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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
216.5359 5.8525 0.0185 38.4594 -46.5122 1.3109695 10.373 TRIG_00530031
Foreground time interval of the image:
-13.392 34.608 (delta_t = 48.000 [sec])
Background time interval of the image:
-239.392 -13.392 (delta_t = 226.000 [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 8.192000
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 8.192000
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 8.192000
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 -13.392 sec. to 34.608 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21311 ( -0.26947 0.258123 )
Norm@50keV : 1.73226E-03 ( -0.000269435 0.000268486 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.07 using 59 PHA bins.
# Reduced chi-squared = 1.124 for 57 degrees of freedom
# Null hypothesis probability = 2.423831e-01
Photon flux (15-150 keV) in 48 sec: 0.203719 ( -0.0335481 0.033928 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.4048e-07 ( -1.34301e-07 1.35149e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -13.392 sec. to 34.608 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.182884 ( -1.51801 1.10672 )
Epeak [keV] : 94.8131 ( -29.8052 -94.8114 )
Norm@50keV : 5.26840E-03 ( -0.00526847 0.0203842 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.63 using 59 PHA bins.
# Reduced chi-squared = 1.101 for 56 degrees of freedom
# Null hypothesis probability = 2.816174e-01
Photon flux (15-150 keV) in 48 sec: 0.194051 ( -0.03484 0.035371 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.86701e-07 ( -1.51267e-07 1.50034e-07 ) ergs/cm2
Band function
Time interval is from -13.392 sec. to 34.608 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97362 ( -5.42458 -4.97362 )
beta : -1.47275 ( -0.500048 0.338184 )
Epeak [keV] : 34.0874 ( -8.49266 21.6016 )
Norm@50keV : 23.4867 ( -3.51825 109.642 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.80 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 55 degrees of freedom
# Null hypothesis probability = 3.380231e-01
Photon flux (15-150 keV) in 48 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.12678e-07 ( -8.12342e-07 -1.3835e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.1538 (-3.07074 4.01947)
R^2/D10^2 : 1.30220E-02 (-0.00645004 0.0116588)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.93 using 59 PHA bins.
# Reduced chi-squared = 1.139 for 57 degrees of freedom
# Null hypothesis probability = 2.198196e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.113e-08 1.249e-08
25- 50 1.914e-07 5.026e-08
50-150 4.589e-07 1.305e-07
15-150 6.915e-07 1.588e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 0.874239 (-0.13614 0.1361)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.62 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 57 degrees of freedom
# Null hypothesis probability = 1.586100e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.046e-07 5.839e-08
25- 50 2.011e-07 1.152e-07
50-150 4.411e-07 2.482e-07
15-150 7.468e-07 4.159e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.1007 (-6.14109 5.39809)
R1^2/D10^2 : 3.69768E-02 (-0.0180101 0.174607)
kT2 [keV] : 48.5813 (-51.2365 -51.2366)
R2^2/D10^2 : 3.57303E-04 (-0.000285169 0.00861831)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.12 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 55 degrees of freedom
# Null hypothesis probability = 2.957425e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.952e-08 3.475e-08
25- 50 2.072e-07 1.204e-07
50-150 5.400e-07 2.702e-07
15-150 8.068e-07 4.030e-07
Peak spectrum fit
Power-law model
Time interval is from 10.108 sec. to 11.108 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75848 ( -1.52642 -1.52642 )
Norm@50keV : 1.30162E-03 ( -0.00130165 0.0018086 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.09 using 59 PHA bins.
# Reduced chi-squared = 0.8437 for 57 degrees of freedom
# Null hypothesis probability = 7.935663e-01
Photon flux (15-150 keV) in 1 sec: 0.168072 ( -0.173864 0.234092 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2534e-08 ( -1.19319e-08 1.82634e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.108 sec. to 11.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.52751 ( )
Epeak [keV] : 35.5659 ( -50.2944 -50.2944 )
Norm@50keV : 3.45454 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.55 using 59 PHA bins.
