1. VOEvent & Solar Physics: Solar transient events Dec. 5, 2005

2. Many events happen on the sun Flares Flares Coronal Mass Ejections (CMEs) Coronal Mass Ejections (CMEs) Filament eruptions Filament eruptions Active region emergence on earthward side of sun Active region emergence on earthward side of sun Active region emergence on spaceward side of sun Active region emergence on spaceward side of sun

3. Flares

4. CMEs (and comets)

5. Filament eruptions

6. Active region emergence on earthward side

7. Active Region emergence on spaceward side 8/29/05 8/30/05 8/31/05 9/01/05 9/02/05 9/03/05 AR10808

8. Holography of the farside Evolution of AR 9393 from March 15 2001 to April 23 2001. (MDI) Evolution of AR 9393 from March 15 2001 to April 23 2001. (MDI) Courtesy of P. Scherrer and K. Oslund

9. Most important solar events Flares and CMEs affect technology Flares and CMEs affect technology Telecommunications Telecommunications Manned & unmanned space flight Manned & unmanned space flight Military operations Military operations Commercial airlines Commercial airlines Power grids Power grids Pipelines Pipelines The Solar Event Center (SEC) in Boulder monitors space weather and issues warnings The Solar Event Center (SEC) in Boulder monitors space weather and issues warnings USAF has space weather center in Colorado USAF has space weather center in Colorado NASA assets provide warnings NASA assets provide warnings

10. 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 systems But would have to prove better than current systems Repointing of space assets Repointing of space assets SOHO SOHO TRACE TRACE RHESSI RHESSI STEREO STEREO SOLAR-B SOLAR-B SDO SDO Pre-emption of ground based programs Pre-emption of ground based programs Terrestrial magnetosphere community may be interested Terrestrial magnetosphere community may be interested Auroral activity Auroral activity

11. Future uses ATST ATST First major use of queue observing in solar First major use of queue observing in solar Highly dependent on site conditions Highly dependent on site conditions VOEvent to select observational program? VOEvent to select observational program? Helioseismology Helioseismology Starting to provide space weather predictors Starting to provide space weather predictors VOEvent might be useful for events linked to the solar interior VOEvent might be useful for events linked to the solar interior

12. Solar specific requirements Location of observatory Location of observatory Mainly for space observations Mainly for space observations Ulysses out of the ecliptic Ulysses out of the ecliptic SOHO at L1 SOHO at L1 STEREO at two locations along earths orbit STEREO at two locations along earths orbit Coordinate system Coordinate system Heliographic latitude, longitude Heliographic latitude, longitude Carrington coordinates Carrington coordinates Sun rotates differentially Sun rotates differentially NOAA Active Region numbers (e.g. AR10808) NOAA Active Region numbers (e.g. AR10808) Might eventually need solar depth Might eventually need solar depth For space weather predictors, might want probability of occurrence estimate For space weather predictors, might want probability of occurrence estimate

13. Obstacles to solar adoption of VOEvent Existing systems Existing systems NOAA, NASA, USAF all have long-standing systems NOAA, NASA, USAF all have long-standing systems IAU telegrams unknown IAU telegrams unknown Many full-disk instruments Many full-disk instruments Most events are routinely captured Most events are routinely captured

14. Alternative uses Observing planning for pointed instruments, JOPs (Joint Observing Programs) Observing planning for pointed instruments, JOPs (Joint Observing Programs) Incorporation of events into Virtual Solar Observatory (VSO) Incorporation of events into Virtual Solar Observatory (VSO) Notification of newly available data, processing status, or results Notification of newly available data, processing status, or results Why not RSS? Why not RSS?

15. RSS feeds in solar May be added to VSO May be added to VSO New data notification for NSO/SOLIS, SOHO/EIT, TRACE New data notification for NSO/SOLIS, SOHO/EIT, TRACE TRACE also using Podcasts for data transfer, with Itunes interface – science with your Ipod! TRACE also using Podcasts for data transfer, with Itunes interface – science with your Ipod!

16. Summary VOEvent could be useful for solar VOEvent could be useful for solar Would need some solar-specific adaptations Would need some solar-specific adaptations But cultural obstacles may prevent adoption But cultural obstacles may prevent adoption Need to talk to SEC, NASA, USAF Need to talk to SEC, NASA, USAF