BL Lac

[Gary Poyner]

The Blazar (AGN) BL Lac is currently in a bright outburst at 12.6C (Sep 08.027 UT). This is a rise of ~1.5 mags in just four days. Atel #16806 gives some further information.

There is a BAAVSS chart here for visual observers. Photometric tables are available with charts from the AAVSO web site.

Gary

[Mr Ian David Sharp]

Hi Gary,

I got it last night from Spain in R and V. See attached.

R = 12.97, V = 13.57 (average of 19 measurements)

Cheers
Ian.

Attachments:

1. 

   Screenshot-2024-09-09-092415.jpg
   

[Gary Poyner]

This looks to be a short duration event, but brightness can change quickly with BL Lac, so it might brighten again. Keep looking!

Gary

[Mr Ian David Sharp]

Hi Gary,

Last night both R and V were about 0.6 mags brighter than the previous night. See attached.

Averages: R = 12.4, V = 13.0

Cheers
Ian.

Attachments:

1. 

   BL_LAC_20240910.jpg
   

[Gary Poyner]

Thanks Ian. I had 13.2 visual last night, and I also have an unfiltered Slooh image which I haven’t measured yet.

Gary

[Mr Ian David Sharp]

Hi Gary,

A tad brighter last night, see attached.

R = 12.3, V = 12.9

Cheers
Ian.

Attachments:

1. 

   BL_Lac.jpg
   

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