1. Prompt searches for optical signal from gravitational wave transients with Pi of the Sky Adam Zadrożny Pi of the Sky session at XXXII-th IEEE-SPIE Joint Symposium Wilga 2013

2. GRAVITATIONAL WAVES

3. Gravitational Waves

4. Binary Coalescence and Supernova Explosions Neutron star / Blackhole binaries Supernova

5. Detection of gravitational waves

6. Range of LIGO and Advanced LIGO interferometer

7. LOOC-UP PROJECT

8. Locating and Observing Optical Counterparts to Unmodeled Pulses Search for an optical counterpart to a gravitational waves event – to confirm an event – to gather more information Two past science runs in 2009-2010

9. Telescopes Involved in Looc-Up Project

10. A Simplified Flowachart of the Online Analysis [1.]

11. Sky localization

12. PI OF THE SKY

13. Pi of the Sky - Scopes 4 cameras that might work in coincidence or not Each camera – FOV: 20 [deg] x 20 [deg] – Limiting brightness: 12 mag – Exposition time: 10 s 2 cameras working in coincidence Each camera – FOV: 20 [deg] x 20 [deg] – Limiting brightness: 12 mag – Exposition time: 10 s INTA (Spain)San Pedro de Atacama (Chile)

14. Overview of Pi of the Sky system used for Looc-Up Camera: – FOV: 20 deg x 20 deg – Exposure time: 10 s – Limiting magnitude : 12 mag – CCD: 2 K x 2 K Observation site: – Koczargi Stare near Warsaw, Poland

15. Pipeline For analysis we used catalog based pipeline As a seed for star catalog we used Guide Star Catalog with stars up to 11 mag For each exposition we add all recognized stars to the databases with their brightness measurements – Normalization of brightness to V magnitudes from the TYCHO catalog

16. Transient Search for Looc-Up Transient search using PotS nova algorithm: – Looking for new objects that fulfill quality constrains – Looking for objects that suddenly increase their brightness more than 2 mag – All transients are undergoing human inspection Objects that are suspected to be transients were cross-correlated with INTA images taken year after the science run

17. Transient Recognition Efficiency

18. Lesson Learned With Pi of the Sky system it is possible to image huge part (1200 deg^2) of the sky within less than an 15 minutes taking multiple images of each field On-line transient recognition might be helpful in next run for effective transients observation and recognition

19. UPGRADES AND FUTURE SEARCHES

20. Future system FOV : 1200 deg^2 Parallax : 240 km Limiting magnitude: 12 mag Site: Spain Operational time: end of 2013

21. Improving efficiency for possible events Lowering constrains for events that are in most probable regions of a sky maps of gravitational event candidate Inspecting all objects that are near to galaxies that might be a source of gravitational waves (closer than 100 MPc)

22. Let’s start paying a close look for next 2 years to objects from GWGC. This might help to detect any change during future Looc-Up science runs

23. Summary Observing an optical counter part might be a great help for confirming a gravitational waves event Pi of the Sky because of a very wide field of view might be helpful for Looc-Up project Using GWGC might be helpful for fast recognition of a possible transient connected to gravitational wave event candidate

24. Questions?

25. Bibliography 1.J. Kanner et al., Implementation and testing of the first prompt search for gravitational wave transients with electromagnetic counterparts, arXiv:1109.3498v2 [astro-ph.IM] 2.Patrick J Sutton et al 2010 New J. Phys. 12 053034 3.Malek, K., Batsch, T., Cwiok, M., et al. 2009, Proceedings of SPIE, 7502, 75020D 4.Brian D Metzger, Edo Berger, arXiv:1108.6056v1