# Reduced chi-squared = 0.8492 for 56 degrees of freedom
# Null hypothesis probability = 7.817763e-01
Photon flux (15-150 keV) in 1 sec: 0.180327 ( -0.180327 0.186598 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.24878e-09 ( -8.24878e-09 1.8142e-08 ) ergs/cm2
Band function
Time interval is from 10.108 sec. to 11.108 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.38453 ( -0.629145 -0.629145 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 33.4615 ( -50.9891 -50.9891 )
Norm@50keV : 17.5516 ( -17.0045 333.858 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.47 using 59 PHA bins.
# Reduced chi-squared = 0.8631 for 55 degrees of freedom
# Null hypothesis probability = 7.546319e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.10565e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.1772 (-12.2629 -12.2629)
R^2/D10^2 : 4.63709E-02 (-0.0445882 -0.0445882)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.63 using 59 PHA bins.
# Reduced chi-squared = 0.8356 for 57 degrees of freedom
# Null hypothesis probability = 8.071171e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.456e-09 1.230e-09
25- 50 4.661e-09 3.835e-09
50-150 4.196e-09 3.883e-09
15-150 1.031e-08 1.047e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 96.0256 (-98.8641 -98.8641)
Norm : 0.827117 (-0.815014 -0.815014)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.91 using 59 PHA bins.
# Reduced chi-squared = 0.8406 for 57 degrees of freedom
# Null hypothesis probability = 7.988985e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.161e-09 1.722e-09
25- 50 3.706e-09 2.777e-09
50-150 5.867e-09 6.635e-09
15-150 1.174e-08 1.028e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.00011E-04 ( )
R1^2/D10^2 : 1.02550E-04 (-0.000102654 -0.000102654)
kT2 [keV] : 12.1958 (-12.3613 -12.3613)
R2^2/D10^2 : 4.61295E-02 (-0.0437929 -0.0437929)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.64 using 59 PHA bins.
#Fit statistic : Chi-Squared = 47.63 using 59 PHA bins.
# Reduced chi-squared = 0.8663 for 55 degrees of freedom
# Reduced chi-squared = 0.8660 for 55 degrees of freedom
# Null hypothesis probability = 7.488510e-01
# Null hypothesis probability = 7.492959e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.716e-09 2.162e-09
25- 50 4.827e-09 1.531e-08
50-150 3.264e-09 6.905e-09
15-150 9.807e-09 2.086e-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: 1.21311 ( -0.26947 0.258123 )
Norm@50keV : 1.73226E-03 ( -0.000269435 0.000268486 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.07 using 59 PHA bins.
# Reduced chi-squared = 1.124 for 57 degrees of freedom
# Null hypothesis probability = 2.423831e-01
Photon flux (15-150 keV) in 48 sec: 0.203719 ( -0.0335481 0.033928 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.4048e-07 ( -1.34301e-07 1.35149e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.182884 ( -1.51801 1.10672 )
Epeak [keV] : 94.8131 ( -29.8052 -94.8114 )
Norm@50keV : 5.26840E-03 ( -0.00526847 0.0203842 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.63 using 59 PHA bins.
# Reduced chi-squared = 1.101 for 56 degrees of freedom
# Null hypothesis probability = 2.816174e-01
Photon flux (15-150 keV) in 48 sec: 0.194051 ( -0.03484 0.035371 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.86701e-07 ( -1.51267e-07 1.50034e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97362 ( -5.4238 -4.97362 )
beta : -1.47275 ( -0.500048 0.338184 )
Epeak [keV] : 34.0874 ( -8.49266 21.6016 )
Norm@50keV : 23.4867 ( -3.51825 109.642 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.80 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 55 degrees of freedom
# Null hypothesis probability = 3.380231e-01
Photon flux (15-150 keV) in 48 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.12678e-07 ( -8.12342e-07 -1.3835e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.78e-07
S(50-100 keV) = 3.07e-07
T90 vs. Hardness ratio plot
T90 = 48 sec.
