[Mr Ian David Sharp]

Hi all,

I managed a few measurements last night. The slow fade continues.

Cheers
Ian.

Attachments:

1. 

   V615_Vul_20240821_ids.jpg
   

[Mr Ian David Sharp]

Hi all,

A real drop in brightness, much fainter tonight. Here are 50 more measurements from here in the UK.

Cheers
Ian.

Attachments:

1. 

   UZ-Boo-20240820.jpg
   

[Mr Ian David Sharp]

Hi all,

I managed 39, 120s exposures last night from here in the South of the UK. The sky was very milky due to the Canadian wildfires, so the quality was not as I had hoped. Graph attached and data in BAA and AAVSO databases.

Cheers
Ian.

• This reply was modified 12 months ago by Mr Ian David Sharp.

Attachments:

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   UZ-Boo-20240818.jpg
   

[Mr Ian David Sharp]

Another update, nearly 10,000 brightness measurements in the last two outbursts.

There are some fascinating details in the variability within the daily bursts of measurements. I need to analyse them further to see what they contain.

Cheers
Ian

Attachments:

1. 

   SS_Cyg_18th_Aug.jpg
   

[Mr Ian David Sharp]

Hi all,

I managed 18 decent measurements in V last night with SNR around 150 and the average was 12.87 – see attached.

Cheers
Ian.

Attachments:

1. 

   20240816_UZ-BOO_V_Ham-Observatory-Selsey-UK_IDS_plot_points.png
   

2. 

   UZ-BOO-20240817.jpg
   

[Mr Ian David Sharp]

Here are my measurements from a few minutes ago in Spain.

Average of 15 V images = 12.51

Cheers
Ian.

Attachments:

1. 

   20240810_UZ-BOO_V_PixelSkies-C11_IDS_plot_points.png
   

[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

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