Download Slide 1

Обзор астрофизических задач,
решаемых средствами IVOA
Astrogrid 2: Cycle 3
(Jan 2006 – Jul 2006)

Key aim:


To have 200 astronomers – users of AG by
mid of 2006
5 papers to journals (real science)
Cycle 3: goals (I)

Provide stable access to 4 common science
services





Redshift Maker (WFS, WFCAM, SDSS)
Colour Cutter (WFS, WFCAM, Vizier)
Solar Movie Maker (Trace, CDS, EIT)
Astroscope (Chandra, Spitzer,SDSS, HST)
Provide examples of simple actions that an
astronomer can perform with the system
Cycle 3: goals (II)

Generate a library of simple annotated workflows





selecting data
querying common catalogs
simple use of complex tools
simple scripting examples
Focus on three science themes



BiSON
Deep Field (HST, MERLIN/VLA/EVN/WSRT, ISO, SCUBA,
CHANDRA )
Gould Belt (GLIMPSE, UVES, Scuba, HARPB,
NVSS, SpecFind, Maser Surveys)
THE US NATIONAL VIRTUAL OBSERVATORY
«100» Scientific Questions for the NVO
A.The problem of heterogenous filters
•Locate all B, U, & V photometric measurements of dwarf galaxies within 50 Mpc of the Earth, segregating images from
catalog values.
•For the measurements returned in 1., find the technical descriptions of the various filters used and join results. Group
listing by publication and telescope.
B. Incorporating Literature Resources
•List all interferometric spectral line observations of SiO since 1990.
•List all published observations of SiO in bi-polar outflow sources since 1990. (published=observations have resulted in
published paper)
•Of the observations found in 4., which have images or spectra publicly available?
C. Using Object classifications in image searches
•Find all images of molecular clouds within 30 arcminutes of HII regions from a given sample.
•Retrieve all images of non-thermal, polarized sources within 500 pc of the Galactic Center.
•Of the items found in 7. which are thread-like?
•Given a list of galactic, non-thermal sources, located the N (e.g. three) closest (in angular distance) thermal radio
continuum sources and the N closest molecular clouds.
THE US NATIONAL VIRTUAL OBSERVATORY
SDSS
Q2: Find all galaxies with blue surface brightness between and 23 and 25 magnitude per square arcseconds,
and super galactic latitude (sgb) between (-10º, 10º), and declination less than zero.
Q3: Find all galaxies brighter than magnitude 22, where the local extinction is >0.175.
Q4: Find galaxies with an isophotal surface brightness (SB) larger than 24 in the red band, with an
ellipticity>0.5, and with the major axis of the ellipse between 30” and 60”arc seconds (a large galaxy).
Q6: Find galaxies that are blended with a star and output the deblended galaxy magnitudes.
Q7: Provide a list of star-like objects that are 1% rare.
Q9: Find quasars with a line width >2000 km/s and 2.5<redshift<2.7.
Q11: Find all elliptical galaxies with spectra that have an anomalous emission line.
Q12: Create a grided count of galaxies with u-g>1 and r<21.5 over -5<declination<5, and 175<right
ascension<185, on a grid of 2’ arc minutes. Create a map of masks over the same grid.
Q14: Find stars with multiple measurements that have magnitude variations >0.1.
Q15: Provide a list of moving objects consistent with an asteroid.
Q16: Find all objects similar to the colors of a quasar at 5.5<redshift<6.5.
Q17: Find binary stars where at least one of them has the colors of a white dwarf.
Q20: For each galaxy in the LRG data set (Luminous Red Galaxy), in 160<right ascension<170, count of
galaxies within 30"of it that have a photoZ within 0.05 of that galaxy.
VO prototypes
Gamma-Ray Burst Follow-Up
Service Science Prototype
Brown Dwarf Search Science
Prototype: Real-Time Cross
Matching of Large Catalogs
Galaxy Morphology Science
Prototype: A Case Study in Grid
Computing
NVO services
 NVO Registry (http://nvo.stsci.edu/VORegistry/index.aspx) - Browse NVO-Ready
Data Collections to locate source catalogs, image archives, and other astronomical
resources registered with the NVO
DataScope (http://heasarc.gsfc.nasa.gov/cgi-bin/vo/datascope/init.pl) - Discover
and Explore Data in the Virtual Observatory from archives and data centers around the
world
Quick Region Inventory (http://irsa.ipac.caltech.edu/applications/QuickStats/) View Catalog Coverage Maps and Source Inventories for the position or object name you
are interested in
Open SkyQuery (http://openskyquery.net/Sky/skysite/) - Query Databases and
Cross-Match Object Lists from some of the largest on-line catalogs in astronomy
WESIX (http://nvogre.phyast.pitt.edu:8080/wesix/) - Perform Source Extraction and
