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DQ Vul and V0433 Vul

raymundang
Affiliation
American Association of Variable Star Observers (AAVSO)
Fri, 11/10/2023 - 05:26

I was doing photometry from photos of M27 2 months ago, and noticed a CV magnitude of around 11.7 for DQ Vul. According to VSX, DQ Vul has a mag range of 14.5 - <17.0 p. Previous V filter magnitudes from around 2015 is on the 15.5 mag average.

I know it's 2 months ago, but just wanted to know if anyone has photo's of M27 from Sept onwards, and maybe check if DQ Vul is indeed close to 11.7 CV or V? Waiting for good weather to do a follow up...

I also got CV magnitude for V0433 Vul (also near M27) at 11.2 - which is within range based on VSX (10.3 - 11.2 *) - but previous V magnitudes are in 14 to 15.5 mag range. The object is bright enough to be 11.2. I used Tycho Tracker for preprocessing and photometry.

Below is the link to the image. 

https://astroleaguephils.org/submission/dq-vul-brightening-than-usual/

Thanks,

Raymund

raymundang
Affiliation
American Association of Variable Star Observers (AAVSO)
Sat, 11/11/2023 - 00:22
Follow Up

I am currently making a follow up after the image from 2 months ago. DQ Vul is still bright - not fainter than 14.5 mag.

I got a magnitude of around 11.8 CV for tonight.

Raymund

UPDATE: Difference in magnitude may be related to the variable being a Mira / red star and using clear/color camera. ASAS-SN data also showed nothing unusual. Thanks, Sebastian!