[Mr Ian David Sharp]

Dr Paul Leyland wrote:

Out of interest, what SIMBAD/VIZIER data do you use? For my purposes all that is required is the magnitudes and the coordinates, all of which is provided in a single download from AAVSO.

I use it to get the B-V of the target star. I couldn’t find that in the AAVSO data.
Cheers
Ian.

[Mr Ian David Sharp]

Personally I like the AAVSO charts and lists of comparison stars because it’s easy to query via my Python code via the AAVSO API. I combine that with SIMBAD/VIZIER data to get other parameters of the target star and I can then create a good list comparison stars for ensemble photometry. I just live with the chart ID warning when I upload to the BAA database.
Cheers
Ian.

[Mr Ian David Sharp]

I agree. I removed my post after I realised the BAA is not the appropriate place for this sort of thing.
Ian.

• This reply was modified 2 years, 3 months ago by Mr Ian David Sharp.

[Mr Ian David Sharp]

Thanks Eric and Paul,

With the amazing Photometric and Spectrophotometric colour calibration processes in PixInsight these days I’m pretty sure it will all work out fine.

Cheers
Ian.

[Mr Ian David Sharp]

Hi all,

There has been quite a healthy discussion on this in the AAVSO forums and it seems that the answer is yes – there should be no problems doing this.

I’d still be interested in any experiences on this.

Cheers
Ian.

[Mr Ian David Sharp]

It’s faded since yesterday – see attached.
Cheers
Ian

Attachments:

1. 

   2023-04-22.jpg
   

2. 

   2023-04-23.jpg
   

[Mr Ian David Sharp]

Thanks Robin,

A great setup and some nice results!

On a less expensive note, I’m just about to upgrade my system at PixelSkies in Spain to a C11 Edge HD with RVB photometric filters (from a 104mm APO I have at present). No spectrograph though!
Cheers
Ian.

[Mr Ian David Sharp]

Here are both V and I magnitudes.

Attachments:

1. 

   PNV-J17224490-4137160_Chart.jpg
   

[Mr Ian David Sharp]

Here is a short video of the ingress.

https://youtu.be/082fUA08mls

Best Regards
Ian

[Mr Ian David Sharp]

Hi all,

Clear last night. Managed to get a few exposures early on. Average mag. over 8 x 20 second exposures was 8.133 +/- 0.030. This was with no filter.

Equipment: C9.25 @ f/. SX TRIUS 694 Pro CCD, Calibrated with Bias, Flats and Darks. Photometry processing in AstroArt 7.

Cheers

Ian.

[Mr Ian David Sharp]

Thanks for the analysis Nick!

Ian

[Mr Ian David Sharp]

Yes indeed, a very enjoyable day

Ian

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