Action #1170

Feature #591: Investigate how GammaLib can be made VO compliant.

Add object to coordinate transformation using VO services to GSkyDir

Added by Knödlseder Jürgen about 10 years ago. Updated over 9 years ago.

Status:NewStart date:03/12/2014
Priority:HighDue date:12/31/2014
Assigned To:Louge Thierry% Done:

0%

Category:-
Target version:-
Duration: 295

Description

A method should be added that allows conversion of an object name to a sky coordinate, making use of Virtual Observatory services. For example:

GSkyDir dir("Crab");

should create a sky direction object that is initialised to the location of the Crab nebula.

Virtual Observatory services should be used to do the coordinate transformation. This may fail if:
  • the user is not connected to the web
  • the name is not know to the service

On both cases, exceptions should be thrown.

It can also be envisioned to hard-code a reduced list of coordinates for well-known gamma-ray emitters. The hard coding could be done within the code, or by providing a file (e.g. FITS file) that is shipped with the system.

Recurrence

No recurrence.

History

#1 Updated by Knödlseder Jürgen almost 10 years ago

  • Assigned To set to Louge Thierry

#2 Updated by Knödlseder Jürgen almost 10 years ago

Here an example how the problem can be solved in IDL: http://idlastro.gsfc.nasa.gov/ftp/pro/sockets/querysimbad.pro

For testing, this query works:

http://cdsweb.u-strasbg.fr/cgi-bin/nph-sesame?Crab
and returns a pretty short string
# Crab    #Q1911886

#=S=Simbad (via url):    1
%@ 795871
%I.0 M 1
%C.0 SNR
%C.N0 13.13.00.00
%J 83.633083 +22.014500 = 05:34:31.93 +22:00:52.2
%J.E [~ ~ ~] C 2011A&A...533A..10L
%D 7 5 90 (32767) (R) E 2009BASI...37...45G
%#B 4511

#====Done (2014-Jun-19,13:53:40z)====
(see http://cdsweb.u-strasbg.fr/doc/sesame.htx).

#3 Updated by Knödlseder Jürgen over 9 years ago

  • Priority changed from Normal to High

Any progress here? We should get this working, even if the VO query is hard wired.

#4 Updated by Knödlseder Jürgen over 9 years ago

  • Due date set to 12/31/2014

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