Hardness ratio (energy fluence ratio) = 1.72472
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 3.96992
Count Ratio (50-100 keV) / (15-25 keV) = 3.12169
Mask shadow pattern
IMX = 5.466238681313339E-01, IMY = 5.762675584740097E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
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:
-239.392000 -13.392000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3226 -60.6305 83.0 52.4 -164.3 0.0935 0.1 0.5 Cen X-3
186.6381 -62.8095 1.8 45.6 -169.9 2.8671 6.5 2.4 GX 301-2
244.9804 -15.6446 0.2 16.6 22.2 14.3390 63.7 0.3 Sco X-1
256.0681 -37.8201 1.8 20.5 104.0 1.7272 6.5 4.1 4U 1700-377
256.4292 -36.4896 9.5 20.4 100.1 0.3354 1.2 4.0 GX 349+2
263.1700 -24.7930 4.1 26.3 70.3 0.8600 2.8 9.2 GX 1+4
264.9509 -44.4097 11.7 29.1 112.9 -0.3555 -1.0 9.2 4U 1735-44
268.2412 -1.5405 8.3 42.5 38.5 0.7656 1.4 9.3 SW J1753.5-0127
270.2374 -25.0486 6.6 32.5 74.2 0.7019 1.8 3.1 GX 5-1
270.1695 -25.8361 41.0 32.2 75.6 0.1111 0.3 9.1 GRS 1758-258
274.0293 -14.0609 4.8 39.9 59.1 1.6167 2.4 2.0 GX 17+2
275.9063 -30.4888 18.9 36.3 85.4 0.3838 0.6 7.4 H1820-303
263.1664 -33.7855 8.6 25.4 90.9 -0.4029 -1.3 9.3 GX 354-0
264.4516 16.8604 2.8 54.3 18.8 5.0232 4.2 ------ UNKNOWN
264.4196 16.6141 2.4 54.1 18.9 5.9731 4.9 ------ UNKNOWN
235.2937 21.9655 2.4 50.8 -16.3 2.3622 4.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-13.392000 34.608000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.1098 -60.7937 324.4 52.5 -164.4 0.0073 0.0 11.9 Cen X-3
186.4422 -62.7259 3.7 45.6 -169.8 -0.4400 -3.2 6.5 GX 301-2
244.8387 -15.5845 5.0 16.6 21.7 0.1764 2.3 8.8 Sco X-1
255.8121 -37.8495 5.1 20.3 104.2 0.2157 2.3 8.3 4U 1700-377
256.4479 -36.5574 6.2 20.4 100.3 0.1791 1.9 8.1 GX 349+2
262.8526 -24.6141 77.0 26.1 69.7 -0.0167 -0.2 11.6 GX 1+4
264.6827 -44.4152 7.1 29.0 113.1 -0.2005 -1.6 3.3 4U 1735-44
268.3645 -1.3096 5.5 42.8 38.4 0.4238 2.1 8.6 SW J1753.5-0127
270.3353 -25.1172 7.7 32.5 74.3 0.2405 1.5 3.6 GX 5-1
270.2417 -25.6845 15.8 32.3 75.3 -0.1200 -0.7 4.8 GRS 1758-258
273.8939 -13.9082 3.8 39.8 58.8 -0.7300 -3.1 10.1 GX 17+2
276.0474 -30.2620 4.2 36.5 85.0 -0.6370 -2.8 8.9 H1820-303
262.9924 -33.7739 10.7 25.3 90.9 0.1246 1.1 3.6 GX 354-0
216.5358 5.8525 1.1 38.5 -46.5 1.3111 10.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
106.908590 362.738000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9932 -15.6524 2.0 35.4 111.9 14.8073 5.7 1.1 Sco X-1
254.4664 35.3335 29.5 45.7 28.8 1.0722 0.4 0.7 Her X-1
247.3798 55.2397 2.2 55.2 5.1 24.6099 5.2 ------ UNKNOWN
227.2499 49.7405 2.9 44.9 -5.9 6.9688 4.0 ------ UNKNOWN
218.9175 51.1876 2.9 45.4 -13.6 8.1123 3.9 ------ UNKNOWN
190.2927 30.3502 3.4 34.8 -57.7 5.8592 3.4 ------ UNKNOWN
Plot creation:
Sat May 30 18:51:15 EDT 2015