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
236.9405 -18.5424 0.0143 28.7834 99.1988 0.8934490 13.625 TRIG_00674670
Foreground time interval of the image:
-0.100 8.988 (delta_t = 9.088 [sec])
Background time interval of the image:
-239.568 -0.100 (delta_t = 239.468 [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 4.096000
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 4.096000
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 4.096000
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 -0.100 sec. to 8.988 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51366 ( -0.245663 0.245003 )
Norm@50keV : 5.96335E-03 ( -0.000793522 0.000789932 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.06 using 59 PHA bins.
# Reduced chi-squared = 0.6853 for 57 degrees of freedom
# Null hypothesis probability = 9.666305e-01
Photon flux (15-150 keV) in 9.088 sec: 0.747248 ( -0.102904 0.103523 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.1306e-07 ( -7.36013e-08 7.43321e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.100 sec. to 8.988 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50906 ( -0.42805 0.248151 )
Epeak [keV] : 9999.31 ( -9999.36 -9999.36 )
Norm@50keV : 5.98181E-03 ( -0.00501503 0.00674233 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.07 using 59 PHA bins.
# Reduced chi-squared = 0.6977 for 56 degrees of freedom
# Null hypothesis probability = 9.583980e-01
Photon flux (15-150 keV) in 9.088 sec: 0.754351 ( -0.151221 0.137386 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.19623e-07 ( -8.14067e-08 6.66076e-08 ) ergs/cm2
Band function
Time interval is from -0.100 sec. to 8.988 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.83603 ( -4.83603 -4.83603 )
beta : -1.53730 ( -0.264863 0.255236 )
Epeak [keV] : 20.6217 ( -20.6217 9.84478 )
Norm@50keV : 1551.36 ( -202.73 3.66025e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.86 using 59 PHA bins.
# Reduced chi-squared = 0.7065 for 55 degrees of freedom
# Null hypothesis probability = 9.512120e-01
Photon flux (15-150 keV) in 9.088 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] : 15.0330 (-2.86611 3.76507)
R^2/D10^2 : 7.97726E-02 (-0.0791646 0.0906241)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.42 using 59 PHA bins.
# Reduced chi-squared = 1.042 for 57 degrees of freedom
# Null hypothesis probability = 3.875260e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.429e-08 9.765e-09
25- 50 1.365e-07 3.108e-08
50-150 2.102e-07 6.053e-08
15-150 3.810e-07 7.352e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-81.7271 -199.363)
Norm : 3.04714 (-0.399819 0.399901)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.08 using 59 PHA bins.
# Reduced chi-squared = 0.7032 for 57 degrees of freedom
# Null hypothesis probability = 9.564820e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.896e-08 3.909e-08
25- 50 1.326e-07 7.402e-08
50-150 2.909e-07 1.608e-07
15-150 4.925e-07 2.745e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.60339 (-2.2176 2.79689)
R1^2/D10^2 : 0.686283 (-0.447483 1.67603)
kT2 [keV] : 37.8594 (-14.738 -37.8674)
R2^2/D10^2 : 2.93400E-03 (-0.00283594 0.0117996)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.22 using 59 PHA bins.
# Reduced chi-squared = 0.6949 for 55 degrees of freedom
# Null hypothesis probability = 9.585381e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.774e-08 3.764e-08
25- 50 1.345e-07 6.388e-08
50-150 3.288e-07 1.761e-07
15-150 5.311e-07 2.592e-07
Peak spectrum fit
Power-law model
Time interval is from 0.328 sec. to 1.328 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54583 ( -0.607714 0.567037 )
Norm@50keV : 7.94608E-03 ( -0.00237699 0.00233403 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.40 using 59 PHA bins.
# Reduced chi-squared = 1.182 for 57 degrees of freedom
# Null hypothesis probability = 1.630972e-01
Photon flux (15-150 keV) in 1 sec: 1.00474 ( -0.306975 0.30976 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.486e-08 ( -2.35998e-08 2.43076e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.328 sec. to 1.328 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.10498 ( -1.87888 0.823312 )
Epeak [keV] : 40.5690 ( )
Norm@50keV : 3.89640E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.15 using 59 PHA bins.
