Special notes of this burst
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
296.1081 -2.9517 0.0071 20.9280 -74.2895 0.5256219 26.761 TRIG_00573190
Foreground time interval of the image:
-0.248 1.800 (delta_t = 2.048 [sec])
Background time interval of the image:
-239.800 -0.248 (delta_t = 239.552 [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 0.064000
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 0.064000
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 0.064000
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 -0.248 sec. to 1.800 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80518 ( -0.112994 0.115307 )
Norm@50keV : 1.46266E-02 ( -0.00104532 0.00103521 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.73 using 59 PHA bins.
# Reduced chi-squared = 1.188 for 57 degrees of freedom
# Null hypothesis probability = 1.562711e-01
Photon flux (15-150 keV) in 2.048 sec: 2.01958 ( -0.131252 0.131367 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.75722e-07 ( -2.0005e-08 2.01569e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.248 sec. to 1.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23065 ( -0.538399 0.469471 )
Epeak [keV] : 60.6773 ( -12.126 64.7765 )
Norm@50keV : 3.00801E-02 ( -0.0131428 0.0287025 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.25 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 56 degrees of freedom
# Null hypothesis probability = 2.357580e-01
Photon flux (15-150 keV) in 2.048 sec: 1.97065 ( -0.13737 0.13713 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62128e-07 ( -2.27963e-08 2.29601e-08 ) ergs/cm2
Band function
Time interval is from -0.248 sec. to 1.800 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.831403 ( -0.735524 0.816184 )
beta : -2.17155 ( 2.17802 0.311696 )
Epeak [keV] : 48.2286 ( -21.8574 33.6622 )
Norm@50keV : 5.37090E-02 ( -0.0349654 990.672 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.77 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 55 degrees of freedom
# Null hypothesis probability = 2.471784e-01
Photon flux (15-150 keV) in 2.048 sec: 1.97497 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.63322e-07 ( -2.63307e-07 -2.18911e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.6353 (-0.848145 0.92339)
R^2/D10^2 : 0.543608 (-0.136004 0.179001)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 104.26 using 59 PHA bins.
# Reduced chi-squared = 1.8290 for 57 degrees of freedom
# Null hypothesis probability = 1.351676e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.178e-08 3.809e-09
25- 50 9.639e-08 7.096e-09
50-150 7.682e-08 1.254e-08
15-150 2.050e-07 1.538e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 98.4478 (-20.6042 30.6732)
Norm : 8.96227 (-0.803065 0.908483)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.21 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 57 degrees of freedom
# Null hypothesis probability = 2.663551e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.797e-08 5.530e-09
25- 50 8.269e-08 6.083e-09
50-150 1.328e-07 3.974e-08
15-150 2.635e-07 4.690e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.72731 (-1.8846 1.90262)
R1^2/D10^2 : 1.82164 (-0.770842 2.7951)
kT2 [keV] : 26.4023 (-8.15104 17.5975)
R2^2/D10^2 : 1.65361E-02 (-0.0133663 0.0375607)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.21 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 55 degrees of freedom
# Null hypothesis probability = 1.631089e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.319e-08 7.997e-09
25- 50 8.776e-08 1.615e-08
50-150 1.339e-07 6.064e-08
15-150 2.648e-07 7.315e-08
Peak spectrum fit
Power-law model
Time interval is from -0.268 sec. to 0.732 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70178 ( -0.100997 0.102466 )
Norm@50keV : 2.53259E-02 ( -0.00164061 0.00163117 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.19 using 59 PHA bins.
# Reduced chi-squared = 1.424 for 57 degrees of freedom
# Null hypothesis probability = 1.934430e-02
Photon flux (15-150 keV) in 1 sec: 3.36565 ( -0.207904 0.208078 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.34456e-07 ( -1.58436e-08 1.59315e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.268 sec. to 0.732 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.851592 ( -0.506432 0.446732 )
Epeak [keV] : 63.3738 ( -9.48919 21.1634 )
Norm@50keV : 7.18196E-02 ( -0.0298192 0.0610626 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.54 using 59 PHA bins.
