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
244.9691 -28.6657 0.0311 22.3960 164.0388 0.3714940 6.153 TRIG_00345551
Foreground time interval of the image:
-7.432 16.568 (delta_t = 24.000 [sec])
Background time interval of the image:
-486.331 -447.371 (delta_t = 38.961 [sec])
-60.432 -7.432 (delta_t = 53.000 [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 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 -7.432 sec. to 16.568 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.985495 ( -0.430372 0.390256 )
Norm@50keV : 1.02220E-03 ( -0.00023269 0.000227739 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.32 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 57 degrees of freedom
# Null hypothesis probability = 3.568124e-01
Photon flux (15-150 keV) in 24 sec: 0.117613 ( -0.0268884 0.027229 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.66621e-07 ( -6.04838e-08 6.12682e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.432 sec. to 16.568 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.534486 ( -3.42875 -0.544238 )
Epeak [keV] : 177.626 ( -182.777 -182.777 )
Norm@50keV : 1.65438E-03 ( -0.000803574 1.16006 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.23 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 56 degrees of freedom
# Null hypothesis probability = 3.254835e-01
Photon flux (15-150 keV) in 24 sec: 0.115212 ( -0.03742 0.029136 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.58413e-07 ( -1.04148e-07 6.8304e-08 ) ergs/cm2
Band function
Time interval is from -7.432 sec. to 16.568 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.89291 ( -4.89291 -4.89291 )
beta : -1.78920 ( -1.73337 0.816543 )
Epeak [keV] : 54.5973 ( -54.5973 11.8783 )
Norm@50keV : 0.794340 ( -0.16694 6.7843 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.83 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 55 degrees of freedom
# Null hypothesis probability = 3.712756e-01
Photon flux (15-150 keV) in 24 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] : 19.2437 (-4.35245 7.29921)
R^2/D10^2 : 6.41689E-03 (-0.00414916 0.00875929)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.22 using 59 PHA bins.
# Reduced chi-squared = 1.074 for 57 degrees of freedom
# Null hypothesis probability = 3.271644e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.116e-08 5.981e-09
25- 50 5.415e-08 2.336e-08
50-150 1.477e-07 7.049e-08
15-150 2.130e-07 8.552e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-67.1357 -200)
Norm : 0.497382 (-0.112219 0.112219)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.85 using 59 PHA bins.
# Reduced chi-squared = 1.155 for 57 degrees of freedom
# Null hypothesis probability = 1.973143e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.975e-08 1.798e-08
25- 50 5.723e-08 3.347e-08
50-150 1.255e-07 7.290e-08
15-150 2.125e-07 1.220e-07
Double BB
R1^2/D10^2 : 1.34478E-02 (-0.00786523 0.0231402)
kT2 [keV] : 198.062 (-198.176 -198.176)
R2^2/D10^2 : 1.89068E-05 (-1.0812e-05 0.0004903)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.51 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.62 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.59 using 59 PHA bins.
# Reduced chi-squared = 1.100 for 55 degrees of freedom
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 2.836091e-01
# Null hypothesis probability = 4.143143e-01
# Null hypothesis probability = 4.154830e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.626e-08 6.976e-09
25- 50 5.152e-08 2.707e-08
50-150 1.527e-07 8.462e-08
15-150 2.204e-07 1.048e-07
Peak spectrum fit
Power-law model
Time interval is from 5.568 sec. to 6.568 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54926 ( -1.07766 1.00501 )
Norm@50keV : 2.12660E-03 ( -0.0021266 0.00111089 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.79 using 59 PHA bins.
# Reduced chi-squared = 0.8910 for 57 degrees of freedom
# Null hypothesis probability = 7.058076e-01
Photon flux (15-150 keV) in 1 sec: 0.269156 ( -0.137808 0.138945 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.00222e-08 ( -1.10359e-08 1.19165e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.568 sec. to 6.568 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -5.74059 ( -1.44267 0.999684 )
Epeak [keV] : 33.9166 ( -9999.36 -9999.36 )
Norm@50keV : 147.115 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.10 using 59 PHA bins.
# Reduced chi-squared = 0.8946 for 56 degrees of freedom
# Null hypothesis probability = 6.966740e-01
Photon flux (15-150 keV) in 1 sec: 0.269260 ( -0.138059 0.1377 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.99729e-08 ( -1.99729e-08 1.18229e-08 ) ergs/cm2
Band function
Time interval is from 5.568 sec. to 6.568 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -2.44492 ( 2.44521 1.62077 )
Epeak [keV] : 32.2814 ( -32.2813 56.5609 )
Norm@50keV : 62.5225 ( -29.7814 2.74756e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.57 using 59 PHA bins.
