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
284.2923 6.3169 0.0198 29.9372 25.9351 0.1699870 9.746 TRIG_00743086
Foreground time interval of the image:
-0.500 0.644 (delta_t = 1.144 [sec])
Background time interval of the image:
-239.328 -0.500 (delta_t = 238.828 [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 0.512000
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 0.512000
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 0.512000
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 -0.500 sec. to 0.644 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.772853 ( -0.349206 0.321574 )
Norm@50keV : 9.82661E-03 ( -0.00188396 0.0018102 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.15 using 59 PHA bins.
# Reduced chi-squared = 0.8974 for 57 degrees of freedom
# Null hypothesis probability = 6.931728e-01
Photon flux (15-150 keV) in 1.144 sec: 1.13064 ( -0.203431 0.20488 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32906e-07 ( -2.35722e-08 2.36266e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.500 sec. to 0.644 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.773466 ( -0.359579 0.31731 )
Epeak [keV] : 9999.33 ( -9999.36 -9999.36 )
Norm@50keV : 9.90778E-03 ( -0.00174531 0.0177629 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.16 using 59 PHA bins.
# Reduced chi-squared = 0.9135 for 56 degrees of freedom
# Null hypothesis probability = 6.583249e-01
Photon flux (15-150 keV) in 1.144 sec: 1.13282 ( -0.2082 0.20058 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.03294e-08 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.500 sec. to 0.644 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] : 30.2949 (-6.52368 10.4244)
R^2/D10^2 : 1.64552E-02 (-0.00918443 0.0171587)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.72 using 59 PHA bins.
# Reduced chi-squared = 0.9775 for 57 degrees of freedom
# Null hypothesis probability = 5.233705e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.687e-09 1.183e-09
25- 50 1.664e-08 5.275e-09
50-150 1.075e-07 3.616e-08
15-150 1.268e-07 4.112e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-40.3814 -200)
Norm : 4.59465 (-0.848516 0.848516)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.90 using 59 PHA bins.
# Reduced chi-squared = 1.191 for 57 degrees of freedom
# Null hypothesis probability = 1.530261e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.309e-08 7.653e-09
25- 50 2.517e-08 1.432e-08
50-150 5.521e-08 3.178e-08
15-150 9.348e-08 5.376e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.27752 (-2.32667 4.04323)
R1^2/D10^2 : 5.62578 (-5.29628 517.961)
kT2 [keV] : 35.5834 (-8.87173 18.7939)
R2^2/D10^2 : 9.99797E-03 (-0.00667349 0.0128258)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.25 using 59 PHA bins.
# Reduced chi-squared = 0.8772 for 55 degrees of freedom
# Null hypothesis probability = 7.283510e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.005e-08 6.138e-09
25- 50 1.683e-08 7.137e-09
50-150 1.095e-07 5.403e-08
15-150 1.363e-07 6.151e-08
Peak spectrum fit
Power-law model
Time interval is from -0.364 sec. to 0.636 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.878173 ( -0.372809 0.345318 )
Norm@50keV : 9.90319E-03 ( -0.00196394 0.00191268 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.95 using 59 PHA bins.
# Reduced chi-squared = 0.8587 for 57 degrees of freedom
# Null hypothesis probability = 7.672239e-01
Photon flux (15-150 keV) in 1 sec: 1.13656 ( -0.220728 0.22183 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12106e-07 ( -2.22473e-08 2.23468e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.364 sec. to 0.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.802397 ( )
Epeak [keV] : 989.203 ( )
Norm@50keV : 1.06322E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.03 using 59 PHA bins.
# Reduced chi-squared = 0.8756 for 56 degrees of freedom
# Null hypothesis probability = 7.336663e-01
Photon flux (15-150 keV) in 1 sec: 1.14439 ( -0.257828 0.2395 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12336e-07 ( -2.49363e-08 2.45913e-08 ) ergs/cm2
Band function
Time interval is from -0.364 sec. to 0.636 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] : 27.9911 (-6.55163 10.566)
R^2/D10^2 : 2.00908E-02 (-0.0119963 0.0246788)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.42 using 59 PHA bins.
