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
263.6257 -64.7521 0.0113 40.9180 -90.1716 3.8373236 17.033 TRIG_00735188
Foreground time interval of the image:
-0.936 8.280 (delta_t = 9.216 [sec])
Background time interval of the image:
-239.800 -0.936 (delta_t = 238.864 [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 -0.760 sec. to 10.888 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43319 ( -0.135425 0.135135 )
Norm@50keV : 2.63951E-02 ( -0.00218212 0.00217823 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.71 using 59 PHA bins.
# Reduced chi-squared = 0.9949 for 57 degrees of freedom
# Null hypothesis probability = 4.859721e-01
Photon flux (15-150 keV) in 11.65 sec: 3.23955 ( -0.27614 0.27655 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.9522e-06 ( -2.62243e-07 2.63648e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.760 sec. to 10.888 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08282 ( -0.568279 0.428223 )
Epeak [keV] : 134.327 ( -55.0501 -134.329 )
Norm@50keV : 3.95967E-02 ( -0.0145934 0.0356727 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.31 using 59 PHA bins.
# Reduced chi-squared = 0.9878 for 56 degrees of freedom
# Null hypothesis probability = 5.007573e-01
Photon flux (15-150 keV) in 11.65 sec: 3.20703 ( -0.28041 0.28058 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.89691e-06 ( -2.80141e-07 2.77227e-07 ) ergs/cm2
Band function
Time interval is from -0.760 sec. to 10.888 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 15.2227 (-1.58786 1.8655)
R^2/D10^2 : 0.358360 (-0.120506 0.172209)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.35 using 59 PHA bins.
# Reduced chi-squared = 1.567 for 57 degrees of freedom
# Null hypothesis probability = 3.982188e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.020e-07 3.146e-08
25- 50 8.137e-07 9.506e-08
50-150 1.292e-06 1.978e-07
15-150 2.307e-06 2.272e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-36.8366 -200)
Norm : 13.4729 (-1.10674 1.10674)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.59 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 57 degrees of freedom
# Null hypothesis probability = 4.533939e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.909e-07 4.305e-08
25- 50 7.519e-07 9.792e-08
50-150 1.649e-06 5.216e-07
15-150 2.792e-06 6.908e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.98328 (-1.68753 1.89051)
R1^2/D10^2 : 1.61265 (-0.71271 1.46626)
kT2 [keV] : 37.0688 (-10.5242 32.9882)
R2^2/D10^2 : 1.25930E-02 (-0.0103549 0.0161052)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.48 using 59 PHA bins.
# Reduced chi-squared = 0.9178 for 55 degrees of freedom
# Null hypothesis probability = 6.477959e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.223e-07 9.268e-08
25- 50 8.079e-07 2.074e-07
50-150 1.823e-06 8.313e-07
15-150 2.953e-06 9.542e-07
Peak spectrum fit
Power-law model
Time interval is from 0.308 sec. to 1.308 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59158 ( -0.240938 0.250498 )
Norm@50keV : 5.21527E-02 ( -0.00876028 0.00865927 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.64 using 59 PHA bins.
# Reduced chi-squared = 1.152 for 57 degrees of freedom
# Null hypothesis probability = 2.023998e-01
Photon flux (15-150 keV) in 1 sec: 6.68473 ( -1.0822 1.08267 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.88315e-07 ( -8.65519e-08 8.69792e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.308 sec. to 1.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13972 ( -1.13119 0.664531 )
Epeak [keV] : 92.9458 ( )
Norm@50keV : 9.10587E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.93 using 59 PHA bins.
# Reduced chi-squared = 1.159 for 56 degrees of freedom
# Null hypothesis probability = 1.934833e-01
Photon flux (15-150 keV) in 1 sec: 6.68835 ( -1.08124 1.08201 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.81194e-07 ( -9.17366e-08 8.95745e-08 ) ergs/cm2
Band function
Time interval is from 0.308 sec. to 1.308 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 12.1226 (-2.20776 2.92582)
R^2/D10^2 : 1.68054 (-0.907145 1.74556)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.20 using 59 PHA bins.
# Reduced chi-squared = 1.302 for 57 degrees of freedom
# Null hypothesis probability = 6.253114e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.228e-08 1.547e-08
25- 50 1.665e-07 4.220e-08
50-150 1.481e-07 5.670e-08
15-150 3.669e-07 8.375e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 179.581 (-86.1632 -176.866)
Norm : 27.7118 (-4.58811 5.46108)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.92 using 59 PHA bins.
# Reduced chi-squared = 1.139 for 57 degrees of freedom
# Null hypothesis probability = 2.202272e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.926e-08 3.934e-08
25- 50 1.324e-07 7.275e-08
50-150 2.849e-07 1.584e-07
15-150 4.865e-07 2.704e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.65951 (-2.21766 2.68722)
R1^2/D10^2 : 4.45431 (-2.58187 7.18345)
kT2 [keV] : 39.5110 (-17.2287 -39.4825)
R2^2/D10^2 : 1.73808E-02 (-0.0165307 0.112817)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.23 using 59 PHA bins.
