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
271.0125 -8.2931 0.0139 18.0224 133.0387 0.5888895 13.788 TRIG_00661253
Foreground time interval of the image:
-0.984 12.164 (delta_t = 13.148 [sec])
Background time interval of the image:
-250.227 -0.984 (delta_t = 249.243 [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 1.024000
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 1.024000
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 1.024000
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 -0.984 sec. to 12.164 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.25372 ( -0.222453 0.238941 )
Norm@50keV : 2.13222E-03 ( -0.000346467 0.000339462 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.25 using 59 PHA bins.
# Reduced chi-squared = 0.9869 for 57 degrees of freedom
# Null hypothesis probability = 5.030606e-01
Photon flux (15-150 keV) in 13.15 sec: 0.363269 ( -0.0409836 0.0409962 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.65788e-07 ( -3.57522e-08 3.6788e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.984 sec. to 12.164 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36334 ( -1.28187 0.723564 )
Epeak [keV] : 27.3063 ( )
Norm@50keV : 7.39775E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.99 using 59 PHA bins.
# Reduced chi-squared = 0.9641 for 56 degrees of freedom
# Null hypothesis probability = 5.513589e-01
Photon flux (15-150 keV) in 13.15 sec: 0.351205 ( -0.042695 0.042999 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.42798e-07 ( -3.83191e-08 4.37132e-08 ) ergs/cm2
Band function
Time interval is from -0.984 sec. to 12.164 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.34301 ( 0.548511 5.32368 )
beta : -3.59408 ( 3.64474 1.48212 )
Epeak [keV] : 27.8072 ( -27.7985 10.7584 )
Norm@50keV : 7.54673E-03 ( -0.00219096 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.94 using 59 PHA bins.
# Reduced chi-squared = 0.9807 for 55 degrees of freedom
# Null hypothesis probability = 5.152343e-01
Photon flux (15-150 keV) in 13.15 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] : 8.44233 (-1.02892 1.18624)
R^2/D10^2 : 0.317724 (-0.130903 0.220577)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.41 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 57 degrees of freedom
# Null hypothesis probability = 2.333304e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.588e-08 9.915e-09
25- 50 1.072e-07 1.738e-08
50-150 3.348e-08 1.229e-08
15-150 1.965e-07 2.985e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 43.6680 (-11.1409 17.4538)
Norm : 2.21472 (-0.429091 0.575666)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.99 using 59 PHA bins.
# Reduced chi-squared = 0.9472 for 57 degrees of freedom
# Null hypothesis probability = 5.886037e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.875e-08 9.869e-09
25- 50 9.381e-08 1.282e-08
50-150 7.967e-08 2.594e-08
15-150 2.422e-07 3.912e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.33825 (-2.71565 1.98973)
R1^2/D10^2 : 1.34906 (-0.877141 27.8265)
kT2 [keV] : 14.9885 (-5.16553 13.4986)
R2^2/D10^2 : 2.03637E-02 (-0.0189897 0.0468471)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.32 using 59 PHA bins.
# Reduced chi-squared = 0.9876 for 55 degrees of freedom
# Null hypothesis probability = 5.006724e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.826e-08 3.690e-08
25- 50 9.259e-08 4.707e-08
50-150 7.880e-08 4.559e-08
15-150 2.397e-07 1.228e-07
Peak spectrum fit
Power-law model
Time interval is from 0.236 sec. to 1.236 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.04033 ( -0.317234 0.346018 )
Norm@50keV : 6.81711E-03 ( -0.00141991 0.00133567 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.48 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 57 degrees of freedom
# Null hypothesis probability = 4.207775e-01
Photon flux (15-150 keV) in 1 sec: 1.04200 ( -0.15618 0.156319 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.30225e-08 ( -1.15675e-08 1.19412e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.236 sec. to 1.236 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.36264 ( -0.723384 0 )
Epeak [keV] : 136.362 ( )
Norm@50keV : 4.52716E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.89 using 59 PHA bins.
# Reduced chi-squared = 0.9979 for 56 degrees of freedom
# Null hypothesis probability = 4.791910e-01
Photon flux (15-150 keV) in 1 sec: 1.04212 ( -0.155292 0.15565 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.25954e-08 ( -1.11239e-08 1.23784e-08 ) ergs/cm2
Band function
Time interval is from 0.236 sec. to 1.236 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.55965 ( 1.56356 1.56356 )
beta : -2.03718 ( 2.0401 0.31659 )
Epeak [keV] : 12.3886 ( -11.5993 -11.5993 )
Norm@50keV : 2.05865E-02 ( -0.0210251 0.129578 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.48 using 59 PHA bins.
