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#1 inZet

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Posted 19 April 2012 - 09:00 AM

Hi Folks,

here is my own site, the Double Stars Database: an interface to the Washington Double Stars Catalog (WDS).

Double Stars Database

I wrote it from scratch because I never felt comfortable with the Aladdin interface and searching information from the WDS datafile.
My goals are easy to use, data accuracy and completeness.

I just completed the translation to English (I'm Italian), I need help if you like. Please report me if you find something wrong.

My suggestion is to register and login to use all the features like data filtering based on your telescope's capability.

Thank you for your time.

Gianluca Sordiglioni

#2 dedo

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Posted 19 April 2012 - 12:57 PM

Bravo Gianluca!

To me it doesn't save the instrument parameters under Setup/Preferences. I'm using the latest Firefox browser.
Don't know if it's a bug or a problem with my own configuration.

Andrea

#3 7331Peg

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Posted 20 April 2012 - 01:38 AM

That is an excellent tool, Gianluca. I just added a link to it here on a double star blog I write with Greg Stone.

Grazie!


John Nanson :refractor:

#4 inZet

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Posted 20 April 2012 - 06:04 AM

To me it doesn't save the instrument parameters under Setup/Preferences. I'm using the latest Firefox browser.
Don't know if it's a bug or a problem with my own configuration.


Bug fixed. Thank you!

#5 inZet

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Posted 20 April 2012 - 06:06 AM

Nice blog, John!

#6 Zul

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Posted 21 April 2012 - 02:24 AM

Fantastic stuff!

#7 JIMZ7

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Posted 21 April 2012 - 07:17 AM

Thanks--the best double star database I've ever seen!

Jim :refractor:

#8 azure1961p

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Posted 21 April 2012 - 07:27 AM

Finally finally finally. Why the WDS. Didnt have such a search engine incorporated into theur site is beyond words. Ive bookmarked this and cant thank you enough. Brilliantly done.


Pete

#9 MikeMcCaskey

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Posted 21 April 2012 - 07:37 AM

Absolutely wonderful! This makes my planning much more efficient and helps this noob to recognize what I'm looking for when I see it! :bow: :bow: :bow:

#10 WRAK

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Posted 21 April 2012 - 02:29 PM

Great job. Could not figure out the format of the input for "separation between" - how do you enter for example 1 to 25 arcseconds?
Wilfried

#11 desertstars

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Posted 21 April 2012 - 05:21 PM

Very nicely done! Congratulations, and thanks!

#12 PJ Anway

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Posted 21 April 2012 - 10:35 PM

Excellent+++ Gianluca!!!
Something that was very needed by double star enthusiasts. Thanks so much for all the hard work.

#13 inZet

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Posted 23 April 2012 - 06:07 PM

Thank you so much for your kindly comments.
If there will be enought interest I'll continue to develop new features. For example, inputting reports and measures is quite "basic". Images uploads. Visual simulation. And of course more debugging (I'm aware there is something on "PA now", "RA now" and graph to investingate when orbiting period is expressed in days).

@WRAK: you can't do it right now :-) I disabled this feature. My JavaScript solution was unstable/not compatible with all browsers. It's not my top priority, I'll not spend more time on this issue for a while.
Your question gives me the information you used the Advanced Search feature. Very good!

#14 drollere

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Posted 01 May 2012 - 08:13 PM

i cannot successfully register; i get "username: -10"

once debugged you should approach bill hartkopf or brian mason with this utility; if comments above can be trusted, they would welcome it.

#15 inZet

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Posted 02 May 2012 - 06:51 AM

Fixed. Thank you Bruce.

A side effect of the Double Stars Database development is I'm forced to check my data, including the WDS. I send email regularly to Brian Mason and he always kindly reply me. Last time I submitted 1600+ magnitude errors on multiple systems.
I think he is aware of this site.

