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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
290.5431 -64.6003 0.0174 21.2058 -58.5979 0.6764293 11.073 TRIG_00575707
Foreground time interval of the image:
-13.499 17.000 (delta_t = 30.499 [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)
The mask-weighted light curves based on cleaned DPHs
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 -111.000 sec. to 17.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84237 ( -0.177414 0.183502 )
Norm@50keV : 1.02773E-03 ( -0.000118106 0.000115936 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.70 using 59 PHA bins.
# Reduced chi-squared = 0.9420 for 57 degrees of freedom
# Null hypothesis probability = 5.998148e-01
Photon flux (15-150 keV) in 128 sec: 0.144014 ( -0.0140177 0.0140243 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.20972e-06 ( -1.38244e-07 1.408e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -111.000 sec. to 17.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43612 ( -0.85654 0.696687 )
Epeak [keV] : 59.1993 ( -21.6447 -59.2021 )
Norm@50keV : 1.75053E-03 ( -0.000809109 0.0036697 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.75 using 59 PHA bins.
# Reduced chi-squared = 0.9419 for 56 degrees of freedom
# Null hypothesis probability = 5.987559e-01
Photon flux (15-150 keV) in 128 sec: 0.141420 ( -0.014483 0.01468 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15415e-06 ( -1.66522e-07 1.69302e-07 ) ergs/cm2
Band function
Time interval is from -111.000 sec. to 17.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.45357 ( -3.06174 0.572155 )
beta : -9.37167 ( 9.37167 19.3717 )
Epeak [keV] : 60.2577 ( -21.5653 -60.2347 )
Norm@50keV : 1.70781E-03 ( -0.00080779 0.000902103 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.75 using 59 PHA bins.
# Reduced chi-squared = 0.9591 for 55 degrees of freedom
# Null hypothesis probability = 5.610977e-01
Photon flux (15-150 keV) in 128 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16332e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.3584 (-1.15323 1.34244)
R^2/D10^2 : 5.87545E-02 (-0.0218204 0.0334696)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.78 using 59 PHA bins.
# Reduced chi-squared = 1.259 for 57 degrees of freedom
# Null hypothesis probability = 8.995316e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.662e-07 2.822e-08
25- 50 4.339e-07 5.235e-08
50-150 2.505e-07 6.355e-08
15-150 8.506e-07 1.014e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 87.2885 (-25.6802 47.3021)
Norm : 0.657588 (-0.0911126 0.112061)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.77 using 59 PHA bins.
# Reduced chi-squared = 0.9257 for 57 degrees of freedom
# Null hypothesis probability = 6.344922e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.194e-07 3.110e-08
25- 50 3.686e-07 4.058e-08
50-150 5.506e-07 2.312e-07
15-150 1.139e-06 2.328e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.71112 (-1.97158 1.91047)
R1^2/D10^2 : 0.217131 (-0.0825842 0.215927)
kT2 [keV] : 23.2575 (-11.0942 41.2186)
R2^2/D10^2 : 1.75312E-03 (-0.000740213 0.00391805)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.63 using 59 PHA bins.
# Reduced chi-squared = 0.9387 for 55 degrees of freedom
# Null hypothesis probability = 6.042125e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.140e-07 1.204e-07
25- 50 3.615e-07 1.809e-07
50-150 5.167e-07 3.012e-07
15-150 1.092e-06 5.871e-07
Peak spectrum fit
Power-law model
Time interval is from -55.500 sec. to -54.500 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17453 ( -0.796575 0.712817 )
Norm@50keV : 2.12742E-03 ( -0.00100097 0.000998274 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.44 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 57 degrees of freedom
# Null hypothesis probability = 3.528376e-01
Photon flux (15-150 keV) in 1 sec: 0.248570 ( -0.116924 0.120777 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.17721e-08 ( -1.06671e-08 1.10368e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -55.500 sec. to -54.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99919 ( 9.99973 9.2331 )
Epeak [keV] : 41.3063 ( -6.44891 25.3623 )
Norm@50keV : 7059.03 ( -7098.62 41555.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.55 using 59 PHA bins.
# Reduced chi-squared = 0.9919 for 56 degrees of freedom
# Null hypothesis probability = 4.920125e-01
Photon flux (15-150 keV) in 1 sec: 0.212050 ( -0.08501 0.087236 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28303e-08 ( -5.13761e-09 8.4781e-09 ) ergs/cm2
Band function
Time interval is from -55.500 sec. to -54.500 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -6.11039 -5 )
beta : -2.72449 ( 2.71776 1.51587 )
Epeak [keV] : 44.2869 ( -11.6501 14.2758 )
Norm@50keV : 9.05265 ( -3.59447 41.4447 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.72 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.476899e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95049e-08 ( -1.94979e-08 -9.75484e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.9120 (-5.03745 10.9258)
R^2/D10^2 : 3.43021E-02 (-0.0343021 0.110103)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.05 using 59 PHA bins.