# Reduced chi-squared = 1.063 for 55 degrees of freedom
# Null hypothesis probability = 3.488189e-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] : 8.25901 (-1.74249 2.3403)
R^2/D10^2 : 0.935843 (-0.579865 1.50473)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.45 using 59 PHA bins.
# Reduced chi-squared = 1.394 for 57 degrees of freedom
# Null hypothesis probability = 2.634382e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.181e-08 3.579e-09
25- 50 2.182e-08 5.935e-09
50-150 6.357e-09 3.180e-09
15-150 3.999e-08 1.073e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 70.1931 (-31.3134 86.1647)
Norm : 4.96933 (-1.22076 1.92008)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.02 using 59 PHA bins.
# Reduced chi-squared = 1.106 for 57 degrees of freedom
# Null hypothesis probability = 2.718200e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.275e-08 2.732e-09
25- 50 2.030e-08 3.820e-09
50-150 2.613e-08 1.461e-08
15-150 5.919e-08 1.585e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.35950 (-1.41987 1.78903)
R1^2/D10^2 : 4.70723 (-3.21106 13.5244)
kT2 [keV] : 34.8319 (-15.3812 123.204)
R2^2/D10^2 : 4.27888E-03 (-0.00379959 0.0153223)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.68 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 55 degrees of freedom
# Null hypothesis probability = 4.123000e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.573e-08 8.241e-09
25- 50 1.639e-08 7.346e-09
50-150 3.899e-08 2.301e-08
15-150 7.111e-08 3.184e-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: 2.25372 ( -0.222453 0.238941 )
Norm@50keV : 2.13222E-03 ( -0.000346467 0.000339462 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.25 using 59 PHA bins.
# Reduced chi-squared = 0.9869 for 57 degrees of freedom
# Null hypothesis probability = 5.030606e-01
Photon flux (15-150 keV) in 13.15 sec: 0.363269 ( -0.0409836 0.0409962 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.65788e-07 ( -3.57522e-08 3.6788e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36334 ( -1.28187 0.723564 )
Epeak [keV] : 27.3063 ( )
Norm@50keV : 7.39775E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.99 using 59 PHA bins.
# Reduced chi-squared = 0.9641 for 56 degrees of freedom
# Null hypothesis probability = 5.513589e-01
Photon flux (15-150 keV) in 13.15 sec: 0.351205 ( -0.042695 0.042999 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.42798e-07 ( -3.83191e-08 4.37132e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.34301 ( 0.548511 5.32364 )
beta : -3.59408 ( 3.64474 1.48212 )
Epeak [keV] : 27.8072 ( -27.7985 10.7584 )
Norm@50keV : 7.54673E-03 ( -0.00219096 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.94 using 59 PHA bins.
# Reduced chi-squared = 0.9807 for 55 degrees of freedom
# Null hypothesis probability = 5.152343e-01
Photon flux (15-150 keV) in 13.15 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) = 8.51e-08
S(50-100 keV) = 7.14e-08
T90 vs. Hardness ratio plot
T90 = 10.7599999308586 sec.
Hardness ratio (energy fluence ratio) = 0.839013
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.03605
Count Ratio (50-100 keV) / (15-25 keV) = 0.384509
Mask shadow pattern
IMX = -2.220497500751255E-01, IMY = -2.377966004227701E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-250.227400 -0.984000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9836 -15.6358 0.4 18.5 -133.1 11.0989 31.5 0.4 Sco X-1
