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The Robotic KAIT and its SN/GRB Program

The Robotic KAIT and its SN/GRB Program. Weidong Li Alex Filippenko. University of California, Berkeley. KAIT. 30 inch (0.76 m) mirror.

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The Robotic KAIT and its SN/GRB Program

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  1. The Robotic KAIT and its SN/GRB Program Weidong Li Alex Filippenko University of California, Berkeley

  2. KAIT 30 inch (0.76 m) mirror Funded by NSF, the Sylvia & Jim Katzman Foundation, AutoScope Corp., Sun Microsystems, Hewlett-Packard Co., the University of California (Berkeley and Santa Cruz), and NASA. Lick Observatory, Mt. Hamilton, near San Jose, CA

  3. KAIT Hardware Telescope Secondary Cameras Weatherstation Step motors Guider Apogee filterwheel • 30 inch R-C telescope, f/8.2 • Laser optical encoders • Compact and light-weight • Precise secondary maneuver • 20 slot filter wheel • Apogee AP7 camera, 6.7’ • FOV, 0.8”/pix • Off-axis guiding • Automatic weatherstation

  4. LOSS in Numbers 1. No. of galaxies monitored: 2001-2003 After Jun 2004 14,000  7,500 (06/2004) No. of images per night 700-1300 img/night No. of obs 3. Interval distribution Obs interval (days)

  5. Who found the most nearby SNe? LOSS427 SNe (1998 - 2004) Zwicky 236 SNe (1940 - 1980) Mueller 110 SNe (1950 - 2000)

  6. LOSS SN followup 10-20% of time Photometry calibration KAIT 2-3 nights per month Calibration photometry Lick 40-in 2 nights per month spectroscopy Lick 3-m Occasional spectroscopy Keck I/II

  7. Distribution of SN followup Some Good Great Total SN Ia57 2088 165 SN II32 1629 77 SN Ibc2 312 17 Total: 259 (As of May, 2005)

  8. KAIT GRB Program - Li et al. 2003 • Program to respond to GRB alerts promptly • Interrupt KAIT and take a pre-arranged • sequence of images • Reaching 19th mag within 60s of alerts • Unfiltered obs V, I, unfiltered • limitation: small field of view 6.7’ x 6.7’

  9. GRB 021211 • Obs started at t=105s • 18 data points in 10 min • One of the 2 GRBs with • reverse shock emission • detected (Li, Filippenko, Chornock, & Jha 2003)

  10. GRB 020813 Trig date Resp. time(s) 2262 02/08/13 143 02/08/13 63 2493 02/12/11 108 2493 02/12/11 35 2493 02/12/11 23 2493 02/12/11 45

  11. GRB 040924 t = 30s t = 25 min x GRB 040924 15” off field !

  12. Swift Lick Weather Lick Observatory May 19, 2005 Swift bursts: GRB 050412 (GCN 3256): t = 66s GRB 050416 (GCN 3270): t = 40s

  13. Summary KAIT is a powerful SN search/followup engine capable of catching GRB OA early

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