Optical Follow-up for IceCube Marek Kowalski Humboldt University Berlin

IceCube Fact Sheet AMANDA Construction: IceCube Construction: IceTop Instrumented Volumen – 1 km 3 Angular resolution < 1.0° Energy threshold – 100 GeV Completion – % completion – 2008 The IceCube Neutrino Telescope

IceCube Network of optical telescopes day 1-10 optical SN/GRB detection Optical follow-up IceCube Neutrino-Trigger day 0

Science Motivation Search for transient sources: Supernova (id: rising lightcurve) Gamma-Ray Burst (id: afterglow) Gamma-Dark Bursts (id: orphan afterglows) MK, A. Mohr, Astropart (2007)

Example: Supernovae with mildly relativistic jets Simulation: MacFadyen (2000) Gravitational Collapse of a massive, rotating star (>25 M  ): Motivation: Gamma-Ray Bursts, polarisation measurments Hard to prove, since jets are absorbed. Neutrino-prediction: 30 Neutrino-Events in 10 s in IceCube for a 10 Mpc distant Supernova. Ando & Beacom, PRL (2005); Razzaque, Meszaros & Waxman, PRL (2005).

Detecting Supernovae

MK, A. Mohr, Astropart. Phys (2007) Supernova sensitivity Ando & Beacom PRL2005 Sensitivity can be doubled by follow-up!

ROTSE III 4 Telescope (USA, Turkey, Australia, Nambia) Diameter 0.45 m Median response time: 7 s FoV: 1.85  x 1.85  Up to 50 IceCube ToO-Trigger/Year Optical follow-up with ROTSE planed for April/Mai 2008 (=50% IceCube)

ROTSE III 4 Telescope (USA, Turkey, Australia, Nambia) Diameter 0.45 m Median response time: 7 s FoV: 1.85  x 1.85  Up to 50 IceCube ToO-Trigger/Year Optical follow-up with ROTSE planed for April/Mai 2008 (=50% IceCube) IceCube 80% Error Circle M o

A network of robotic telescopes ROTSE III 4 x 0.45 m FoV: 2  x 2  RoboNet Stella Monet PTF

Conclusion There is an opportunity for robotic telescopes such as STELLA to work with IceCube and other neutrino telescopes (ANTARES, KM3NET). For each telescope, only a small amount of time needed.

1.85 o Error circle: ~60% of IC40 ~80% of IC80

Analysing a ROTSE image Of the 83 objects none shows variations larger than 1 mag GRB/SN would be identified as variable object on time-scales of minutes to days 5052 objects identified Compare to USNO2.0 reference star catalog (match to within pixel) 83 objects not in the catalog GRB afterglow, 500 s late

Summary Monitoring module for short time scale to complement the run wise monitoring. Doublet trigger schema exists but not yet optimized. ROTSE is ready to receive IC triggers (<50/yr); the goal is to have the online software ready for IC40.