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The ASDC SED Builder
Milvia Capalbi (INAF-ASDC)
in collaboration with
Paolo Giommi (ASI-ASDC), Giulia Stratta (INAF-ASDC),
Roberto Primavera (ElsagDatamat)
with some inputs from other scientists @ASDC
http://www.asdc.asi.it
SED Builder v1.3
WEB based application available at :
http://tools.asdc.asi.it/SED/
•MySQL database system
•Java code
•Query to ASDC catalogs and external catalogs/services
•Possibility to upload user data
•Manage private catalogs – login authentication, users can share own data
with a predefined group
In the following, I will show the main functionalities of the tool and the steps to
make it VO compliant.
Building a SED
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Input name or RA/Dec and search
radius in the query form
• Choose the catalogs in a set
covering the energy spectrum from
radio to gamma ray
• Click on ‘Load Data’ button
Radio catalogs
Choose the catalogs Gamma catalogs
KUEHR
PKSCAT90
DIXON
EGRET3
Infrared catalogs
BAT39MCAT (15-30keV)
BAT39MCAT (14-50keV)
GB6
SUMSS
AKARIPSC
Fermi1FGL (200 Mev)
NVSS
AKARIBSB
Fermi1FGL (600 Mev)
Fermi1FGL (2Gev)
FIRST
VLSS
X-Ray catalogs
Fermi1FGL (60Gev)
CRATES
PMN
WENSS
NORTH20CM (flux 20 cm)
NORTH20CM (flux 6 cm)
Fermi1FGL (6Gev)
IPCSLEW
IPC
RASS
IBISSG4CAT (20-40 keV)
IBISSG4CAT (40-100 eV)
AGILE Grid
WGACAT2
External services access
WMAP5 (Freq. 23e9)
WFCCAT
NED
WMAP5 (Freq. 33e9)
XRTDEEP
2Mass
WMAP5 (Freq. 41e9)
TWOXMMICAT
SDSS7
NORTH20CM (flux 80 cm)
WMAP5 (Freq. 61e9)
USNOB1
WMAP5 (Freq. 94e9)
USNO A2.0
Plot data and look at data tables
Overlay instrument sensitivity
Sensitivity of instruments collecting data from space and from ground (some Cherenkov
telescopes) can be added to the plot.
Fitting data
Data can be fit with a polynomial function (more functions to be added soon)
Draw a Model
An SSC model, analytical or numerical, can be added to the plot (computed
with model parameters input by the user). Different models can be added
and combined.
Luminosity scale
Y scale can be changed from Flux to Luminosity and frequencies from
observed to rest frame (Redshift to be provided).
Adding Templates
Templates (QSO or a giant elliptical galaxy spectrum) can be added to the plot
Plot options
•
The marker type, color and size for
each catalog can be chosen by the
user
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Change axis interval
Export data in an ascii file
Save image in PNG format
Background color can be changed
and others……….
Time filtering of data (still in devel area)
Making ASDC-SED VO compliant
Planned steps:
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Save data as VOTable
•
Change query to DB: access of data via VO protocols instead of
direct SQL access in our database
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Query the registry
–
Identify data useful to build a SED – via e.g. TAP
–
Get the necessary info to apply specific operations on data,
when needed (*)
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Communicate with other VO tools using the SAMP protocol
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In addition to the WebApp: develop a stand-alone tool (study phase)
First steps will be implemented by the end of the spring
Making ASDC-SED VO compliant
(*)
Currently
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some of the catalogs we use (mainly X-ray catalogs included in our
database) don’t contain flux information but count rates
•
we calculate the flux density using information on instrument
response and assuming a spectral model (and we correct for the
galactic absorption)
In the VO environment
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Querying the VO registry, we should get the necessary information to
calculate the flux density with instrument-specific functions (we
should support more missions/instruments)
Further improvement
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Allow the user to specify an energy index (e.g. to model the
spectrum used to determine the flux)
Summary
Current status
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current functionality of SED Builder shown
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the tool uses some catalogs containing instrument measurements
NOT in physical units
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the tool is used by some instrument teams (e.g. AGILE, Fermi, SwiftXRT) since we manage some password-protected catalogs
Future
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project to make the tool VO compliant
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we would like to find the best strategy to proceed and interoperate
with other VO tools
THANK YOU