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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
188.5387 6.9667 0.0078 43.7027 36.7805 9.4345585 24.708 TRIG_00639275
Foreground time interval of the image:
-38.984 38.600 (delta_t = 77.584 [sec])
Background time interval of the image:
-239.336 -38.984 (delta_t = 200.352 [sec])
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 12.160000
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 12.160000
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 12.160000
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 -38.984 sec. to 38.600 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28205 ( -0.092149 0.0913393 )
Norm@50keV : 8.20483E-03 ( -0.000418841 0.000417965 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.32 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 57 degrees of freedom
# Null hypothesis probability = 4.264261e-01
Photon flux (15-150 keV) in 77.58 sec: 0.975697 ( -0.0542504 0.0545432 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.31808e-06 ( -3.32859e-07 3.33482e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -38.984 sec. to 38.600 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20911 ( -0.364743 0.099553 )
Epeak [keV] : 588.105 ( -996.195 -996.195 )
Norm@50keV : 8.83148E-03 ( -0.000708066 0.00361354 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.36 using 59 PHA bins.
# Reduced chi-squared = 1.042 for 56 degrees of freedom
# Null hypothesis probability = 3.887577e-01
Photon flux (15-150 keV) in 77.58 sec: 0.968785 ( -0.051552 0.062595 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.30596e-06 ( -3.40398e-07 3.34517e-07 ) ergs/cm2
Band function
Time interval is from -38.984 sec. to 38.600 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.02020 ( 9.0202 9.0202 )
beta : -1.28205 ( -0.0913381 0.0921493 )
Epeak [keV] : 81.9473 ( -81.9473 -81.9473 )
Norm@50keV : 1.11515 ( -0.0569266 0.0568073 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.32 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 55 degrees of freedom
# Null hypothesis probability = 3.541573e-01
Photon flux (15-150 keV) in 77.58 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] : 20.1800 ( )
R^2/D10^2 : 4.18556E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 146.17 using 59 PHA bins.
# Reduced chi-squared = 2.5643 for 57 degrees of freedom
# Null hypothesis probability = 9.042348e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.540e-07 2.742e-08
25- 50 1.273e-06 9.697e-08
50-150 3.847e-06 3.006e-07
15-150 5.374e-06 3.286e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 4.16114 (-0.213018 0.212929)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.39 using 59 PHA bins.
# Reduced chi-squared = 1.568 for 57 degrees of freedom
# Null hypothesis probability = 3.950329e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.037e-07 4.659e-08
25- 50 1.546e-06 9.038e-08
50-150 3.391e-06 1.978e-07
15-150 5.741e-06 3.472e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.71292 (-1.44925 1.6944)
R1^2/D10^2 : 0.636175 (-0.2998 0.681637)
kT2 [keV] : 32.2912 (-4.85926 8.13242)
R2^2/D10^2 : 7.51044E-03 (-0.00385387 0.00560375)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.67 using 59 PHA bins.
# Reduced chi-squared = 1.103 for 55 degrees of freedom
# Null hypothesis probability = 2.789045e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.067e-07 1.488e-07
25- 50 1.423e-06 2.242e-07
50-150 4.306e-06 7.075e-07
15-150 6.335e-06 9.841e-07
Peak spectrum fit
Power-law model
Time interval is from 17.388 sec. to 18.388 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39009 ( -0.275052 0.27504 )
Norm@50keV : 2.46418E-02 ( -0.00400574 0.00399476 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.59 using 59 PHA bins.
# Reduced chi-squared = 1.309 for 57 degrees of freedom
# Null hypothesis probability = 5.890228e-02
Photon flux (15-150 keV) in 1 sec: 2.99423 ( -0.504629 0.506315 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.38592e-07 ( -4.17373e-08 4.20059e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 17.388 sec. to 18.388 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13370 ( -1.29189 1.55709 )
Epeak [keV] : 180.838 ( -180.838 -180.838 )
Norm@50keV : 3.27994E-02 ( -0.0119099 0.0988502 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.43 using 59 PHA bins.
