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ASAS-SN

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Gustav Holmberg
ASAS-SN

I am interested in analysing data from ASAS-SN but have not been able to import data to Vstar. Any ideas?

/Gustav

CTX
CTX's picture
All Sky Automated Survey

Of course, after the other responses, I realized that I mis-read the question..... geezzz, but glad it all worked out for Gustav.

To the best of my knowledge “ASAS-SN” references the All Sky Automated Survey for SuperNovae (aka “ASAS-SN).

Typical Transiet object designations are ASASSN-YRxx where YR is the two digit year ending and xx is a sequential alpha naming progression.  If you check the Transients web page the current listing, at the top of the page is for ASASSN-17qn, as an example:

http://www.astronomy.ohio-state.edu/~assassin/transients.html

Data Based objects of the AAVSO can always be checked via the VSX.  If it does not appear there then it is not in the data base and there is a method therein to request inclusion:

https://www.aavso.org/vsx/

Tim Crawford, CTX

Sequence Team

David Benn
David Benn's picture
Not to worry :)

No worries Tim. Useful information anyway. laugh

David

Gustav Holmberg
I was thinking of analysing

I was thinking of analysing data like this, for example, using Vstar. There's an export option using csv format, but when I try to load that into Vstar it doesn't work.

/Gustav

WGR
WGR's picture
CSV data to Vstar

Hello Gustav

I export data to Vstar very often.  I believe that Vstar only wants a JD and a magnitude.  If you are exporting more that this, it might be the problem.

 

Gary

David Benn
David Benn's picture
ASAS-SN observation source plug-in

Hi all

Thanks for your input Gary and Tim.

Gustav, after reading your post, I wrote a ASAS-SN observation source plug-in while on my daily bus commute today and finished/tested it this evening after work (it's almost midnight here in South Australia). cool

I've attached a zip file containing all current plug-ins plus the new ASAS-SN plugin. You can install it by creating a temporary directory, unzipping the zip file into that directory and either:

I've carried out minimal testing so far: on the dataset you pointed to above and a random one I searched for and downloaded on the ASAS-SN web page.

I'm handling the 5-sigma limit (see pages 4, 5 of http://iopscience.iop.org/article/10.1088/1538-3873/aa80d9/pdf) referenced on https://asas-sn.osu.edu by using a separate series for such observations. In addition, any observation for which the mag and mag_err are both 99.99, the plug-in ignores. Let me know if you think different series colours should be used. The main series is V as I understand it, hence the colour.

Once more testing (e.g. by you and others) has been carried out and a simple how-to guide has been written, the plug-in will be made available in the AAVSO plug-in repository. 

Please give it a try and let me know how it goes. A new item will appear in the File menu.

David

Gustav Holmberg
It works like a charm!

It works! I installed the new batch of plugins in a temporary directory, pointed to it in preferences/plugin-in settings/ and installed the ASAS-SN plugin. Then I have been able to load ASAS-SN datasets in Vstar.

Many thanks for the quick response, making the already great Vstar an even better tool for variable star astronomy. Great!

/Gustav

David Benn
David Benn's picture
Great

Hi Gustav

That’s excellent and thanks for your kind words. :)

Let me know if you see any problems.

If you want to use the standard online plugin library again, just click the Set Defaults in the plug-in settings preferences pane.

David

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