# Reduced chi-squared = 0.9013 for 55 degrees of freedom
# Null hypothesis probability = 6.813641e-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] : 9.26534 (-3.30544 10.1536)
R^2/D10^2 : 0.177641 (-0.177641 0.787904)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.89 using 59 PHA bins.
# Reduced chi-squared = 0.8928 for 57 degrees of freedom
# Null hypothesis probability = 7.023929e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.012e-09 2.139e-09
25- 50 6.695e-09 4.535e-09
50-150 2.789e-09 2.537e-09
15-150 1.250e-08 8.340e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 196.000 (-194.015 -194.015)
Norm : 1.09462 (-0.554282 1.39128)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.83 using 59 PHA bins.
# Reduced chi-squared = 0.8918 for 57 degrees of freedom
# Null hypothesis probability = 7.043632e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.732e-09 1.821e-09
25- 50 5.244e-09 3.448e-09
50-150 1.144e-08 7.340e-09
15-150 1.941e-08 1.290e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 198.889 (-198.903 -198.903)
R1^2/D10^2 : 4.28068E-05 (-4.29329e-05 0.394405)
kT2 [keV] : 8.12077 (-1.66911 5.49846)
R2^2/D10^2 : 0.263134 (-0.152304 1.43299)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.77 using 59 PHA bins.
# Reduced chi-squared = 0.8868 for 55 degrees of freedom
# Null hypothesis probability = 7.100164e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.227e-09 2.284e-09
25- 50 6.162e-09 4.307e-09
50-150 1.287e-08 1.949e-09
15-150 2.226e-08 7.750e-09
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: 0.985495 ( -0.430372 0.390256 )
Norm@50keV : 1.02220E-03 ( -0.00023269 0.000227739 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.32 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 57 degrees of freedom
# Null hypothesis probability = 3.568124e-01
Photon flux (15-150 keV) in 24 sec: 0.117613 ( -0.0268884 0.027229 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.66621e-07 ( -6.04838e-08 6.12682e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.534486 ( -3.42875 -0.544238 )
Epeak [keV] : 177.626 ( -182.777 -182.777 )
Norm@50keV : 1.65438E-03 ( -0.000803574 1.16006 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.23 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 56 degrees of freedom
# Null hypothesis probability = 3.254835e-01
Photon flux (15-150 keV) in 24 sec: 0.115212 ( -0.03742 0.029136 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.58413e-07 ( -1.04148e-07 6.8304e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.89291 ( -4.89291 -4.89291 )
beta : -1.78920 ( -1.73337 0.816543 )
Epeak [keV] : 54.5973 ( -54.5973 11.8783 )
Norm@50keV : 0.794340 ( -0.16694 6.7843 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.83 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 55 degrees of freedom
# Null hypothesis probability = 3.712756e-01
Photon flux (15-150 keV) in 24 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) = 4.89e-08
S(50-100 keV) = 9.88e-08
T90 vs. Hardness ratio plot
T90 = 22 sec.
Hardness ratio (energy fluence ratio) = 2.02045
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.83513
Count Ratio (50-100 keV) / (15-25 keV) = 1.67468
Mask shadow pattern
IMX = -3.962020593369289E-01, IMY = -1.133190881750955E-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:
-486.331400 -447.370700