254.3811 35.3450 18.1 35.3 14.3 0.2845 0.6 3.7 Her X-1
255.9868 -37.8209 1.6 37.9 -166.2 2.8908 7.4 1.4 4U 1700-377
256.5457 -36.4317 2.4 36.5 -167.0 1.7747 4.8 5.4 GX 349+2
263.1716 -24.8571 7.7 26.1 178.0 0.5462 1.5 11.1 GX 1+4
264.6408 -44.5545 29.8 45.4 -174.5 -0.2530 -0.4 7.6 4U 1735-44
268.3521 -1.4794 7.9 13.5 111.6 0.4829 1.5 1.9 SW J1753.5-0127
270.3206 -25.0495 2.8 29.1 165.6 1.5532 4.1 2.7 GX 5-1
270.2116 -25.8267 6.8 29.7 166.7 0.6407 1.7 7.0 GRS 1758-258
274.1051 -13.8469 0.0 23.5 142.1 1.2588 3.4 12.8 GX 17+2
275.8865 -30.5437 6.2 36.5 164.0 0.9773 1.9 10.8 H1820-303
285.1305 -24.7506 8.6 38.3 147.7 -0.8509 -1.3 11.4 HT1900.1-2455
288.8002 10.9400 750.8 35.3 86.0 0.0121 0.0 0.3 GRS 1915+105
263.0964 -33.7618 5.9 34.6 -176.8 0.7639 2.0 6.9 GX 354-0
281.4067 -38.5847 2.6 45.6 166.0 3.4907 4.4 ------ UNKNOWN
264.5482 -9.1463 2.7 13.2 149.3 1.2805 4.3 ------ UNKNOWN
219.2044 29.4217 4.1 45.0 -30.9 1.8317 2.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.984000 12.164000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8706 -15.8122 0.0 18.7 -133.1 0.0861 2.2 12.1 Sco X-1
254.5506 35.5081 5.4 35.5 14.6 -0.1185 -2.1 10.9 Her X-1
255.7753 -37.7294 0.0 37.8 -165.9 -0.0244 -0.5 12.2 4U 1700-377
256.2417 -36.3439 12.2 36.4 -166.6 0.0470 0.9 10.5 GX 349+2
262.9793 -24.5969 5.4 25.8 178.2 0.0862 2.1 9.1 GX 1+4
264.6885 -44.4118 10.1 45.3 -174.6 0.0812 1.1 3.3 4U 1735-44
268.3379 -1.5679 6.3 13.5 112.0 -0.0725 -1.8 7.1 SW J1753.5-0127
270.1761 -25.2137 53.0 29.2 166.1 -0.0103 -0.2 10.0 GX 5-1
270.4721 -25.7951 65.8 29.8 166.2 -0.0083 -0.2 9.7 GRS 1758-258
274.1051 -13.8469 0.0 23.5 142.1 -0.0686 -1.5 12.8 GX 17+2
275.8081 -30.3943 3.7 36.3 163.9 0.1698 3.1 6.3 H1820-303
285.0672 -24.8918 62.2 38.3 148.0 0.0131 0.2 2.4 HT1900.1-2455
288.8741 10.8353 22.0 35.4 86.2 -0.0525 -0.5 8.0 GRS 1915+105
263.0303 -33.8395 5.9 34.7 -176.7 -0.0911 -1.9 2.1 GX 354-0
283.5989 31.3347 2.1 41.4 53.4 0.6702 5.5 ------ UNKNOWN
271.0125 -8.2931 0.8 18.0 133.0 0.5888 13.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
58.772590 962.959600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9865 -15.6358 0.3 26.5 -99.8 39.8850 43.2 0.5 Sco X-1
254.3218 35.3718 8.7 46.4 -10.1 1.6773 1.3 6.9 Her X-1
256.0040 -37.8328 1.7 32.5 -148.9 5.1757 7.0 1.1 4U 1700-377
256.4441 -36.4198 1.2 31.1 -148.2 6.7184 9.3 0.5 GX 349+2
263.0923 -24.8607 30.6 18.2 -147.7 0.2665 0.4 8.3 GX 1+4
264.8215 -44.4985 3.9 36.6 -163.8 2.3502 3.0 4.4 4U 1735-44
268.3707 -1.4009 14.2 7.4 -12.1 0.5171 0.8 3.1 SW J1753.5-0127
270.2456 -25.0874 1.6 16.8 -168.9 4.5963 7.2 2.2 GX 5-1
270.2311 -25.7694 2.3 17.5 -168.9 3.2066 5.0 4.2 GRS 1758-258
273.9864 -14.0243 1.7 6.4 161.9 4.4165 6.8 1.3 GX 17+2
275.8007 -30.3557 2.9 22.5 177.9 2.7838 4.0 6.5 H1820-303
285.0648 -24.9896 7.4 21.4 151.6 -1.1561 -1.6 4.4 HT1900.1-2455
288.8141 10.9691 2.4 26.2 51.6 4.4522 4.9 1.7 GRS 1915+105
263.1042 -33.8572 4.9 26.6 -156.4 1.7867 2.4 5.9 GX 354-0
297.4870 35.0651 3.7 50.1 37.2 11.5084 3.1 ------ UNKNOWN
289.0975 -63.4700 4.2 56.7 179.2 14.4543 2.7 ------ UNKNOWN
266.1210 -0.2751 2.5 9.4 -22.6 2.6133 4.5 ------ UNKNOWN
260.3800 -33.5172 2.5 27.0 -151.5 3.0597 4.5 ------ UNKNOWN
244.8563 41.8386 2.9 55.6 -14.7 10.2328 4.0 ------ UNKNOWN
230.5263 -39.9536 2.6 47.9 -129.2 13.7677 4.4 ------ UNKNOWN
229.7104 -17.3933 4.1 41.2 -98.2 10.7274 2.8 ------ UNKNOWN
Plot creation:
Mon Nov 16 15:46:31 EST 2015