# Reduced chi-squared = 1.329 for 56 degrees of freedom
# Null hypothesis probability = 5.031863e-02
Photon flux (15-150 keV) in 1 sec: 2.96912 ( -0.51619 0.5158 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36066e-07 ( -4.4152e-08 4.3358e-08 ) ergs/cm2
Band function
Time interval is from 17.388 sec. to 18.388 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.53326E-02 ( 0.528487 0.528487 )
beta : -1.50988 ( 1.48713 0.352653 )
Epeak [keV] : 50.7888 ( -51.1454 162.419 )
Norm@50keV : 0.161331 ( -0.171309 2.3705e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.17 using 59 PHA bins.
# Reduced chi-squared = 1.348 for 55 degrees of freedom
# Null hypothesis probability = 4.345190e-02
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] : 17.2218 (-3.22341 4.00439)
R^2/D10^2 : 0.220478 (-0.113669 0.229276)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.81 using 59 PHA bins.
# Reduced chi-squared = 1.453 for 57 degrees of freedom
# Null hypothesis probability = 1.439861e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.327e-08 4.498e-09
25- 50 5.932e-08 1.751e-08
50-150 1.261e-07 4.209e-08
15-150 1.987e-07 5.065e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 12.4826 (-2.02929 2.0291)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.58 using 59 PHA bins.
# Reduced chi-squared = 1.326 for 57 degrees of freedom
# Null hypothesis probability = 5.037225e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.110e-08 1.783e-08
25- 50 5.981e-08 3.344e-08
50-150 1.312e-07 7.405e-08
15-150 2.221e-07 1.235e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.83467 (-3.80575 6.21414)
R1^2/D10^2 : 1.99039 (-1.59085 18.7082)
kT2 [keV] : 29.3573 (-10.7077 -29.4251)
R2^2/D10^2 : 2.75440E-02 (-0.0270746 0.0673249)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.51 using 59 PHA bins.
# Reduced chi-squared = 1.355 for 55 degrees of freedom
# Null hypothesis probability = 4.104469e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.551e-08 1.517e-08
25- 50 5.969e-08 3.222e-08
50-150 1.502e-07 8.405e-08
15-150 2.354e-07 1.210e-07
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: 1.28205 ( -0.092149 0.0913393 )
Norm@50keV : 8.20483E-03 ( -0.000418841 0.000417965 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.32 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 57 degrees of freedom
# Null hypothesis probability = 4.264261e-01
Photon flux (15-150 keV) in 77.58 sec: 0.975697 ( -0.0542504 0.0545432 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.31808e-06 ( -3.32859e-07 3.33482e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20911 ( -0.364743 0.099553 )
Epeak [keV] : 588.105 ( -996.195 -996.195 )
Norm@50keV : 8.83148E-03 ( -0.000708066 0.00361354 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.36 using 59 PHA bins.
# Reduced chi-squared = 1.042 for 56 degrees of freedom
# Null hypothesis probability = 3.887577e-01
Photon flux (15-150 keV) in 77.58 sec: 0.968785 ( -0.051552 0.062595 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.30596e-06 ( -3.40398e-07 3.34517e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.02020 ( 9.0202 9.0202 )
beta : -1.28205 ( -0.0913381 0.0921493 )
Epeak [keV] : 81.9473 ( -81.9473 -81.9473 )
Norm@50keV : 1.11515 ( -0.0569266 0.0568073 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.32 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 55 degrees of freedom
# Null hypothesis probability = 3.541573e-01
Photon flux (15-150 keV) in 77.58 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) = 1.39e-06
S(50-100 keV) = 2.29e-06
T90 vs. Hardness ratio plot
T90 = 53.2000000476837 sec.
