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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
354.7082 66.2577 0.0123 42.4919 174.4289 2.2258866 15.599 TRIG_00283791
Foreground time interval of the image:
-2.499 72.101 (delta_t = 74.600 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) The mask-weighted light curves are using the flight position.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 64.000000
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 64.000000
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 64.000000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Quad-rate summed light curves (from T0-300s to T0+1000s)
Spectral Evolution
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.
Time averaged spectrum fit using the average DRM
Power-law model
Time interval is from -57.324 sec. to 400.776 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64619 ( -0.0760207 0.0764155 )
Norm@50keV : 1.38642E-03 ( -5.70808e-05 5.68578e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.85 using 59 PHA bins.
# Reduced chi-squared = 1.243 for 57 degrees of freedom
# Null hypothesis probability = 1.026738e-01
Photon flux (15-150 keV) in 458.1 sec: 0.180805 ( -0.00769859 0.00772753 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.90912e-06 ( -2.57024e-07 2.58374e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -57.324 sec. to 400.776 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60907 ( -0.284805 0.107711 )
Epeak [keV] : 534.998 ( -534.998 -534.998 )
Norm@50keV : 1.44634E-03 ( -0.000112875 0.000535796 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.80 using 59 PHA bins.
# Reduced chi-squared = 1.264 for 56 degrees of freedom
# Null hypothesis probability = 8.801232e-02
Photon flux (15-150 keV) in 458.1 sec: 0.180238 ( -0.008231 0.008129 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.88622e-06 ( -2.81961e-07 2.79762e-07 ) ergs/cm2
Band function
Time interval is from -57.324 sec. to 400.776 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.89654 ( -4.89654 -4.89654 )
beta : -1.66995 ( -0.0811462 0.0797348 )
Epeak [keV] : 21.1547 ( -21.1547 3.34269 )
Norm@50keV : 387.429 ( -15.4345 699737 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.30 using 59 PHA bins.
# Reduced chi-squared = 1.260 for 55 degrees of freedom
# Null hypothesis probability = 9.288086e-02
Photon flux (15-150 keV) in 458.1 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] : 14.3908 ( )
R^2/D10^2 : 2.19209E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 239.15 using 59 PHA bins.
# Reduced chi-squared = 4.1955 for 57 degrees of freedom
# Null hypothesis probability = 3.619692e-24
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.380e-07 3.598e-08
25- 50 1.674e-06 8.910e-08
50-150 2.314e-06 1.871e-07
15-150 4.425e-06 2.100e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 167.268 (-32.2116 -166.88)
Norm : 0.729419 (-0.034358 0.0379135)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.53 using 59 PHA bins.
# Reduced chi-squared = 1.308 for 57 degrees of freedom
# Null hypothesis probability = 5.940429e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.495e-07 5.451e-08
25- 50 1.599e-06 1.374e-07
50-150 3.295e-06 9.877e-07
15-150 5.743e-06 1.147e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.66505 (-0.797603 0.883539)
R1^2/D10^2 : 0.248151 (-0.0883765 0.150965)
kT2 [keV] : 26.6424 (-3.37 4.7649)
R2^2/D10^2 : 1.96572E-03 (-0.000854436 0.0012449)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.60 using 59 PHA bins.
# Reduced chi-squared = 1.302 for 55 degrees of freedom
# Null hypothesis probability = 6.563668e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.760e-07 1.074e-07
25- 50 1.583e-06 1.530e-07
50-150 3.398e-06 4.675e-07
15-150 5.857e-06 6.482e-07
Peak spectrum fit
Power-law model
Time interval is from -53.100 sec. to -52.100 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.868598 ( -0.118438 0.115733 )
Norm@50keV : 1.74229E-02 ( -0.00120151 0.00119565 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.10 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 57 degrees of freedom
# Null hypothesis probability = 1.692336e-01
Photon flux (15-150 keV) in 1 sec: 1.99965 ( -0.137094 0.137285 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97965e-07 ( -1.42217e-08 1.42577e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -53.100 sec. to -52.100 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.474702 ( -0.53961 0.435393 )
Epeak [keV] : 229.459 ( )
Norm@50keV : 2.58034E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.17 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 56 degrees of freedom
# Null hypothesis probability = 1.880417e-01
Photon flux (15-150 keV) in 1 sec: 1.97295 ( -0.14106 0.14104 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95117e-07 ( -1.5044e-08 1.4885e-08 ) ergs/cm2
Band function
Time interval is from -53.100 sec. to -52.100 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.910696 ( 0.910696 0.910696 )
beta : -0.868582 ( -0.115627 0.118392 )
Epeak [keV] : 12.7786 ( -12.7786 -12.7786 )
Norm@50keV : 2.64831E-02 ( -0.00977573 426358 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.10 using 59 PHA bins.
