GRB Optical

1
GRB Optical Followup with KAIT
Weidong Li
with
Alex Filippenko Ryan Chornock Saurabh Jha Ryan
Foley Josh Bloom Nat Butler Daniel Perley
2
KAIT

• 30-inch fully robotic
• Automatic scheduler
• Automatic weathercheck
• Automatic image processing

• Lick Obs. SN Search
• (LOSS) z

592 SNe (past 9 years)
Located at Lick Obs. Mt. Hamilton (4200)
3
KAIT GRB Program
- Li et al 2003a

• A good combination of size and speed
• Promptly respond to GRB alerts
• Interrupt KAIT
• Take a pre-arranged sequence of images
• Use V, I, Clear filters
• Real-time image processing, afterglow ID

4
Real-time afterglow ID
(after 20060210)
GRB 060210
DSS II red
KAIT
5
Info
Limiting mag
Minor planets?
Photometry ZP (USNO B1)
New objects
6
KAIT GRB obs during Swift
GRB GCN t(resp)
non-det det
050412 3256 66s 17.5 050416
3270 40s 16.5 050607
3533 49s 18.4 050727
3689 113s 18.2 050813 3794
39s 18.6 050908 3945
20.1 (t1.0 h) 050915
3985 290s 18.2 051109 4240
18.8 (t1.2-1.8 h)
051111A 4254 44s
13.4 060110
4499 78s 17.9
060206 4690
18.0 (t3.9 h) 060210
4725 63s 18.1 060428
5027 192s 19.6
060805 5400 119s 17.7 060906
5532 106s 18.9
060923 5584 18s 16.9 061126
unpub. 76s 16.0
7
GRB 021211

• HETE II burst
• Duration 2.5s
• Z1.006

SN 2002he
t105s
t171s
t259s
t9600s
Li et al. 2003b
8
Reverse shock
Forward shock
9
GRB 051111A

• Swift burst with duration of 30s
• Z 1.55

Butler et al. 2006
10
(No Transcript)
11
GRB 060210

• Swift burst with a duration of 255s
• Z 3.91

Li et al. 2007 in prep
I
R
12
BAT
XRT
KAITSLOTIS
13
Lessons learned from KAIT

• Densely sampled light curves good!

• Early color information good!

• Prompt phase observation good!

• Be friend with nature