[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
   

[Mr Ian David Sharp]

Hi all,

Looks like the recent outburst is, all but, over. An interesting divergence of the R and V magnitudes as it faded. See attached.

Cheers
Ian.

Attachments:

1. 

   T-CrB.jpg
   

[Mr Ian David Sharp]

Maxim Usatov wrote:

T CrB oscillations tonight.

Hi Maxim,

Yes, I see considerable variability (and variability of variability night on night!). You can see the vertical spread over each night on this plot. I usually take 40 to 60 images per filter per night. It’s hard to display as the points get very bunched and I would have to expand just one or two nights to see the details.

Also, overall since April, T CrB has been quite steady especially in the past two or three weeks.

Cheers
Ian.

Attachments:

1. 

   T-CrB-variability.png
   

[Mr Ian David Sharp]

Good morning,

I’m pleased to report I haven’t missed a night in both V and R since the outburst. Here’s the light curve to date.

Cheers
Ian.

Attachments:

1. 

   ss_cyg_baa_lc.png
   

[Mr Ian David Sharp]

From the album: “There is no dark side of the Moon really – as a matter of fact it’s all dark”

[Mr Ian David Sharp]

Thanks Jeremy!

I’ve added a batch of R and V from last night. Looks like it’s at, or near to its peak.

Cheers
Ian.

Attachments:

1. 

   ss_cyg_baa_out3.png
   

2. 

   ss_cyg_baa_out4.png
   

[Mr Ian David Sharp]

Now all my R and V data from last night is in the database. Here’s a zoom in to it.

Ian.

Attachments:

1. 

   ss_cyg_baa_out2.png
   

[Mr Ian David Sharp]

Mr Ian David Sharp wrote:

I’ve processed one set of V and one of V so far.

Should be R and V – sorry.
Ian

[Author]

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