# Reduced chi-squared = 1.199 for 56 degrees of freedom
# Null hypothesis probability = 1.461592e-01
Photon flux (15-150 keV) in 1 sec: 1.00939 ( -0.30834 0.30705 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.41225e-08 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.328 sec. to 1.328 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.92340 ( -4.9234 -4.9234 )
beta : -1.77448 ( -0.859387 0.70925 )
Epeak [keV] : 25.6212 ( -25.6212 10.3507 )
Norm@50keV : 725.237 ( -206.467 7.2951e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.34 using 59 PHA bins.
# Reduced chi-squared = 1.206 for 55 degrees of freedom
# Null hypothesis probability = 1.405785e-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] : 10.8103 (-3.67609 13.0461)
R^2/D10^2 : 0.344916 (-0.338176 1.37571)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.01 using 59 PHA bins.
# Reduced chi-squared = 1.281 for 57 degrees of freedom
# Null hypothesis probability = 7.500196e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.391e-09 5.260e-09
25- 50 2.320e-08 1.422e-08
50-150 1.511e-08 1.120e-08
15-150 4.670e-08 2.881e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 4.05508 (-1.1808 1.92859)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.81 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 57 degrees of freedom
# Null hypothesis probability = 1.547336e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.010e-08 6.180e-09
25- 50 1.942e-08 1.173e-08
50-150 4.260e-08 2.543e-08
15-150 7.212e-08 4.262e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.19052 (-2.50011 3.49884)
R1^2/D10^2 : 1.37451 (-1.10899 6.12369)
kT2 [keV] : 65.3040 (-42.0494 -65.0499)
R2^2/D10^2 : 1.13660E-03 (-0.00105559 0.0149171)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.63 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 55 degrees of freedom
# Null hypothesis probability = 1.755345e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.216e-08 7.355e-09
25- 50 2.016e-08 1.203e-08
50-150 5.288e-08 2.927e-08
15-150 8.520e-08 4.001e-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: 1.51366 ( -0.245663 0.245003 )
Norm@50keV : 5.96335E-03 ( -0.000793522 0.000789932 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.06 using 59 PHA bins.
# Reduced chi-squared = 0.6853 for 57 degrees of freedom
# Null hypothesis probability = 9.666305e-01
Photon flux (15-150 keV) in 9.088 sec: 0.747229 ( -0.102897 0.103515 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.1299e-07 ( -7.35869e-08 7.43426e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51176 ( -0.304391 0.245937 )
Epeak [keV] : 9999.20 ( -9999.36 -9999.36 )
Norm@50keV : 5.98009E-03 ( -0.00443699 0.0067422 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.07 using 59 PHA bins.
# Reduced chi-squared = 0.6977 for 56 degrees of freedom
# Null hypothesis probability = 9.584005e-01
Photon flux (15-150 keV) in 9.088 sec: 0.748514 ( -0.104094 0.101854 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.1186e-07 ( -7.34365e-08 7.44525e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.83603 ( -4.83603 -4.83603 )
beta : -1.53730 ( -0.264863 0.255236 )
Epeak [keV] : 20.6217 ( -20.6217 9.84478 )
Norm@50keV : 1551.36 ( -202.73 3.66025e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.86 using 59 PHA bins.
# Reduced chi-squared = 0.7065 for 55 degrees of freedom
# Null hypothesis probability = 9.512120e-01
Photon flux (15-150 keV) in 9.088 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) = 1.28e-07
S(50-100 keV) = 1.79e-07
T90 vs. Hardness ratio plot
T90 = 8.25999993085861 sec.