# Reduced chi-squared = 1.113 for 55 degrees of freedom
# Null hypothesis probability = 2.624684e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.719e-08 3.607e-08
25- 50 1.513e-07 8.090e-08
50-150 2.691e-07 1.450e-07
15-150 4.875e-07 2.321e-07
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: 1.43319 ( -0.135425 0.135135 )
Norm@50keV : 2.63951E-02 ( -0.00218212 0.00217823 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.71 using 59 PHA bins.
# Reduced chi-squared = 0.9949 for 57 degrees of freedom
# Null hypothesis probability = 4.859721e-01
Photon flux (15-150 keV) in 11.65 sec: 3.23948 ( -0.276124 0.276538 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.95187e-06 ( -2.62636e-07 2.63627e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08280 ( -0.568274 0.428251 )
Epeak [keV] : 134.320 ( -55.0486 -134.329 )
Norm@50keV : 3.95977E-02 ( -0.0145934 0.0356727 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.31 using 59 PHA bins.
# Reduced chi-squared = 0.9878 for 56 degrees of freedom
# Null hypothesis probability = 5.007573e-01
Photon flux (15-150 keV) in 11.65 sec: 3.20668 ( -0.28033 0.28052 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.89801e-06 ( -2.80229e-07 2.77421e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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) = 7.06e-07
S(50-100 keV) = 1.05e-06
T90 vs. Hardness ratio plot
T90 = 9.53600001335144 sec.
Hardness ratio (energy fluence ratio) = 1.48725
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.76732
Count Ratio (50-100 keV) / (15-25 keV) = 1.41827
Mask shadow pattern
IMX = -2.596258691428084E-03, IMY = 8.667724756775479E-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:
-239.800000 -0.760000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.7050 -40.3865 0.0 32.5 45.2 0.2769 0.9 12.9 Vela X-1
170.3304 -60.6462 2.2 9.1 -17.1 1.0000 5.2 1.5 Cen X-3
186.6726 -62.7597 2.4 10.0 -66.6 0.8902 4.9 0.8 GX 301-2
220.9138 -19.4573 3.7 45.9 -171.5 1.1381 3.2 ------ UNKNOWN
74.2084 -53.3973 3.0 57.0 -6.8 3.3160 3.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.760000 10.888000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5184 -40.6975 5.5 32.5 44.5 -0.1210 -2.1 8.6 Vela X-1
170.6559 -60.6946 9.7 9.1 -18.1 0.0453 1.2 10.9 Cen X-3
186.9972 -62.8258 11.7 10.1 -67.3 -0.0369 -1.0 9.9 GX 301-2
160.8928 -48.5131 2.1 13.2 53.7 0.2073 5.5 ------ UNKNOWN
248.0837 -72.3930 2.7 33.6 -80.3 0.3969 4.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
71.500600 362.260000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3272 -60.6300 1653.9 39.0 85.7 -0.0040 -0.0 0.5 Cen X-3
186.5573 -62.5803 0.0 32.1 92.3 0.1066 0.4 11.7 GX 301-2
244.9654 -15.6394 1.0 50.7 -168.7 5.4224 12.1 0.8 Sco X-1
255.9901 -37.8449 0.6 27.3 -158.4 3.1115 18.5 0.2 4U 1700-377
256.5577 -36.4993 2.9 28.6 -157.1 0.6929 4.0 7.5 GX 349+2
263.0065 -24.7716 2.1 40.0 -146.1 1.5497 5.6 1.6 GX 1+4
264.8418 -44.4043 5.9 20.4 -142.7 0.2867 1.9 5.0 4U 1735-44
270.1402 -25.0661 10.4 39.9 -136.0 0.3118 1.1 7.9 GX 5-1
270.4195 -25.6584 5.3 39.4 -135.6 0.6116 2.2 8.1 GRS 1758-258
275.7323 -30.3291 4.3 35.3 -127.0 -0.6804 -2.7 10.2 H1820-303
285.0075 -25.0750 18.9 42.0 -115.7 0.3710 0.6 9.4 HT1900.1-2455
263.0636 -33.9652 21.2 30.8 -146.1 0.1025 0.5 8.7 GX 354-0
63.2028 -70.5200 3.1 44.0 25.1 1.1532 3.7 ------ UNKNOWN
241.9854 -31.9113 2.5 35.5 -177.9 0.9219 4.6 ------ UNKNOWN
241.6987 -18.3590 3.0 48.7 -173.4 1.2465 3.9 ------ UNKNOWN
259.8905 -25.0254 0.9 39.8 -150.5 3.2935 13.2 ------ UNKNOWN
Plot creation:
Mon Feb 13 10:38:14 EST 2017