# Reduced chi-squared = 1.242 for 56 degrees of freedom
# Null hypothesis probability = 1.055964e-01
Photon flux (15-150 keV) in 1 sec: 3.26457 ( -0.21461 0.21455 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.20581e-07 ( -1.7395e-08 1.7513e-08 ) ergs/cm2
Band function
Time interval is from -0.268 sec. to 0.732 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.851557 ( -0.412036 0.459889 )
beta : -10.00000 ( 10 5.81482e-08 )
Epeak [keV] : 63.3645 ( -8.48308 21.1531 )
Norm@50keV : 7.18174E-02 ( -0.0298184 0.061096 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.54 using 59 PHA bins.
# Reduced chi-squared = 1.264 for 55 degrees of freedom
# Null hypothesis probability = 8.978425e-02
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.2278e-07 ( -2.22773e-07 -1.7045e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.6033 (-0.844871 0.920329)
R^2/D10^2 : 0.704652 (-0.162428 0.206531)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 107.34 using 59 PHA bins.
# Reduced chi-squared = 1.8832 for 57 degrees of freedom
# Null hypothesis probability = 6.268889e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.374e-08 2.630e-09
25- 50 7.901e-08 5.545e-09
50-150 7.788e-08 1.002e-08
15-150 1.806e-07 1.200e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 126.120 (-27.848 38.1641)
Norm : 14.2842 (-1.05953 1.24964)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.99 using 59 PHA bins.
# Reduced chi-squared = 1.263 for 57 degrees of freedom
# Null hypothesis probability = 8.720978e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.712e-08 3.445e-09
25- 50 6.698e-08 5.580e-09
50-150 1.224e-07 3.712e-08
15-150 2.265e-07 4.215e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.27649 (-1.65897 1.51188)
R1^2/D10^2 : 2.25117 (-0.872762 2.06608)
kT2 [keV] : 25.8279 (-6.29698 12.4548)
R2^2/D10^2 : 3.16654E-02 (-0.0241556 0.0400793)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.63 using 59 PHA bins.
# Reduced chi-squared = 1.248 for 55 degrees of freedom
# Null hypothesis probability = 1.024075e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.217e-08 7.025e-09
25- 50 7.378e-08 1.265e-08
50-150 1.178e-07 5.104e-08
15-150 2.238e-07 6.345e-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: 1.80518 ( -0.112994 0.115307 )
Norm@50keV : 1.46266E-02 ( -0.00104532 0.00103521 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.73 using 59 PHA bins.
# Reduced chi-squared = 1.188 for 57 degrees of freedom
# Null hypothesis probability = 1.562711e-01
Photon flux (15-150 keV) in 2.048 sec: 2.01958 ( -0.131252 0.131367 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.75722e-07 ( -2.0005e-08 2.01569e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23065 ( -0.538399 0.469471 )
Epeak [keV] : 60.6773 ( -12.126 64.7765 )
Norm@50keV : 3.00801E-02 ( -0.0131428 0.0287025 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.25 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 56 degrees of freedom
# Null hypothesis probability = 2.357580e-01
Photon flux (15-150 keV) in 2.048 sec: 1.97065 ( -0.13737 0.13713 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62128e-07 ( -2.27963e-08 2.29601e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.831403 ( -0.735524 0.816184 )
beta : -2.17155 ( 2.17802 0.311696 )
Epeak [keV] : 48.2286 ( -21.8574 33.6622 )
Norm@50keV : 5.37090E-02 ( -0.0349654 1140.49 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.77 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 55 degrees of freedom
# Null hypothesis probability = 2.471784e-01
Photon flux (15-150 keV) in 2.048 sec: 1.97497 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.63322e-07 ( -2.63307e-07 -2.18911e-08 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 7.78e-08
S(50-100 keV) = 8.90e-08
T90 vs. Hardness ratio plot
T90 = 1.53600001335144 sec.