Hardness ratio (energy fluence ratio) = 1.64748
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.62096
Count Ratio (50-100 keV) / (15-25 keV) = 1.56044
Mask shadow pattern
IMX = 7.654619671080761E-01, IMY = -5.722318943621115E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 12.160000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 12.160000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 12.160000
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:
-239.336000 -38.984000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.1468 -60.5288 6.2 34.1 -91.6 0.7625 1.9 7.5 Cen X-3
186.7093 -62.7743 1.7 30.5 -105.3 1.9229 6.7 1.5 GX 301-2
244.9943 -15.6450 0.6 41.2 132.9 10.7369 17.8 0.9 Sco X-1
255.9938 -37.8416 1.8 41.7 169.8 2.2892 6.6 0.4 4U 1700-377
256.2596 -36.5287 0.0 42.2 167.9 0.5295 1.4 10.6 GX 349+2
262.8717 -24.6174 31.2 51.5 155.1 -0.3978 -0.4 10.7 GX 1+4
264.6097 -44.4384 9.2 46.9 -179.3 0.5245 1.3 5.7 4U 1735-44
262.9243 -33.8219 6.2 48.2 166.3 1.0757 1.9 3.3 GX 354-0
225.0038 -0.4576 3.6 39.1 93.9 2.5379 3.3 ------ UNKNOWN
217.1023 -4.4131 3.1 32.2 84.4 1.6641 3.7 ------ UNKNOWN
251.8589 -24.0150 2.5 42.7 148.5 2.6651 4.6 ------ UNKNOWN
195.2906 -61.6075 1.4 27.9 -112.0 2.2152 8.2 ------ UNKNOWN
146.5616 -6.8437 3.0 59.4 -17.2 4.6050 3.8 ------ UNKNOWN
263.8997 -67.5848 3.5 47.3 -147.5 1.5436 3.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-38.984000 38.600000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.5266 -60.5082 5.6 34.0 -91.8 0.4839 2.1 9.3 Cen X-3
186.7731 -62.7876 3.4 30.5 -105.4 -0.6218 -3.4 3.4 GX 301-2
245.1103 -15.7148 4.1 41.3 133.0 -1.0909 -2.8 8.8 Sco X-1
255.9347 -37.9109 17.0 41.6 169.9 0.1501 0.7 4.7 4U 1700-377
256.4479 -36.3633 5.9 42.4 167.8 0.4698 2.0 3.6 GX 349+2
263.0566 -24.7817 99.9 51.6 155.4 -0.0763 -0.1 3.4 GX 1+4
264.7874 -44.5201 5.1 47.0 -179.1 0.5817 2.3 4.6 4U 1735-44
263.1824 -33.9047 5.3 48.3 166.5 0.7198 2.2 10.5 GX 354-0
188.5387 6.9667 0.5 43.7 36.8 9.4345 24.7 ------ UNKNOWN
265.3551 -42.2689 2.5 47.8 178.0 1.1897 4.5 ------ UNKNOWN
159.9053 -33.6921 2.2 36.2 -42.7 0.9115 5.3 ------ UNKNOWN
232.5991 -70.9337 2.0 39.8 -135.0 1.1216 5.7 ------ UNKNOWN
253.4774 -76.0311 2.2 47.5 -135.2 2.0511 5.3 ------ UNKNOWN
143.1257 -30.3931 2.8 50.8 -44.4 2.3592 4.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
158.164600 334.964600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
191.0539 -8.1591 3.3 15.3 132.4 0.5206 3.5 ------ UNKNOWN
185.0416 7.1117 2.1 3.5 -125.6 0.8350 5.5 ------ UNKNOWN
136.2316 -8.6194 3.5 54.5 -144.1 3.7625 3.3 ------ UNKNOWN
153.1990 30.9862 3.0 40.9 -87.6 3.0363 3.8 ------ UNKNOWN
Plot creation:
Thu May 28 12:56:22 EDT 2015