S R Kulkarni References This is a tutorial Primary reference E Berger 2013 Annual Review GW perspective Kalsiwal amp Nissanke 2013 Properties Defined primary by duration Tlt2 ID: 626207
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Slide1
Short hard bursts
S. R. KulkarniSlide2
References
This is a tutorial
Primary reference: E. Berger (2013) Annual Review
GW perspective:
Kalsiwal
&
Nissanke
(2013) Slide3
Properties
Defined primary by duration (T<2
s
) and further refined by hardness ratio
In the BATSE sample the rate of short hard bursts (
SHBs
) is one quarter that of the total population (the remaining are Long Soft bursts).
Less
fluence
relative to long duration
GRBsSlide4Slide5Slide6Slide7
Host Galaxies
Found in all types of environments
Clusters of galaxies
Elliptical galaxies
Field star forming galaxies
Interesting Clue: Association with
ULRGs
GRB 100206A (dusty ULIRG,
z
=0.407)
GRB 120804A (dusty ULIRG,
z
=1.3)
But only 1% of mass is in
ULIRGsSlide8Slide9
Comparing to other samples
Long duration
GRBs
are primarily found in low mass star-forming galaxies
SHBs
appear to trace the field population of star forming galaxies
Just like SN of type
Ia
,
SHBs
arise infield galaxies of both old population and young star forming field galaxies
However the SN rate is higher in star-forming galaxiesSlide10Slide11Slide12Slide13Slide14Slide15Slide16Slide17