Simple Spectral Access use cases

[posuna at iso.vilspa.esa.es]

Dear Doug,

here you have our 1-D spectral data as provided by our Archive
Scientists:


XMM-Newton 1D Scpectral Data
----------------------------


     - Data provider name
        ESA XMM Science Data Archive

      - Spectral data collections from this source
	1. automatic pipeline high-resolution spectra for the Reflection
           Grating Spectrometer (RGS) instrument
	2. medium resolution European Photon Imaging Camera (EPIC) spectra for
           each source of the XMM-Newton Serendipitous Source
           Catalogues, both automatically (pipeline) and interactively
           (XSA user interface) produced      - Characteristics of data
           (number of spectra, size, irregularly       
            sampled,nonsampled(as in HE/UV) multiple flux arrays,       
            variance arrays, etc.)

      - Characteristics of data (number of spectra, size, irregularly
        sampled,nonsampled (as in HE/UV) multiple flux arrays,
        variance arrays, etc.)

	1. 
	* Number of spectra (at the end of the mission): ~20000
 	* Size: ~50 KBytes each, ~4096 spectral channels, uniformly and
		  linearly sampled in energy
 	* Resolution: 200-800, in the energy range 0.35-2.5 keV
 	* Data structure: 1-D spectra in CHANNELS/COUNTS
 	* Type of data: background subtracted source and background
		  spectrum for the 1st and 2nd order. Spectra are **not** in
		  physical units, and need an observation dependent transfer
		  matrix(available through the XMM-Newton pipeline products) to
		  be analyzed. Fluxed spectra in physical units available as
		  well, but not usable for quantitative science analysis.

	2. 

 	* Number of spectra (at the end of the mission): ~1500000
 	* Size: ~30-200 KBytes each, 800-4096 spectral channels,
		  uniformly and linearly sampled in energy
 	* Resolution: 20-50, in the energy range 0.35-15 keV
 	* Type of data: source and background spectrum. Spectra are
		  **not** in physical units, and need an observation dependent
		  transfer matrix(**not** available through the XMM-Newton
		  pipeline products) to be analyzed. Plan to provide fluxes
		  spectra in physical units under study * Data structure: 1-D
		  spectra in CHANNELS/COUNTS * Tables: fluxes (in 5 different
		  energy bands), hardness ratios for each individual source

     - Current data storage format
        FITS

      - Is the data available online?
        Yes:
        a) Through a User Interface at:
           http://xsa.vilspa.esa.es/xsa/
        b) Through HTTP directly at:
           http://xsa.vilspa.esa.es:8080/aio/doc/   


      - Other comments



ISO 1D Spectral Data
--------------------

 

    - Data provider name
        ESA ISO Science Data Archive

      - Spectral data collections from this source
        ISO Data Archive (IDA)

      - Characteristics of data (number of spectra, size, irregularly
        sampled,nonsampled (as in HE/UV) multiple flux arrays,
        variance arrays, etc.)

        ~10,000 files, containing spectra at resolutions ranging
         from 40 to 30,000, in the wavelength range of 2.4 to 197
	 micron. Irregularly sampled. File size average 700 KB
	 (compressed).

      - Current data storage format
        FITS

      - Is the data available online?
        Yes:
        a) Through a User Interface at:
            http://www.iso.vilspa.esa.es/ida/
        b) Through HTTP directly at:
          http://pma.iso.vilspa.esa.es:8080/jsp/product.jsp?obsno=<>  


      - Other comments


Cheers,

Pedro.



-- 

Pedro Osuna Alcalaya


SOFTWARE Development Group
XMM-Newton Science Archive				
e-mail: Pedro.Osuna at esa.int
Tel + 34 91 8131314  				

European Space Agency
VILLAFRANCA Satellites Tracking Station
P.O. Box 50727 
E-28080 Villafranca del Castillo
MADRID - SPAIN




On Wed, 18 Jun 2003 21:14:28 -0600 (MDT)
Doug Tody <dtody at nrao.edu> wrote:

> At the IVOA meeting in Cambridge a few weeks ago, one of the highest
> priority projects identified for the DAL working group was to define a
> "simple spectral access" protocol for accessing 1D spectra and SEDs.
> 
> To help plan this effort it would help to get a better idea of how
> such an interface would initially be used.  If you think you or your
> institution might provide 1D spectral data or SEDs to the VO, or might
> provide software to use such data provided by the VO (e.g., as an
> addition to an existing VO demo or by interfacing some analysis
> application), please fill in the following form and return it to
> dal at ivoa.net.  Note doing so is not a committment to actually do any
> work!  We mainly just want to get a better idea of what spectral data
> collections are out there, to help design the spectral data interface.
>  Thanks very much for your help with this.
> 
> Doug Tody (dtody at nrao.edu), Markus Dolensky (Markus.Dolensky at eso.org)
> 
> 
> Simple Spectral Access Use Cases
> 
> Data Providers (e.g., data centers, archives)
> 
>     - Data provider name
> 
>     - Spectral data collections from this source
> 
>     - Characteristics of data (number of spectra, size, irregularly
>     sampled,
>       nonsampled (as in HE/UV) multiple flux arrays, variance arrays,
>       etc.)
> 
>     - Current data storage format
> 
>     - Is the data available online?
> 
>     - Other comments
> 
> 
> Data Consumers (e.g., analysis packages, e.g., VO demonstrations that
> might want to add the ability to fetch and display a spectrum)
> 
>     - Name of application, package, demo, etc.
> 
>     - Summarize capabilities of software
> 
>     - Desired characteristics of input data
> 
>     - Desired input data format or formats (e.g., graphics, FITS, XML)
> 
>     - Other comments
> 
> 
> General Comments 
> 
>