Object Identification by detecting objects in your own images and matching them with
objects in the major survey catalogs
VOEventNet (http://voeventnet.caltech.edu/GCN.html) - Explore the Multiwavelength
Sky in the Vicinity of Transient Events that have recently been observed
Repair Image Coordinates in images with inaccurate or misaligned coordinate
systems. NOAO WCS fixer (http://nvo.noao.edu/wcsfixer/)| Pittsburgh WCS fixer
(http://nvogre.phyast.pitt.edu/wcs/)
 Make mosaics from 2MASS, DPOSS, or SDSS images (Montage).
TeraGrid
The NVO has proposed to initiate the process whereby the computational
resources of the NSF TeraGrid project can be combined with the NVO to
enable astronomers to explore and analyze these new data sets in order to
understand the physical processes that drive the formation and evolution of
our universe
(1) expose massive data to massive computing through NVO protocols,
(2) run representative applications to explore that data,
(3) foster new projects in astronomy that use NVO services and TeraGrid
resources,
(4) encourage new ways to use supercomputing facilities for science.
Atlasmaker: A Grid-based Implementation of the Hyperatlas
Resolving star formation in galaxies
Montage
Fitting Quasar Spectra
N-Point Correlation Functions of Galaxies
The Cosmic Microwave Background Grid
NVO Grants
 Finding and Exploring Merging Pairs of Galaxies in 2MASS Using the NVO
 An Image Pipeline for Supernovae Detection
 A Search for Dusty Halos Around Post-Starburst Galaxies
 Redshift X-Ray Galaxies from SDSS and ROSAT PSPC Pointed Observations: The Catalog and
Initial Applications to AGN-Starburst Connections
 Incorporating Time-Series Datasets into the VO to Use RR Lyrae and Other Tracer Populations for a
Large Scale Galactic Structure Study
 Utilizing Catalog Cross-Matching for Discovery and Study of Quasars
 Detecting Embedded Intermediate Mass Stars Using the NVO
 Archiving the Red Sequence Cluster Survey and Quasar Environment at z = 1 using NVO tools.
 Multiwavelength Exploration of a Complete Sample of Steep Spectrum Sources from the Texas
Interferometer Survey: A Database Incorporating VLA 20cm Snapshots
 Simulatneous Multicolor Detection of Objects Using the Virtual Observatory
 Photometric Redshifts and Galaxy Cluster Finding with the NVO
 Mapping the Virtual Universe
 Enabling Follow-Up Observations of Supernovae: Sky Transient Event Infrastructure
 Charting the Milky Way Halo with GALEX and SDSS RR Lyrae Candidates
 Large Area Multiwavelength Characterization of Faint VLA FIRST Radio Sources See in the Spitzer
SWIRE Survey
 NVO Study of Super Star Clusters in Nearby Galaxies
Plans
A number of components that are under active development and that we
expect to be included in subsequent requests for TeraGrid resources.
•On-Demand Services
•Image Federation
•Data Mining Services
•Theory-Observation Interface
Science Problems
(http://wiki.astrogrid.org/bin/view/VO/ScienceProblemList)
ActiveGalaxiesUnbiasedStudy
AGBstarCandidates
ActiveStarProperMotions
BrownDwarfSelection [ AG Core ]
ClassifyXraySourcePopulation
ComplexObjectIdentification
DeepFieldSurveys [ AG Core ]
DynamicsofAGNandStarburstNuclei
GalacticMaserFaradayRotation
GalaxyClustering [ AG Core ]
GammaRayBursterLocalisation
GetGalaxyRedshift
HaloWhiteDwarfs
HiZQuasars [ AG Core ]
LowSurfaceBrightnessGalaxyDiscovery [ AG Core ]
OpticalNearIRGalaxyClusterSelection [ AG Core ]
PreDiscoveryMiningSN
QuasarHostGalaxiesBlackHoleMasses
SpectralEnergyDistributions
StarFormingRegionStructure
SupernovaGalaxyEnvironment [ AG Core ]
AstroGrid Science Problems - 'The AstroGrid Ten'
BrownDwarfSelection
imaging
DeepFieldSurveys
imaging, radio, multilambda
GalaxyClustering
imaging, algorithms
HiZQuasars
imaging, spectral
LowSurfaceBrightnessGalaxyDiscovery
images, alogorithms
MagneticStormOnset
STP
SolarCoronalWaves
solar
SolarStellarFlareComparison
astro, solar
STPSolarEventCoincidence
solar, STP
SupernovaGalaxyEnvironment
imaging, spectral
AstroGrid Science Themes
create a framework in which user defined science cases
can be developed, building upon the science services and
data/tool access capabilities present in the system.
Multi-Lambda imaging
This builds on the Top Ten cases: Deep Field surveys, HiZ Quasars
Science service: redshift maker
Examplar case: clusters at 0.5 < z < 1.5 from UKIDSS data
Stellar Populations
This builds on the brown dwarf selection case
Science service: colour cutter
Examplar case: Gould Belt objects, IMF in clusters
Morphologies
This builds on the LSB galaxy discovery case
Exemplar case: HII, SNR and PN in Ha surveys
