[Mr Ian David Sharp]

Hi all,

Eight consecutive nights from my C11 in Spain shown here – the graceful decline continues…

Cheers
Ian

Attachments:

1. 

   V615_Vul_20240809_ids.jpg
   

[Mr Ian David Sharp]

Hi all,

Just processed 7 images from Spain overnight. Average of 12.38 in V. See attached. Data has been uploaded.

Cheers
Ian.

Attachments:

1. 

   20240808_UZ-BOO_V_PixelSkies-C11_IDS_plot_points.png
   

2. 

   20240808_UZ-BOO_V_PixelSkies-C11_IDS_plot_lines_check.png
   

[Mr Ian David Sharp]

Hi all,

Here’s an update on SS Cygni. I’ve been intensely monitoring the star for the last two outbursts and have made nearly 7,000 photometric measurements in the R and V bands in that time. It’s noticeable how variable the magnitude is especially during the dim portion of the cycle pre-outburst. Also, two very different widths of outburst.

See attached light curve from the photometry database.

Cheers
Ian.

Attachments:

1. 

   SS-Cyg-update.jpg
   

[Mr Ian David Sharp]

I’ve uploaded results from last night. Now slipping back to nearly mag 18 in V again.

Cheers
Ian

Attachments:

1. 

   UV-Per_mag18.png.jpg
   

[Mr Ian David Sharp]

Hi all,

Mag was 12.33 in V last night (05 Aug 2024) (average of 7 measurements).

Cheers
Ian.

Attachments:

1. 

   20240805_Z-UMI_V_PixelSkies-C11_IDS_plot_points.png
   

[Mr Ian David Sharp]

Hi all,

It’s a very slow decline, almost steady over the past 2 nights.

Cheers
Ian.

Attachments:

1. 

   V615_Vul_20240806_ids.jpg
   

[Mr Ian David Sharp]

A few more measurements in V uploaded this morning.

Cheers
Ian.

[Mr Ian David Sharp]

Hi all,

I uploaded a series of V mags to the database from last night. It was at around 10.7 V.

Cheers
Ian.

Attachments:

1. 

   20240801_N-VUL-2024_V_PixelSkies-C11_IDS_plot_points.png
   

[Mr Ian David Sharp]

Gary Poyner wrote:

Is this data merged with the 16.3V companion, or has that been extracted? Just curious.

Hi Gary,

Here’s a zoomed section of one of my images from last night when it was about magV 17.5 in AstroArt showing the 6,3,3 apertures used. The ref star on the right is the companion I think. It is number 4 in the list shown. This is 120 secs binned 2×2 with my C11 in Spain.

Tonight I’ll try with the L filter and go 180 secs.

Cheers
Ian.

Attachments:

1. 

   UV-Per-AA8.png
   

[Mr Ian David Sharp]

Gary Poyner wrote:

struggling with Covid – and feeling pretty sorry for myself.

Get well soon Gary!
Ian

[Mr Ian David Sharp]

Hi all,

I managed a time-series run again last night – see attached.

It’s now down around mag. 17.5 in V.

Cheers
Ian.

Attachments:

1. 

   20240801_UV-PER_V_PixelSkies-C11_IDS_plot_lines_check.png
   

[Mr Ian David Sharp]

Gary Poyner wrote:

That’s an interesting time series Ian. Quite an amplitude of variation during that rapid fade.

Hi Gary,

Yes, and the time series from Magnus is very similar. The faintness caught me out a bit last night and I only got a SNR of about 20, so tonight I’ll increase exposure a tad and try for another long run.

Cheers
Ian.

[Mr Ian David Sharp]

Hi Gary,

I managed a run of 106 images last night from here in Ham. It was swinging around 16.5 in V.

Graph attached, data in the database.

Cheers
Ian

Attachments:

1. 

   20240730_UV-PER_V_Ham-Observatory-Selsey-UK_IDS_plot_lines_check.png
   

[Mr Ian David Sharp]

Thanks Gary,

Will give it a go!

Cheers
Ian

[Mr Ian David Sharp]

I think last night (24/25 July) was the peak. I took another 6.5 hour run. Quite a bit of variability seen in the R and V plot.

Cheers
Ian.

• This reply was modified 1 year, 3 months ago by Mr Ian David Sharp.

Attachments:

1. 

   SS-Cyg-new-ob-3.png
   

2. 

   All_Plotted-2.png
   

[Mr Ian David Sharp]

Here is an update from last night where I imaged SS Cyg the whole night with 545 measurements in the R and V. It was at, or near its peak brightness.

Cheers
Ian

Attachments:

1. 

   SS-Cyg-new-ob-2.png
   

2. 

   All_Plotted-1.png
   

[Mr Ian David Sharp]

Hi Maxim,

I monitored it in R, V and B last night for over 2 hours and I found it was quite flat with only the B being slightly variable (as usual). See attached graph of last night’s results and also one with all my data since April.

Cheers
Ian.

Attachments:

1. 

   T-CrB-20240716.png
   

2. 

   T-CrB-All_to_20240716.png
   

[Mr Ian David Sharp]

Hi Steve,

Use the BatchFormatConversion script (in Script->Batch Processing to convert the xisf files TIF or FIT files etc. See the attached screen shot. You just need to type in the file extension and the format you want (for example 16-bit integer or whatever).

Never be tempted to prevent Pixinsight working with the incredibly powerful xisf file format otherwise you will lose a lot of other functionality such as the History Explorer. Just convert at the last moment when you need another file format.

Cheers
Ian.

Attachments:

1. 

   pi.jpg
   

[Mr Ian David Sharp]

Dr Paul Leyland wrote:

If you speak Perl, there’s a good chance that much of the scripting required can be provided.

Thanks Paul,

I have all the tools I need in my Python/AA8 system I have developed. I can query APASS/AAVSO/GAIA/Vizier in my Python code and match the results to the plate solved images in AA8.

Cheers
Ian.

[Mr Ian David Sharp]

Andy Wilson wrote:

The difficulty you may find is converting the output from HOPS into one of the file formats used by the BAA. If that is difficult, then don’t bother.

Hi Andy,

Yes, quite tricky! It’s the comparison stars that are hard to deal with. As far as I can see, exploring the various output files, the pixel co-ords of the comp stars are stored in the log.yaml file, but no details about them. I could locate them on a chart and then enter that data but it will certainly be fiddly!

Cheers
Ian.

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