# Reduced chi-squared = 1.220 for 55 degrees of freedom
# Null hypothesis probability = 1.268520e-01
Photon flux (15-150 keV) in 1 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] : 23.6580 (-2.09548 2.42792)
R^2/D10^2 : 5.95878E-02 (-0.0154075 0.0198317)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 88.75 using 59 PHA bins.
# Reduced chi-squared = 1.557 for 57 degrees of freedom
# Null hypothesis probability = 4.500946e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.961e-09 8.355e-10
25- 50 3.285e-08 3.490e-09
50-150 1.371e-07 1.495e-08
15-150 1.759e-07 1.445e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.359 ( )
Norm : 7.90975 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 157.04 using 59 PHA bins.
# Reduced chi-squared = 2.7551 for 57 degrees of freedom
# Null hypothesis probability = 2.722671e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.970e-08 1.735e-09
25- 50 3.789e-08 4.675e-09
50-150 8.310e-08 2.880e-08
15-150 1.407e-07 2.697e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 13.9720 (-3.86995 3.53153)
R1^2/D10^2 : 0.196365 (-0.087399 0.221321)
kT2 [keV] : 67.3971 (-28.2776 -63.3411)
R2^2/D10^2 : 2.32940E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.36 using 59 PHA bins.
#Fit statistic : Chi-Squared = 64.33 using 59 PHA bins.
# Reduced chi-squared = 1.170 for 55 degrees of freedom
# Reduced chi-squared = 1.170 for 55 degrees of freedom
# Null hypothesis probability = 1.815914e-01
# Null hypothesis probability = 1.822663e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.094e-09 2.835e-09
25- 50 3.696e-08 1.393e-08
50-150 1.482e-07 7.213e-08
15-150 1.942e-07 8.632e-08
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: 2.19692 ( -0.183223 0.194321 )
Norm@50keV : 1.72649E-03 ( -0.000221757 0.000216422 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.87 using 59 PHA bins.
# Reduced chi-squared = 1.156 for 57 degrees of freedom
# Null hypothesis probability = 1.968964e-01
Photon flux (15-150 keV) in 74.6 sec: 0.285365 ( -0.0269274 0.0269433 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21044e-06 ( -1.32958e-07 1.35193e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96879 ( -0.732879 0.0316927 )
Epeak [keV] : 5.67635 ( )
Norm@50keV : 2.34223E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.72 using 59 PHA bins.
# Reduced chi-squared = 1.174 for 56 degrees of freedom
# Null hypothesis probability = 1.754798e-01
Photon flux (15-150 keV) in 74.6 sec: 0.283519 ( -0.027987 0.02787 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19062e-06 ( -1.57473e-07 1.50714e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.86705 ( -4.86705 -4.86705 )
beta : -2.26628 ( -0.23057 0.204572 )
Epeak [keV] : 19.6654 ( -19.6654 3.81208 )
Norm@50keV : 1276.84 ( -119.193 3.32643e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.91 using 59 PHA bins.
# Reduced chi-squared = 1.180 for 55 degrees of freedom
# Null hypothesis probability = 1.695058e-01
Photon flux (15-150 keV) in 74.6 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) = 1.56e-06
S(50-100 keV) = 2.00e-06
T90 vs. Hardness ratio plot
T90 = 384.936000019312 sec.
Hardness ratio (energy fluence ratio) = 1.28205
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.26334
Count Ratio (50-100 keV) / (15-25 keV) = 0.891577
Mask shadow pattern
IMX = -9.117435255017003E-01, IMY = -8.893280574872918E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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:
-2.499390 72.100600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6302 21.9941 1.0 41.1 -68.0 3.0929 11.0 1.2 Crab
354.7083 66.2578 0.7 42.5 174.4 2.2269 15.6 ------ UNKNOWN
310.9041 83.3140 2.2 57.4 -169.1 1.9739 5.1 ------ UNKNOWN
114.5699 76.9668 2.4 55.2 -145.7 2.2600 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
139.100600 963.063000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
308.1223 40.9837 2.1 36.0 95.2 5.2415 5.5 1.9 Cyg X-3
326.0539 38.4124 4.1 32.3 71.0 2.3676 2.8 7.8 Cyg X-2
354.6999 66.2193 2.2 0.0 84.3 2.0403 5.2 ------ UNKNOWN
206.5843 53.0761 3.0 58.3 -175.7 10.5488 3.9 ------ UNKNOWN
96.1936 82.5660 3.3 26.2 -137.1 1.4276 3.5 ------ UNKNOWN
192.8901 53.9797 2.7 59.0 -166.1 11.6144 4.2 ------ UNKNOWN
Plot creation:
Sun May 31 09:49:05 EDT 2015