VOEvent & Solar Physics:VOEvent & Solar Physics:Solar transient eventsSolar transient events

Dec. 5, 2005Dec. 5, 2005

Many events happen on the sunMany events happen on the sun

FlaresFlaresCoronal Mass Ejections (CMEs)Coronal Mass Ejections (CMEs)Filament eruptionsFilament eruptionsActive region emergence on earthward Active region emergence on earthward

side of sunside of sunActive region emergence on spaceward Active region emergence on spaceward

side of sunside of sun

FlaresFlares

CMEs CMEs (and comets)(and comets)

Filament eruptionsFilament eruptions

Active region emergence on Active region emergence on earthward sideearthward side

Active Region emergence Active Region emergence on spaceward sideon spaceward side

8/29/05

8/30/05

8/31/05

9/01/05

9/02/05

9/03/05

AR10808

Holography of the farsideHolography of the farside

Evolution of AR 9393 from March 15 2001 Evolution of AR 9393 from March 15 2001 to April 23 2001. (MDI)to April 23 2001. (MDI)

Courtesy of P. Scherrer and K. Oslund

Most important solar eventsMost important solar events Flares and CMEs affect technologyFlares and CMEs affect technology

TelecommunicationsTelecommunications Manned & unmanned space flightManned & unmanned space flight Military operationsMilitary operations Commercial airlinesCommercial airlines Power gridsPower grids PipelinesPipelines

The Solar Event Center (SEC) in Boulder The Solar Event Center (SEC) in Boulder monitors space weather and issues warningsmonitors space weather and issues warnings

USAF has space weather center in ColoradoUSAF has space weather center in Colorado NASA assets provide warningsNASA assets provide warnings

How could VOEvent be used?How could VOEvent be used? Notification to SEC, USAF, NASA, NSO, etc.Notification to SEC, USAF, NASA, NSO, etc.

But would have to prove better than current systemsBut would have to prove better than current systems Repointing of space assetsRepointing of space assets

SOHOSOHO TRACETRACE RHESSIRHESSI STEREOSTEREO SOLAR-BSOLAR-B SDOSDO

Pre-emption of ground based programsPre-emption of ground based programs Terrestrial magnetosphere community may be interestedTerrestrial magnetosphere community may be interested

Auroral activityAuroral activity

Future usesFuture uses

ATSTATSTFirst major use of queue observing in solarFirst major use of queue observing in solarHighly dependent on site conditionsHighly dependent on site conditionsVOEvent to select observational program?VOEvent to select observational program?

HelioseismologyHelioseismologyStarting to provide space weather predictorsStarting to provide space weather predictorsVOEvent might be useful for events linked to VOEvent might be useful for events linked to

the solar interiorthe solar interior

Solar specific requirementsSolar specific requirements Location of observatoryLocation of observatory

Mainly for space observationsMainly for space observations Ulysses out of the eclipticUlysses out of the ecliptic SOHO at L1SOHO at L1 STEREO at two locations along earth’s orbitSTEREO at two locations along earth’s orbit

Coordinate systemCoordinate system Heliographic latitude, longitudeHeliographic latitude, longitude Carrington coordinatesCarrington coordinates Sun rotates differentiallySun rotates differentially NOAA Active Region numbers (e.g. AR10808)NOAA Active Region numbers (e.g. AR10808) Might eventually need solar depthMight eventually need solar depth

For space weather predictors, might want probability of For space weather predictors, might want probability of occurrence estimateoccurrence estimate

Obstacles to solar adoption of Obstacles to solar adoption of VOEventVOEvent

Existing systemsExisting systemsNOAA, NASA, USAF all have long-standing NOAA, NASA, USAF all have long-standing

systemssystems IAU telegrams unknownIAU telegrams unknownMany full-disk instrumentsMany full-disk instruments

Most events are routinely capturedMost events are routinely captured

Alternative usesAlternative uses

Observing planning for pointed Observing planning for pointed instruments, JOPs (Joint Observing instruments, JOPs (Joint Observing Programs)Programs)

Incorporation of events into Virtual Solar Incorporation of events into Virtual Solar Observatory (VSO)Observatory (VSO)

Notification of newly available data, Notification of newly available data, processing status, or resultsprocessing status, or results

Why not RSS?Why not RSS?

RSS feeds in solarRSS feeds in solar

May be added to VSOMay be added to VSONew data notification for NSO/SOLIS, New data notification for NSO/SOLIS,

SOHO/EIT, TRACESOHO/EIT, TRACETRACE also using Podcasts for data TRACE also using Podcasts for data

transfer, with Itunes interface – science transfer, with Itunes interface – science with your Ipod!with your Ipod!

SummarySummary

VOEvent could be useful for solarVOEvent could be useful for solarWould need some solar-specific Would need some solar-specific

adaptationsadaptationsBut cultural obstacles may prevent But cultural obstacles may prevent

adoptionadoptionNeed to talk to SEC, NASA, USAFNeed to talk to SEC, NASA, USAF