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![bl lac.gif](https://static.wixstatic.com/media/df3e23_59c4a11bbc154c28a0b9a00b6fcd1e0b~mv2.gif)
![](https://static.wixstatic.com/media/df3e23_89b2ea1fc89c46c0bdf3fcb32c26ca16.gif)
1999 saw BL Lac reach it's brightest magnitude for 30 years, since when several bright 'outbursts' have been seen.
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Since 2011 BL Lac has been steadily brightening, culminating in a major 'outburst' during 2020.
Left This light curve displays short term optical variations detected during the large optical and X-ray outburst of 1997
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