	Drive target name	RA	Dec	Observation condition
5421	2021-07-31 23:02	2021-07-31 23:22	None	300.79	-28.11	zen = 60° rate = 4906 Hz nsb = 1.6
5422	2021-07-31 23:27	2021-07-31 23:47	None	300.78	-28.11	zen = 58° rate = 4117 Hz nsb = 1.6
5423	2021-07-31 23:57	2021-08-01 0:17	None	299.87	-28.10	zen = 56.5° rate = 5465 Hz nsb = 1.6
5425	2021-08-01 0:31	2021-08-01 0:51	None	300.31	-27.70	zen = 56° rate = 5650 Hz nsb = 1.6
5426	2021-08-01 0:58	2021-08-01 0:59	None	300.30	-28.49	zen = 57° rate = 7417 Hz nsb = 2.0
5427	2021-08-01 1:01	2021-08-01 1:21	None	300.30	-28.49	zen = 57.5° rate = 4126 Hz nsb = 2.1
5432	2021-08-01 1:45	2021-08-01 1:52	None	299.84	-28.08	zen = 59° rate = 797 Hz nsb = 4.6

Low level check

Run xxxxxx : pdf file low level check

Run xxxxxx : pdf file low level check

Run xxxxxx : pdf file low level check

Run xxxxxx : pdf file low level check

Upload low level check plots and comment possible issue and action taken

High Level Analysis

Analysis configuration

• Name and contact info of the analyzer: Sami Caroff

• Software versions:
  • lstchain v0.9.3
  • gammapy v0.19

• Cuts and parameters used: std

• DL2 MC data used:
  • dl2_electron_40deg_180deg_off0.4deg_20220304_v0.9.3_prod5_trans_80_zen40az180_local_tailcut_8_4_testing.h5
  • dl2_proton_40deg_180deg_off0.4deg_20220304_v0.9.3_prod5_trans_80_zen40az180_local_tailcut_8_4_testing.h5
  • dl2_gamma_40deg_180deg_off0.4deg_20220304_v0.9.3_prod5_trans_80_zen40az180_local_tailcut_8_4_testing.h5

• Overall selected observation time: ~1h

• Position analyzed: e.g., RA, DEC
  • RA 300.305
  • DEC -28.061

• Analysis/data problems:

Theta2 plot

If the alert was observed for several nights please add plots for each night separately and all data together.

Theta2 plot for GRB210704A.

Theta2 Excess plot for GRB210704A.

Significance map

If the alert was observed for several nights please add plots for each night separately and all data together.

Excess map

If the alert was observed for several nights please add plots for each night separately and all data together.