Hardness ratio (energy fluence ratio) = 1.39844
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.27025
Count Ratio (50-100 keV) / (15-25 keV) = 0.901224
Mask shadow pattern
IMX = -8.782326275476202E-02, IMY = -5.423115040799718E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
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:
-239.568000 -0.100000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9802 -15.6553 0.4 23.8 114.0 13.2696 32.3 0.9 Sco X-1
255.9618 -37.8429 0.7 12.4 36.2 3.7859 16.2 1.2 4U 1700-377
256.2400 -36.4584 4.3 11.3 40.6 0.6232 2.7 9.7 GX 349+2
262.8701 -24.6392 3.5 5.3 137.9 0.8510 3.3 9.9 GX 1+4
264.9022 -44.5647 3.8 15.6 -1.6 0.7820 3.1 9.7 4U 1735-44
268.2489 -1.2921 0.0 27.7 178.6 0.6395 2.3 12.0 SW J1753.5-0127
270.1298 -24.9197 0.0 5.3 -145.0 0.4106 1.6 12.7 GX 5-1
270.3586 -25.7773 8.1 4.8 -136.5 0.3629 1.4 3.7 GRS 1758-258
273.9695 -13.9452 4.2 16.6 -158.7 0.7414 2.8 5.9 GX 17+2
276.0984 -30.3965 5.7 8.6 -83.4 0.4889 2.0 9.2 H1820-303
284.9084 -24.7814 7.3 17.0 -105.3 0.4156 1.6 10.9 HT1900.1-2455
288.8143 10.9710 3.7 45.4 -153.7 1.5394 3.1 1.8 GRS 1915+105
263.1454 -34.0023 0.0 5.7 22.4 0.3236 1.3 12.7 GX 354-0
269.0673 -32.2622 3.0 4.0 -39.9 0.8470 3.8 ------ UNKNOWN
299.9739 15.8527 4.5 55.3 -145.1 4.1434 2.6 ------ UNKNOWN
300.2928 15.6489 3.9 55.4 -144.7 4.8967 3.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.100000 8.988000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9954 -15.7859 4.7 23.7 113.8 0.1257 2.5 8.8 Sco X-1
255.7687 -37.9599 0.0 12.6 36.3 0.0601 1.7 12.4 4U 1700-377
256.6490 -36.3057 0.0 11.0 40.1 0.0766 2.1 12.5 GX 349+2
263.0871 -24.9048 4.6 5.0 138.0 0.0818 2.5 10.5 GX 1+4
264.9221 -44.6064 5.6 15.7 -1.6 0.0695 2.1 12.1 4U 1735-44
268.4304 -1.3748 3.5 27.7 179.0 -0.1336 -3.3 6.0 SW J1753.5-0127
270.2974 -24.9299 19.1 5.3 -143.6 0.0207 0.6 9.0 GX 5-1
270.4657 -25.7921 7.3 4.8 -135.6 -0.0540 -1.6 9.3 GRS 1758-258
273.9743 -14.1434 659.7 16.4 -158.4 0.0006 0.0 6.7 GX 17+2
275.9941 -30.2193 7.4 8.5 -84.6 0.0532 1.6 9.6 H1820-303
285.0487 -24.7761 3.5 17.2 -105.2 -0.1096 -3.3 8.7 HT1900.1-2455
288.8047 10.9352 8.5 45.4 -153.7 -0.0767 -1.4 0.7 GRS 1915+105
262.7887 -33.9610 6.1 5.9 25.1 0.0659 1.9 12.5 GX 354-0
236.9405 -18.5424 0.9 28.8 99.2 0.8935 13.6 ------ UNKNOWN
221.3425 -77.5579 2.3 52.7 5.6 0.6881 4.9 ------ UNKNOWN
282.4116 -3.7667 2.2 29.4 -151.3 0.1988 5.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
371.132600 962.472000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.5984 35.1966 0.4 48.7 -28.1 26.3587 30.5 0.5 Cyg X-1
308.1118 40.9924 1.9 40.2 -31.5 3.4405 5.9 2.4 Cyg X-3
325.9562 38.4553 0.0 34.9 -52.8 0.6626 1.1 12.9 Cyg X-2
44.7622 66.5500 3.5 16.0 129.9 1.3904 3.3 ------ UNKNOWN
61.1975 23.4103 3.5 54.1 177.1 5.3771 3.3 ------ UNKNOWN
31.2410 11.8026 5.3 55.3 -145.1 7.5355 2.4 ------ UNKNOWN
30.9579 11.7329 4.8 55.3 -144.7 9.1539 2.9 ------ UNKNOWN
Plot creation:
Fri Mar 18 11:38:44 EDT 2016