Hardness ratio (energy fluence ratio) = 1.14396
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.21238
Count Ratio (50-100 keV) / (15-25 keV) = 0.668146
Mask shadow pattern
IMX = 1.035513442390058E-01, IMY = 3.681357784116517E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-239.800000 -0.248000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
285.1395 -25.0538 16.0 36.4 -116.1 -0.2259 -0.7 9.8 HT1900.1-2455
288.7965 10.9710 1.1 32.4 -49.7 2.4964 11.0 1.5 GRS 1915+105
299.6895 35.2180 2.3 43.6 -10.4 1.3602 5.1 5.0 Cyg X-1
308.0930 40.9911 3.1 47.0 1.0 1.2147 3.8 2.4 Cyg X-3
326.3039 38.3729 10.0 44.5 20.6 0.3901 1.1 6.9 Cyg X-2
335.8663 -60.3777 4.6 56.9 179.2 3.2623 2.5 ------ UNKNOWN
291.8865 47.8651 3.0 57.5 -9.5 3.2433 3.9 ------ UNKNOWN
297.5492 -19.4153 2.5 23.6 -118.3 0.8537 4.7 ------ UNKNOWN
293.0792 -15.8992 2.3 25.7 -106.1 1.0907 5.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.248000 1.800000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
284.8869 -25.0199 8.2 36.5 -115.9 -0.0476 -1.4 10.1 HT1900.1-2455
288.7549 11.0470 4.2 32.5 -49.6 0.0611 2.8 6.6 GRS 1915+105
299.4308 35.2941 5.6 43.8 -10.6 -0.0517 -2.1 9.6 Cyg X-1
307.9653 40.9698 5.9 47.0 0.9 0.0653 2.0 6.7 Cyg X-3
326.1769 38.3311 4.4 44.4 20.5 -0.0837 -2.7 0.6 Cyg X-2
296.1082 -2.9517 0.4 20.9 -74.3 0.5255 26.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
54.100600 962.275400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4795 35.5088 3.8 54.8 -35.7 -7.7444 -3.1 10.0 Her X-1
263.0096 -24.7159 3.6 38.7 -121.4 3.0488 3.2 1.8 GX 1+4
264.9105 -44.4798 10.2 49.8 -145.2 -1.6089 -1.1 7.4 4U 1735-44
268.4206 -1.3134 5.8 27.8 -81.4 1.3166 2.0 8.9 SW J1753.5-0127
270.4398 -25.0715 9.0 33.2 -128.2 0.9007 1.3 8.5 GX 5-1
270.3044 -25.7701 3.2 33.7 -129.1 2.4862 3.6 1.6 GRS 1758-258
274.0319 -14.0458 3.0 24.5 -112.3 2.2031 3.8 1.6 GX 17+2
275.8939 -30.3689 4.3 33.5 -141.3 1.6292 2.7 1.6 H1820-303
285.1755 -24.7719 0.0 24.3 -149.2 0.6732 1.4 11.7 HT1900.1-2455
288.7936 10.9580 0.6 15.7 -21.9 9.5103 19.7 0.8 GRS 1915+105
299.6123 35.1988 1.0 38.3 10.4 7.8207 12.0 1.1 Cyg X-1
308.1024 40.9821 2.3 45.3 18.5 4.8443 5.0 1.8 Cyg X-3
326.0294 38.3853 20.9 49.7 36.6 -1.5222 -0.6 7.7 Cyg X-2
262.9991 -33.7704 4.8 43.7 -132.9 2.6760 2.4 3.9 GX 354-0
330.6182 9.8104 3.4 36.6 75.0 4.4252 3.4 ------ UNKNOWN
332.9271 -26.6415 3.5 42.4 133.4 5.4084 3.3 ------ UNKNOWN
312.6406 -39.2305 2.3 39.2 165.5 4.0839 5.1 ------ UNKNOWN
305.9855 0.3803 2.9 10.4 77.2 1.6693 4.0 ------ UNKNOWN
292.5562 46.6571 2.8 49.7 2.6 4.4986 4.2 ------ UNKNOWN
291.8105 5.3655 3.9 9.4 -21.8 1.3197 2.9 ------ UNKNOWN
298.0071 -56.3643 3.0 53.4 -175.4 5.6867 3.9 ------ UNKNOWN
UNKNOWN
UNKNOWN
UNKNOWN
Plot creation:
Sat May 30 15:24:23 EDT 2015