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 almost 11 years ago. Updated about 10 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 over 10 years ago

  • Assigned To set to Louge Thierry

#2 Updated by Knödlseder Jürgen over 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 about 10 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 about 10 years ago

  • Due date set to 12/31/2014

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