-60.432000 -7.432000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4068 -60.5058 3.4 40.3 29.7 0.7795 3.4 7.5 Cen X-3
186.6660 -62.7857 2.0 32.3 29.1 0.9316 5.7 1.0 GX 301-2
244.9610 -15.6570 0.5 35.4 163.7 3.7822 23.6 1.5 Sco X-1
256.0107 -37.8797 1.0 15.5 -160.9 1.1634 11.5 2.4 4U 1700-377
256.4215 -36.2916 4.4 17.1 -162.4 0.2857 2.6 7.9 GX 349+2
262.8921 -24.8727 4.6 29.8 -161.9 0.3093 2.5 9.9 GX 1+4
264.8462 -44.6006 6.6 15.1 -124.6 0.1973 1.8 10.1 4U 1735-44
268.2687 -1.3251 8.8 53.7 -167.1 -0.3891 -1.3 9.7 SW J1753.5-0127
270.2953 -25.2051 4.8 32.6 -150.0 0.3156 2.4 7.6 GX 5-1
270.1506 -25.6931 7.2 32.1 -149.8 0.2151 1.7 8.7 GRS 1758-258
274.0346 -14.0327 3.1 44.1 -153.6 0.7554 3.7 1.7 GX 17+2
275.9299 -30.3708 27.1 31.2 -136.7 0.0616 0.4 0.3 H1820-303
285.0766 -24.7884 5.3 40.6 -131.9 -0.4672 -2.2 8.2 HT1900.1-2455
262.8166 -33.8629 16.0 21.8 -152.3 0.0843 0.7 8.8 GX 354-0
197.7887 -33.3421 2.5 38.0 82.2 1.7378 4.7 ------ UNKNOWN
162.5716 -75.4697 2.6 39.2 5.9 0.7461 4.4 ------ UNKNOWN
217.5123 -74.2267 3.6 25.7 -0.8 0.3563 3.2 ------ UNKNOWN
20.9700 -84.0593 3.4 43.4 -23.2 0.5900 3.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-7.432000 16.568000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.0191 -60.5350 0.0 40.5 29.6 -0.0659 -0.6 10.2 Cen X-3
186.8792 -62.6227 4.7 32.2 29.4 0.2014 2.4 10.8 GX 301-2
245.1304 -15.5500 6.2 35.5 163.9 0.1562 1.9 10.3 Sco X-1
255.9170 -37.7343 12.3 15.6 -161.4 0.0474 0.9 7.4 4U 1700-377
256.5342 -36.5879 5.1 16.9 -161.7 0.1171 2.3 11.0 GX 349+2
263.0070 -24.7462 9.6 29.9 -161.8 0.0704 1.2 0.1 GX 1+4
264.9511 -44.4320 7.7 15.2 -125.0 0.0862 1.5 9.0 4U 1735-44
268.3874 -1.4154 6.7 53.6 -166.9 -0.2572 -1.7 2.5 SW J1753.5-0127
270.2494 -25.0365 17.9 32.7 -150.2 -0.0426 -0.6 3.2 GX 5-1
270.1433 -25.5867 121.3 32.2 -149.9 -0.0064 -0.1 12.7 GRS 1758-258
274.1232 -14.0040 4.0 44.1 -153.5 -0.2778 -2.8 7.1 GX 17+2
275.9298 -30.3647 1453.1 31.2 -136.7 -0.0005 -0.0 0.3 H1820-303
284.9693 -25.0053 21.5 40.4 -131.8 -0.0546 -0.5 6.2 HT1900.1-2455
263.0674 -33.9903 5.7 21.8 -151.6 0.1120 2.0 10.1 GX 354-0
234.0167 -22.2664 2.6 29.9 143.2 0.3516 4.5 ------ UNKNOWN
244.9672 -28.6639 1.9 22.4 164.0 0.3673 6.1 ------ UNKNOWN
255.4341 5.2585 3.0 57.1 175.9 1.2995 3.8 ------ UNKNOWN
288.7881 -48.6808 2.4 28.3 -94.4 0.3801 4.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
111.068600 302.640400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.7720 -62.8269 4.6 50.4 19.6 1.5201 2.5 4.6 GX 301-2
244.9780 -15.6524 0.2 13.0 169.3 9.4495 58.6 0.7 Sco X-1
255.9845 -37.8325 0.9 13.0 -52.7 2.1885 12.8 0.7 4U 1700-377
256.3987 -36.4376 2.5 12.4 -58.6 0.7913 4.7 2.0 GX 349+2
263.1519 -24.7006 4.8 16.7 -110.1 0.4270 2.4 8.2 GX 1+4
264.8540 -44.3546 8.2 22.3 -50.5 0.2752 1.4 7.4 4U 1735-44
268.4094 -1.4358 2.5 35.2 -147.1 1.0955 4.7 2.7 SW J1753.5-0127
270.1694 -25.0709 4.0 22.7 -103.8 0.6198 2.9 6.3 GX 5-1
270.2889 -25.7151 5.5 22.6 -102.1 0.4549 2.1 1.8 GRS 1758-258
274.0226 -14.0510 1.9 30.6 -123.0 1.4505 6.0 1.3 GX 17+2
275.9024 -30.2926 5.5 26.9 -89.5 0.5109 2.1 4.6 H1820-303
285.0249 -25.0154 7.8 35.7 -96.9 0.6320 1.5 5.7 HT1900.1-2455
262.8379 -33.9419 3.6 16.1 -77.0 0.6009 3.2 9.9 GX 354-0
236.2977 18.0352 1.9 47.4 158.1 3.3628 6.3 ------ UNKNOWN
257.8501 28.2787 4.0 58.2 -177.3 3.5400 2.9 ------ UNKNOWN
255.7377 -48.8419 2.4 21.8 -29.9 0.8357 4.9 ------ UNKNOWN
312.6332 -69.5492 2.6 55.5 -33.7 4.5388 4.4 ------ UNKNOWN
Plot creation:
Thu Nov 12 16:41:49 EST 2015