#16 exile

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Posted 02 May 2012 - 11:40 AM

Thank you very much, Luke. Great site :bow:

#17 drollere

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Posted 02 May 2012 - 12:53 PM

A side effect of the Double Stars Database development is I'm forced to check my data, including the WDS. I send email regularly to Brian Mason and he always kindly reply me. Last time I submitted 1600+ magnitude errors on multiple systems.


well, bad on them if they don't ask to have it supported via the .gov domain. after all, they control the data.

if what you're calling magnitude errors are discrepancies in the pairwise entries (e.g., AB gives A as 5.0, AC gives A as 5.3) then yes, there are many of those in WDS. unavoidable, since they are typically measures made by different observers, instruments and equipment at different epochs.

i have to do quite a lot of cleaning and cross checking when i prepare my spreadsheet version of WDS, which i do about once a year. i don't mind that, because cleaning is a form of editing (censoring, adjudicating, overwriting) and it's better to have the unedited data always at hand. however it creates unique challenges for a query tool.

thanks for the fix. the lists i examined (including my wm. herschel attributions) look great. i realize that you have a lot on your plate. but an FAQ that explains how to create custom lists would be very helpful.

i worked with SQL PERL query/browser programmers during my internet years and i know what is involved under the hood.

good on ya!

#18 inZet

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Posted 04 May 2012 - 06:44 AM

@exile: thank you.

@drollere

well, bad on them if they don't ask to have it supported via the .gov domain. after all, they control the data.

and also azure1961p:
If you issue a "diff" command from one WDS file to another taken in another date, you see so much differencies! At USNO they have a lot to work to do. I think they have no time nor resources left to maintain a search engine. All professional astronomers use Simbad/Aladin/VizieR and that's enought for them. But those tools are not intended for amateur astronomers, and not for double stars works: these are general-purpose search tools expecially good for cross-reference catalogs.
If they will ask me to support them, we will see. For now, it's me to be "beared" by them with my petulant error reports... :-)

if what you're calling magnitude errors are discrepancies in the pairwise entries (e.g., AB gives A as 5.0, AC gives A as 5.3) then yes, there are many of those in WDS. unavoidable, since they are typically measures made by different observers, instruments and equipment at different epochs.

yes, it's like what you're saying, but there's more.
A double A was discovered to be Aa: the magnitude reported was in a case the single A flux, in other cases the combined A+a flux, in random order.
In my software I already split in single components all the stars, so it was easy to check them all and compare each other. A week of work, during my Christmas' holidays.
And now errors are detected and corrected. :-)

i have to do quite a lot of cleaning and cross checking when i prepare my spreadsheet version of WDS, which i do about once a year. i don't mind that, because cleaning is a form of editing (censoring, adjudicating, overwriting) and it's better to have the unedited data always at hand. however it creates unique challenges for a query tool.

Check the tool to create your own lists. It's enought powerful in your opinion?

thanks for the fix. the lists i examined (including my wm. herschel attributions) look great. i realize that you have a lot on your plate. but an FAQ that explains how to create custom lists would be very helpful.

Did you found difficulties or misunderstanding?

#19 inZet

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Posted 06 July 2012 - 03:06 PM

Folks,

I updated the DSD database to the latest WDS release, on july 6.

There's a new software version online, with some bugs fixed and other minor changes.

Bye,
Gianluca

#20 MikeMcCaskey

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Posted 06 July 2012 - 03:25 PM

Am I the only one that has trouble downloading the WDS catalog?

Sometimes, I am sooo technically challenged! :bangbangbang:

#21 nomosnow

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Posted 08 July 2012 - 05:47 PM

Post deleted by nomosnow

#22 nomosnow

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Posted 08 July 2012 - 05:51 PM

Gianluca...a great site , thankyou for all your efforts. I find it easy to use and a real time saver when looking up double stars.
Also it is nice to have a spot where my measurements can be entered.

#23 Kon Dealer

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Posted 09 July 2012 - 03:46 AM

Much appreciated Gianluca.
SAOs as well :)

#24 inZet

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Posted 22 September 2012 - 06:32 AM

I updated the database to the lastest WDS version.
Minor bugs where fixed. For example, one did not allowed to show the menus until you refreshed the page. :foreheadslap:

Minor issues still exists in data visualization, related to graphs. I'll fix them as soon as I can get some free time.

In the meantime, I wrote an article on "Double Star Bulletin" (Il Bollettino delle Stelle Doppie) issue #2, an Italian new online pubblication.
If you are interested to how many problems I encountered writing this software and how I solved them, an english version of the article is available, translated by me.
Il Bollettino delle Stelle Doppie

Bye!

#25 drollere

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Posted 22 September 2012 - 01:15 PM

molto bene!






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