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STARDEV  August 2006

STARDEV August 2006

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Subject:

Re: PLASTIC SPLAT

From:

"Peter W. Draper" <[log in to unmask]>

Reply-To:

Starlink development <[log in to unmask]>

Date:

Thu, 24 Aug 2006 12:57:58 +0100

Content-Type:

TEXT/PLAIN

Parts/Attachments:

Parts/Attachments

TEXT/PLAIN (69 lines)

On Wed, 23 Aug 2006, Mark Taylor wrote:

> I've added some PLASTICness to SPLAT.  What it can now do is:
> 
>    - receive spectra as 1-d FITS files
>    - receive spectra as VOTables
>    - transmit spectra as 1-d FITS files
>    - transmit spectra as VOTables
> 
> as well as the kind of generic functionality that you have in TOPCAT,
> including register/unregistser, start internal/external hub, 
> show a little window which displays currently registered applications.  
> All of this is controlled from the new Interop menu in the main 
> SPLAT control window.  The look and functionality of this menu are 
> very much the same as in TOPCAT.
> 
> There are an additional couple of checkboxes in this menu, to control
> whether you actually want to act on received "load 1-d FITS" and/or
> "load VOTable" messages, or just ignore them.  The rationale for 
> this is that in a PLASTIC context you might have a number of 
> "load VOTable" messages flying around which contain things that 
> aren't spectra (e.g. source catalogues), and hence are unsuitable 
> for SPLAT; if you turn this option off you can avoid being made 
> to load those.  Both checkboxes are currently set on by default 
> though.  I may add something similar to TOPCAT in fact, it seems 
> like a sensible option to have.  Future developments in the PLASTIC 
> protocol may provide ways of advertising one's services which make 
> getting sent unsuitable data like this less likely, but that's 
> not in place yet (or, probably, soon).

Hi Mark,

thanks that seems to be working for me, except I don't seem to be able to 
re-send a VOTable back to TOPCAT. I can send one from SPLAT to TOPCAT to 
SPLAT, but then I get an IOException when sending to TOPCAT (I'd guess 
this might be because the backing file has been deleted?).
 
> I have not yet written any documentation.  I can add a suitable section
> to sun243.tex if you like - tell me where in the document you'd like
> it to go.  In TOPCAT, the top-level Interop menu contains a
> "Help on Interoperability" item (since there's no window dedicated to
> to PLASTIC functionality, so no other context-sensitive help is going
> to lead there - TOPCAT may one day control its PLASTICity from a
> window, but not yet).  If you want, I can arrange the same for SPLAT.

Usually this would go in the "Help on window" page, but I've no objections 
to you just adding a section to SUN/243 and linking to that from the 
Interop menu, as in TOPCAT. Once you've done that I'll have a look at 
disseminating the information more widely in the docs.

> I think you want GAIA to be able to send this message having extracted a
> spectrum from a sky position on a cube.  Should be fairly 
> straightforward - either DIY or point me to the right place in GAIA
> (I haven't looked at cube stuff in it yet) and I can take a look.

Transmitting a spectrum from GAIA will need some more serious work yet. 
I need to add support for saving them to different formats, that's JAC 
work so I'll volunteer for it.

> I don't know if you want other formats of spectrum added for 
> send/receive - should be fairly easy to do if so.

Well, there's NDF and the SPLAT text format, but I guess we'll need some 
local message ids for them.

Cheers,

Peter.

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