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Hsiao-Wen Chen (MIT) Josh Bloom (Harvard-Smithsonian) Jason X. Prochaska (Lick Observatory)

Hsiao-Wen Chen (MIT) Josh Bloom (Harvard-Smithsonian) Jason X. Prochaska (Lick Observatory). 236 GRBs over 7 years. The Swift Gamma-ray Burst Mission Burst Alert Telescope (BAT) : 4 arcmin error radius X-ray Telescope (XRT): 5 arcsec accuracy UV/Optical Telescope (UVOT):

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Hsiao-Wen Chen (MIT) Josh Bloom (Harvard-Smithsonian) Jason X. Prochaska (Lick Observatory)

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  1. Hsiao-Wen Chen (MIT) Josh Bloom (Harvard-Smithsonian) Jason X. Prochaska (Lick Observatory)

  2. 236 GRBs over 7 years

  3. The Swift Gamma-ray Burst Mission • Burst Alert Telescope (BAT) : • 4 arcmin error radius • X-ray Telescope (XRT): • 5 arcsec accuracy • UV/Optical Telescope (UVOT): • < 2 arcsec

  4. ~ 150 instantly-localized GRBs per year

  5. Barth et al. (2003) Rapid spectroscopic follow-up with R > 6000

  6. LBQS0058+0155 zDLA=0.613 • GRAASP Science: • Probe the reionization epoch: • 5% of Swift GRBs expected at z > 6

  7. LBQS0058+0155 zDLA=0.613 • GRAASP Science: • Probe the reionization epoch: • 5% of Swift GRBs expected at z > 6 • Unmask damped Lya absorbing • galaxies

  8. GRAASP Science: • Probe the reionization epoch: • 5% of Swift GRBs expected at z > 6 • Unmask damped Lya absorbing • galaxies • Study the chemical abundances • of the ISM of the GRB hosts

  9. GRAASP telescope/funding resources so far : • UC/Keck TOO time: 16 hours per semester • TOO at Lick Observatory • TOO on Gemini N/S: 20 hours per semester • PAIRITEL: dedicated 1.3-m IR imaging telescope on Mt. Hopkins • Swift cycle 1 guest investigator program: $35 k

  10. GRAASP Alert System: http://www.graasp.org/

  11. Broader interests/participation in the Magellan community? • Rapid, efficient, organized follow-up program of all Swift GRBs. • Multiple connections to community interests (e.g. supernovae, IGM, etc.)---potential key-project material to foster inter-institution collaboration. • Public data archive to provide instant access of the program data to all Magellan members

  12. Issues: • Conflict of interests among individuals and time share between different partners? • Insurance of the vitality and productiveness of the project. • Features of GRAASP: • Automated alerts • Existing funding to build data archive • Data reduction pipeline for fast and uniform data processing.

  13. Summary: • Rapid spectroscopic follow-up of Swift GRBs on • Magellan; unique data for non-GRB sciences • GRAASP alert script already running on • all Magellan observers computers • Maximal science return, minimal hurdle • for Magellan observers • Logistical issues: observation setup, time share, etc.

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