[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 3 months, 4 weeks 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.

[Mr Ian David Sharp]

Here are my results from last night. Moved to an L filter, 120s. I tried some period fits, but wasn’t convinced!

Cheers
Ian.

Attachments:

1. 

   tycho.jpg
   

[Mr Ian David Sharp]

Yes you can.

Use the “Bulk Edit Live Observations” button on the database home page. Then Filter for your bad observations. Then, you will be able to update their status as Deleted. See attached.

Cheers
Ian.

Attachments:

1. 

   Bulk_Edit.jpg
   

[Mr Ian David Sharp]

I took a longer run last night, about 2h 20m, and used 300s exposures in a V filter to beef up my S/N to about 60 (I was taking 180s).

A bit of variability over 0.2 mags, but no pattern to it as far as I can see. Average V mag. is 16.8.

Cheers
Ian.

Attachments:

1. 

   20240703_TCP-J200237033947002_V_PixelSkies-C11_IDS_plot_points.png
   

[Mr Ian David Sharp]

Maxim Usatov wrote:

Looks like the system is bright at about 10.8 – 10.6 V mag and quite active. (Please ignore dim measurements – I think clouds interfered, so the whole ensemble was skewed. I will avoid submitting that to the database.) Can anyone confirm?

Max

Hi Max,

Looks like business as usual. Here are my V results from last night and also all my obs. since April. No major changes going on as far as I can tell.

Cheers
Ian

Attachments:

1. 

   20240702_T-CRB_V_PixelSkies-C11_IDS_plot_points.png
   

2. 

   TCrB.jpg
   

[Mr Ian David Sharp]

Mr Ian David Sharp wrote:

I took a series of 17 exposures early this morning from my C11 in Spain over an hour. It varied at between 16.7 and 16.8 in the V band. See attached.

Sorry, here’s the graph which I neglected to attach!

Attachments:

1. 

   20240702_TCP-J200237033947002_V_PixelSkies-C11_IDS_plot_lines.png
   

[Mr Ian David Sharp]

Hi all,

I took a series of 17 exposures early this morning from my C11 in Spain over an hour. It varied at between 16.7 and 16.8 in the V band. See attached.

I’ve also attached a screen shot with the field in AstroArt with the 5 ref and one check star I used. All the comp stars came from the AAVSO chart X36870MV.

WE have 2 entries in the BAA photometry database – one for TCP J20023703+3947002 and one for AT 2024lwu and I’ve uploaded my results to both. As Magnus mentions above, the AAVSO use TCP J20023703+3947002 in VSX.

Cheers
Ian.

Attachments:

1. 

   Screenshot-2024-07-02-081243.jpg
   

[Mr Ian David Sharp]

Maxim Usatov wrote:

Great multi-band series, Ian!

Thanks Max!

It’s still very quiet…

Ian.

Attachments:

1. 

   TCrb_Max-1.jpg
   

[Mr Ian David Sharp]

Well, the outburst is definitely over, and much narrower that the previous one. See attached.

Cheers
Ian.

Attachments:

1. 

   ss_cyg_all_over.jpg
   

[Mr Ian David Sharp]

Hi Max,

Here are my results from last night. I’ll try and get longer runs tonight.

Cheers
Ian.

Attachments:

1. 

   TCrb_Max.jpg
   

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