Extreme Objects
This builds on the SN environment case
Science service: astroscope
Examplar case: GRB alert data integration
Sun Earth-Connection
This builds on the solar/STP cases
Science service: solar movie maker
Exemplar case: CME - Magnetosphere connection
Plans
A major initial driver for the AG project was to support the effective
scientific exploitation of major projects emerging in the 2003-2005 time
frame, with particular emphasis on the VISTA project.
The capabilities now planned for AG-2 aim to meet the demands of other
projects identified by PPARC's Science Committee as being of high
scientific importance to the UK community.
•exploitation of the UK's investment in European Southern Observatory (ESO)
(now)
•the two Gemini telescopes (now)
•XMM-Newton (now)
•SWIFT (late 2003)
•WFCAM (2004)
•VISTA (2006)
•e-MERLIN(2007)
•Herschel (2007)
•Planck (2007)
•ALMA (2008-10)
•GAIA (2010-12)
•JWST (>2010)
•Xeus (>2012)
Plans
Science Drivers from Herschel
Galaxy formation and evolution in early universe and the nature of active galaxies
Star forming regions and interstellar medium physics in Milky Way and external galaxies
Molecular chemistry of cometary, planetary and satellite atmospheres in solar system
Science areas like these will require the use of the capabilities of VOs and AG2 in
particular to enable access to complementary data sets at all wavelengths from
radio to X-ray and beyond. Science priorities such as probing protoplanetary discs
and star-forming regions, or investigating Ultra Luminous IR Galaxies and testing
cosmological theories against the properties of high-redshift objects, involve regions
which are heavily obscured by dust or which are most securely and rapidly identified
using the broadest spectral energy distribution
Towards the Euor-VO: Delivering the AVO Science Reference Mission.
Solar System Research
With the incorporation of the UKSSVO project into the AGproject a number
of Solar and STP prioriteis will be addressed. These will include:
investigating basic plasma processes such as magnetic reconnection on
multiple scales: from solar flares, flaring in active galactic nuclei, to
magnetospheric reconnection.
Plans
Facilitating New Ways of Working
Topic specific workspaces, giving access to all data and
tools relevant to a certain astrophysical problem.
Aided work-flows, where the user constructs a
personalised data pipeline, using VO components, and in a
manner where the system provides sophisticated
guidance.
Methods whereby the outputs of data manipulations can
be automatically fed back into the operations of
telescopes, both for real-time and ordinary observational
programmes.
Advanced ways of visualising and exploring multi-channel
data.
The VOTech project is divided up into a set of Design Study areas
DS1: DesignStudyManagement
DS2: TechnicalProjectManagement
DS3: InfraStructure
DS4: UserTools
(http://wiki.eurovotech.org/bin/view/VOTech/AvoSrmAnalysis)
DS5: ResourceDiscovery
DS6: DataExploration (Data Mining and Visualization)
StageOne (Jan 2005 - Sep 2005)
StageTwo (Oct 2005 - Mar 2006)
StageThree (Apr 2006 - Sep 2006)
StageFour (Oct 2006 - Mar 2007)
Science Reference Missions
S1 Circumstellar disks: from pre-Main Sequence stars to stars harbouring planets
S2 Intermediate Velocity Clouds
S3 Which star will go Supernova next?
S4 Initial Mass Function within 1 kpc: from planetary to stellar masses
S5 Initial Mass Function for massive stars
S6 The contribution from low and intermediate mass stars to the interstellar medium
S7 Galaxy Formation and Evolution from z = 10 to z = 0.1
S8 Build-up of supermassive black holes
List of Tools
#
Tool
T1
multi-waveband image tool
T2
best fitting
T3
SED builder from archival data
T4
positional cross matcher
T5
access to theoretical data
T6
robotic telescope interface
T7
generic source extraction
Scenarios vs. Tools
No.
Requirement
S1
S2
S3
S4
S5
S6
S7
S8
Count
T1
multi-waveband data
+
+
+
+
+
+
+
+
8
T2
model/profile fitter/classificator
+
-
+
-
+
+
+
+
6
T3
on-the-fly SED builder
-
-
-
+
-
+
+
+
4
T4
cross-matcher, map comparison
-
+
+
+
-
+
+
+
6
T5
access to theoretical data (see also T2)
-
-
+
-
-
-
-
+
2
T6
robotic telescope interface
-
-
-
-
-
+
-
-
1
T7
generic source extractor
-
+
-
+
-
+
+
+
5
other Requirements
S1
S2
S3
S4
S5
S6
S7
S8
Count
-
data coverage: all-sky (vs. scattered
src.)
+
+
-
-
-
-
-
-
2
T1
image convolution
+
+
-
-
-
-
-
-
2
T2
line ID database
-
+
-
+
-
+
-
-
3
T1
PSF matching capability
-
-
-
-
-
-
+
+
2
T3
search by col./col or col/mag. index
-
-
-
-
+
+
+
+
4
?
time dependent analysis
-
-
+
-
-
+
-
-
2