EF Peg – tricky photometry

[Mr Ian David Sharp]

Hi all,

Having seen a VSS alert about EF Peg in outburst (this is the first outburst detected of this UGSU star since January 2022), I was intrigued to observe it, especially in light of the fact that there is another star only 5 arc-seconds away.

I managed to arrange the star annulus to cover EF Peg and the Gap annulus to contain the near-by star with a clear background annulus. See attached screen shot. Also attached are the 6 measurements which averaged at Vmag = 11.80 (2025-08-28 21:21:43 UTC)

Cheers
Ian.

Attachments:

1. 

   EF-Peg-Photometry.png
   

2. 

   20250828_EF-Peg_V_PixelSkies-C11_IDS_plot_lines.png
   

[Gary Poyner]

Hi Ian,

Yep, it’s very tricky to measure. It’s easier visually. Unscrew your camera…;-)

Gary

[Author]

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