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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
170.2091 -61.8757 0.0281 37.1 -167.9 1.7268 6.9 TRIG_00341076
------------------------------------------
Foreground time interval of the image:
0.000 320.000 (delta_t = 320.000 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 320.000000
8 ms binning
From T100_start-3 s to T100_start+3 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 320.000000
2 ms binning
From T100_start-1 s to T100_start+1 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 320.000000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Flight mask-tagged light curves
Caution: Mask-weight map is always using the same on-axis map
Quad-rate summed light curves (from T0-300 to T0+1000)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.56709 ( -0.302874 0.341436 )
Norm@50keV : 2.86106E-04 ( -7.53193e-05 7.66029e-05 )
------------------------------------------------------------
# Chi-Squared = 63.29 using 59 PHA bins.
# Reduced chi-squared = 1.110 for 57 degrees of freedom
# Null hypothesis probability = 2.640857e-01
Photon flux (15-150 keV) in 320 sec: 5.85947E-02 ( -0.0093828 0.00938869 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.32739e-07 ( -1.81068e-07 1.90393e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.67897 ( -5.31456 1.92315 )
Epeak [keV] : 26.5426 ( -7.9746 4.92461 )
Norm@50keV : 0.229845 ( )
------------------------------------------------------------
# Chi-Squared = 53.25 using 59 PHA bins.
# Reduced chi-squared = 0.9509 for 56 degrees of freedom
# Null hypothesis probability = 5.795082e-01
Photon flux (15-150 keV) in 320 sec: 5.65230E-02 ( -0.0092452 0.0092179 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.78422e-07 ( -1.48675e-07 1.66813e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.37870 ( -3.65493 -2.82381 )
beta : -4.21791 ( 4.20982 1.20347 )
Epeak [keV] : 26.1129 ( -3.71765 3.44166 )
Norm@50keV : 4.24141 ( -3.08829 23.8394 )
------------------------------------------------------------
# Chi-Squared = 52.35 using 59 PHA bins.
# Reduced chi-squared = 0.9518 for 55 degrees of freedom
# Null hypothesis probability = 5.766048e-01
Photon flux (15-150 keV) in 320 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
R^2/D10^2 : ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
Norm : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : ( )
R1^2/D10^2 : ( )
kT2 [keV] : ( )
R2^2/D10^2 : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.56709 ( -0.302874 0.341436 )
Norm@50keV : 2.86106E-04 ( -7.53193e-05 7.66029e-05 )
------------------------------------------------------------
# Chi-Squared = 63.29 using 59 PHA bins.
# Reduced chi-squared = 1.110 for 57 degrees of freedom
# Null hypothesis probability = 2.640857e-01
Photon flux (15-150 keV) in 320 sec: 5.85947E-02 ( -0.0093828 0.00938869 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.32739e-07 ( -1.81068e-07 1.90393e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.67897 ( -5.31456 1.92315 )
Epeak [keV] : 26.5426 ( -7.9746 4.92461 )
Norm@50keV : 0.229845 ( )
------------------------------------------------------------
# Chi-Squared = 53.25 using 59 PHA bins.
# Reduced chi-squared = 0.9509 for 56 degrees of freedom
# Null hypothesis probability = 5.795082e-01
Photon flux (15-150 keV) in 320 sec: 5.65230E-02 ( -0.0092452 0.0092179 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.78422e-07 ( -1.48675e-07 1.66813e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.37870 ( -3.65493 -2.82381 )
beta : -4.21791 ( 4.20982 1.20347 )
Epeak [keV] : 26.1129 ( -3.71765 3.44166 )
Norm@50keV : 4.24141 ( -3.08829 23.5041 )
------------------------------------------------------------
# Chi-Squared = 52.35 using 59 PHA bins.
# Reduced chi-squared = 0.9518 for 55 degrees of freedom
# Null hypothesis probability = 5.766048e-01
Photon flux (15-150 keV) in 320 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
R^2/D10^2 : ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
Norm : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : ( )
R1^2/D10^2 : ( )
kT2 [keV] : ( )
R2^2/D10^2 : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)
Power-law model
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.56709 ( -0.302874 0.341436 )
Norm@50keV : 2.86106E-04 ( -7.53193e-05 7.66029e-05 )
------------------------------------------------------------
# Chi-Squared = 63.29 using 59 PHA bins.
# Reduced chi-squared = 1.110 for 57 degrees of freedom
# Null hypothesis probability = 2.640857e-01
Photon flux (15-150 keV) in 320 sec: 5.85947E-02 ( -0.0093828 0.00938869 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.32739e-07 ( -1.81068e-07 1.90393e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.67897 ( -5.31456 1.92315 )
Epeak [keV] : 26.5426 ( -7.9746 4.92461 )
Norm@50keV : 0.229845 ( )
------------------------------------------------------------
# Chi-Squared = 53.25 using 59 PHA bins.
# Reduced chi-squared = 0.9509 for 56 degrees of freedom
# Null hypothesis probability = 5.795082e-01
Photon flux (15-150 keV) in 320 sec: 5.65230E-02 ( -0.0092452 0.0092179 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.78422e-07 ( -1.48675e-07 1.66813e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.37870 ( -3.65493 -2.82381 )
beta : -4.21791 ( 4.20982 1.20347 )
Epeak [keV] : 26.1129 ( -3.71765 3.44166 )
Norm@50keV : 4.24141 ( -3.08829 24.4692 )
------------------------------------------------------------
# Chi-Squared = 52.35 using 59 PHA bins.
# Reduced chi-squared = 0.9518 for 55 degrees of freedom
# Null hypothesis probability = 5.766048e-01
Photon flux (15-150 keV) in 320 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 3.11272e-07
S(50-100 keV) = 2.09991e-07
T90 vs. Hardness ratio plot
T90 = 320 sec.
Hardness ratio (energy fluence ratio) = 0.674622
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.989797
Count Ratio (50-100 keV) / (15-25 keV) = 0.12939
Mask shadow pattern
IMX = -7.383386992182867E-01, IMY = 1.583895782330415E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 320.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 320.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 320.000000
Spacecraft aspect plot
Bright source in the pre-burst/pre-slew/post-slew images
Pre-burst image of 15-350 keV band
Time interval of the image:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 320.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5470 -40.4900 5.4 31.7 138.7 0.6806 2.1 4.0 Vela X-1
170.3581 -60.5663 7.9 37.8 -169.7 -0.3996 -1.5 3.6 Cen X-3
186.6770 -62.7807 0.8 43.0 -160.3 5.6136 14.9 0.8 GX 301-2
116.5853 -34.9033 2.1 27.2 107.1 1.7005 5.4 ------ UNKNOWN
170.2091 -61.8758 1.7 37.1 -167.9 1.7260 6.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
393.500600 963.060000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.3496 -40.5444 7.7 29.9 69.0 -0.8072 -1.5 8.2 Vela X-1
170.5569 -60.5363 6.0 1.4 136.5 0.6509 1.9 8.8 Cen X-3
186.6461 -62.7726 0.2 7.7 -126.4 15.8753 49.5 0.3 GX 301-2
133.2831 -59.9714 2.7 17.8 29.3 1.3399 4.2 ------ UNKNOWN
170.2843 -61.9021 1.5 0.0 -117.0 2.6206 7.9 ------ UNKNOWN
84.6440 -65.7170 2.6 35.0 -4.7 1.8493 4.4 ------ UNKNOWN
343.5180 -70.9664 3.3 47.1 -53.3 6.5996 3.5 ------ UNKNOWN
Plot creation:
Fri Jun 3 13:29:39 EDT 2011