BLLac

General information

• Name of the source: BL Lacertae
• Brief description of the source:

- Object type : Blazar

- RA: 22 02 43.3 (hh mm ss), Dec: +42 16 40 (dd mm ss)

Data-taking information

Date	Runs	total time (h)	ZD range (deg)	AZ range (deg)	Transmission9km	Joint MAGIC	Comments
2021-07-09	5219-5220	x	25	x	x	~90%	x
2021-07-10	5229-5235	x	20-40	x	40-60%	y (5229-5230)	x
2021-07-12	5251-5252	x	43-47	x	45-60%	y	x
2021-07-15	5273-5276	x	20-40	x	>80%	y (5229-5230)	x
2021-07-16	5282-5283	x	x	x	~60%	y (5283)	x
2021-07-17	5302-5304	x	x	x	~60%	y	x
2021-07-18	5335-5336	x	17-20	x	~70%	y (5229-5230)	x
2021-08-02	5443-5450	x	22-31	x	x	y (5443-5444)	x
2021-08-03	5454-5460, 5266	x	15-50	x	x	y (5454-5455)	x
2021-08-04	5481-5482	x	14	x	>80%	x	x

• Dates of data-taking (yyyymmdd): 20210809, 20210810, 20210812, 20210813, 20210814, 20210815, 20210829, 20210830, 20210901, 20210902.

- Date [yyyymmdd] (time of observation h): 20210809 (1.23)

• ZD range (deg): [36, 42]
• AZ range (deg): [181, 226]
• Transmission9km: 0.91-1.03
• Runs: 5580-5584
• Joint observations with MAGIC? : No (5580-5581), Yes (5582-5584)
• Comments: Dark conditions. Huge spike in the trigger rate and decrease HV (23:17).

- Date [yyyymmdd] (time of observation h): 20210810 (2.55)

• ZD range (deg): [36, 58]
• AZ range (deg): [181, 240]
• Transmission9km: 0.90-1.05
• Runs: 5630-5639
• Joint observations with MAGIC? : No?
• Comments: Moon and moon set conditions. Spikes in camera rate. Car flashes. MAGIC LIDAR in our FoV every 4 min (5634-5636).

- Date [yyyymmdd] (time of observation h): 20210812 (2.10)

• ZD range (deg): [36,54]
• AZ range (deg): [184, 235]
• Transmission9km: 0.89-0.96
• Runs: 5696-5704
• Joint observations with MAGIC? : Yes?
• Comments: Moon and moon set conditions. Spikes in camera rate.

- Date [yyyymmdd] (time of observation h): 20210813 ()

• ZD range (deg): Zenith Range
• AZ range (deg): Azimuth Range
• Transmission9km: None, 0.6, 0.46, 0.17, 0.19, 0.28
• Runs: 5719,5722-5726
• Joint observations with MAGIC? : Yes?
• Comments: Moon and moon set conditions. Spikes in camera rate, decreasing anode current.

BL Lac data analysis

Related analysis pages

Analysis_BLLac_July_2021 (fast analysis for LST-1 ATel https://www.astronomerstelegram.org/?read=14783 )

Analysis_BLLac_Aug_2021_Nozaki (Aug 8 flare analysis for LST general meeting, 2021 Nov)

Analysis_BLLac_Aug_2021_Emery (Aug 2-13th and 8th flare analysis for LST general meeting, 2021 Nov. With the likelihood reconstruction method.)