# Reduced chi-squared = 1.018 for 57 degrees of freedom
# Null hypothesis probability = 4.365553e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.599e-09 1.044e-09
25- 50 6.317e-09 4.196e-09
50-150 9.534e-09 6.720e-09
15-150 1.745e-08 1.147e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 1.04762 (-0.498146 0.498146)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.76 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 57 degrees of freedom
# Null hypothesis probability = 3.421967e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.609e-09 1.825e-09
25- 50 5.018e-09 3.351e-09
50-150 1.101e-08 7.230e-09
15-150 1.863e-08 1.213e-08
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.05 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.92 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.90 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.89 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 55 degrees of freedom
# Reduced chi-squared = 1.053 for 55 degrees of freedom
# Reduced chi-squared = 1.053 for 55 degrees of freedom
# Reduced chi-squared = 1.053 for 55 degrees of freedom
# Null hypothesis probability = 3.637322e-01
# Null hypothesis probability = 3.681225e-01
# Null hypothesis probability = 3.686317e-01
# Null hypothesis probability = 3.690496e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
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: 1.78620 ( -0.219459 0.229644 )
Norm@50keV : 1.42479E-03 ( -0.00021907 0.000214763 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.56 using 59 PHA bins.
# Reduced chi-squared = 1.326 for 57 degrees of freedom
# Null hypothesis probability = 5.047396e-02
Photon flux (15-150 keV) in 30.5 sec: 0.195292 ( -0.0250968 0.0250979 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.00276e-07 ( -6.20025e-08 6.37319e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.398613 ( -1.6368 1.15206 )
Epeak [keV] : 46.4798 ( -9.25609 36.4883 )
Norm@50keV : 9.37339E-03 ( -0.0093832 0.0822495 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.13 using 59 PHA bins.
# Reduced chi-squared = 1.270 for 56 degrees of freedom
# Null hypothesis probability = 8.383613e-02
Photon flux (15-150 keV) in 30.5 sec: 0.186359 ( -0.025887 0.026047 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.43897e-07 ( -6.53609e-08 7.59633e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 7.08850E-02 ( -1.41459 -0.0942821 )
beta : -2.58837 ( 2.58542 0.739199 )
Epeak [keV] : 41.7573 ( -16.9286 28.0234 )
Norm@50keV : 1.93872E-02 ( -0.0219128 43.348 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.05 using 59 PHA bins.
# Reduced chi-squared = 1.274 for 55 degrees of freedom
# Null hypothesis probability = 8.313453e-02
Photon flux (15-150 keV) in 30.5 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.61767e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 3.46e-07
S(50-100 keV) = 3.86e-07
T90 vs. Hardness ratio plot
T90 = 112 sec.
Hardness ratio (energy fluence ratio) = 1.11561
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.2799
Count Ratio (50-100 keV) / (15-25 keV) = 0.686293
Mask shadow pattern
IMX = 2.021591177065915E-01, IMY = 3.311626777814657E-01
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:
-13.499370 17.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
264.7285 -44.4868 3.5 45.4 -48.5 -0.5296 -3.4 2.3 4U 1735-44
275.9577 -30.2676 15.5 52.7 -28.4 0.1423 0.7 6.2 H1820-303
285.1157 -24.8337 5.3 53.8 -16.3 -0.3317 -2.2 6.8 HT1900.1-2455
290.5431 -64.6003 1.0 21.2 -58.6 0.6764 11.1 ------ UNKNOWN
136.8990 -73.0535 1.9 40.9 -137.0 0.6201 6.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
117.500580 963.104500
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3283 -60.6230 10.2 47.1 -147.0 -1.5124 -1.1 0.4 Cen X-3
186.7058 -62.8382 2.9 40.8 -139.7 3.8424 3.9 4.3 GX 301-2
255.9826 -37.8334 1.6 33.6 -56.4 6.1469 7.2 0.7 4U 1700-377
256.5008 -36.5927 7.6 34.5 -54.8 1.3472 1.5 10.7 GX 349+2
263.1345 -24.7628 6.2 43.6 -39.7 1.7945 1.9 6.9 GX 1+4
264.5424 -44.4131 5.7 24.8 -50.6 1.2479 2.0 8.9 4U 1735-44
270.3234 -25.0655 3.4 41.6 -30.5 2.9060 3.5 2.3 GX 5-1
270.2706 -25.7615 3.1 41.0 -30.8 2.9405 3.7 2.1 GRS 1758-258
273.8255 -14.1622 0.0 51.7 -23.2 -0.3939 -0.3 12.9 GX 17+2
275.8392 -30.4105 3.4 35.4 -24.5 2.4012 3.4 5.2 H1820-303
285.1378 -25.0766 0.0 39.7 -10.0 -0.1396 -0.2 10.9 HT1900.1-2455
263.0287 -33.7009 6.7 35.1 -44.2 1.2792 1.7 8.3 GX 354-0
12.7092 -87.7282 3.7 25.2 172.3 2.0682 3.2 ------ UNKNOWN
284.4920 -7.5570 3.7 57.2 -9.5 7.3270 3.1 ------ UNKNOWN
137.5530 -63.2217 3.1 50.6 -167.0 5.6863 3.7 ------ UNKNOWN
259.0799 -20.5949 2.4 48.7 -42.9 8.4299 4.8 ------ UNKNOWN
Plot creation:
Sat May 30 15:20:38 EDT 2015