# Reduced chi-squared = 0.9547 for 57 degrees of freedom
# Null hypothesis probability = 5.725845e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.567e-09 1.118e-09
25- 50 1.537e-08 6.417e-09
50-150 8.713e-08 3.451e-08
15-150 1.051e-07 3.894e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-50.2518 -200)
Norm : 4.61017 (-0.914276 0.914276)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.81 using 59 PHA bins.
# Reduced chi-squared = 1.049 for 57 degrees of freedom
# Null hypothesis probability = 3.740775e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.148e-08 6.715e-09
25- 50 2.208e-08 1.283e-08
50-150 4.843e-08 2.762e-08
15-150 8.199e-08 4.849e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.21744 (-2.49341 4.56845)
R1^2/D10^2 : 2.59030 (-2.38058 54.5228)
kT2 [keV] : 35.6047 (-10.205 27.6179)
R2^2/D10^2 : 9.37519E-03 (-0.00722401 0.0168881)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.99 using 59 PHA bins.
# Reduced chi-squared = 0.8544 for 55 degrees of freedom
# Null hypothesis probability = 7.702651e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.110e-09 5.575e-09
25- 50 1.633e-08 8.690e-09
50-150 9.010e-08 5.115e-08
15-150 1.155e-07 6.125e-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: 0.772853 ( -0.349206 0.321574 )
Norm@50keV : 9.82661E-03 ( -0.00188396 0.0018102 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.15 using 59 PHA bins.
# Reduced chi-squared = 0.8974 for 57 degrees of freedom
# Null hypothesis probability = 6.931728e-01
Photon flux (15-150 keV) in 1.144 sec: 1.13063 ( -0.203403 0.204899 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32892e-07 ( -2.3568e-08 2.36384e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.776181 ( -0.361501 0.315694 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 9.91479E-03 ( -0.00174706 0.0178168 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.16 using 59 PHA bins.
# Reduced chi-squared = 0.9136 for 56 degrees of freedom
# Null hypothesis probability = 6.582757e-01
Photon flux (15-150 keV) in 1.144 sec: 1.13249 ( -0.207909 0.20209 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32739e-07 ( -2.33898e-08 2.38009e-08 ) 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) = 2.10e-08
S(50-100 keV) = 4.92e-08
T90 vs. Hardness ratio plot
T90 = 1.07199990749359 sec.
Hardness ratio (energy fluence ratio) = 2.34286
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.4809
Count Ratio (50-100 keV) / (15-25 keV) = 2.20026
Mask shadow pattern
IMX = 5.178916333020426E-01, IMY = -2.518671730167600E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
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:
-239.328000 -0.500000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
268.2842 -1.3754 4.9 46.6 36.1 1.8653 2.4 6.8 SW J1753.5-0127
273.9583 -13.9921 4.2 52.3 19.6 2.6440 2.7 3.8 GX 17+2
284.9856 -24.7979 5.3 56.8 2.0 -2.8634 -2.2 7.9 HT1900.1-2455
288.8017 10.9015 1.3 23.6 24.8 2.1573 8.9 2.6 GRS 1915+105
299.5642 35.2070 0.4 8.5 123.8 6.3921 26.2 1.3 Cyg X-1
308.0048 41.1453 0.0 12.9 167.5 0.5488 2.4 12.5 Cyg X-3
326.0513 38.3880 5.2 19.7 -146.2 0.5192 2.2 6.9 Cyg X-2
278.8041 -16.2873 2.2 51.7 13.0 4.0443 5.3 ------ UNKNOWN
294.2095 -5.2822 2.2 35.5 -0.6 1.6114 5.3 ------ UNKNOWN
325.1451 -18.5324 3.5 50.6 -44.7 4.2051 3.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.500000 0.644000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
268.3690 -1.4524 19.0 46.6 36.0 -0.0278 -0.6 0.1 SW J1753.5-0127
273.9108 -13.9525 249.5 52.3 19.6 -0.0031 -0.0 7.5 GX 17+2
284.9594 -24.9132 10.9 56.9 2.0 0.0944 1.0 4.2 HT1900.1-2455
288.8055 11.0977 11.0 23.4 25.1 0.0163 1.0 9.1 GRS 1915+105
299.7081 35.0235 636.5 8.3 123.7 -0.0003 -0.0 12.2 Cyg X-1
308.3658 41.0370 0.0 12.8 168.8 0.0150 1.0 12.6 Cyg X-3
325.9330 38.2688 40.4 19.5 -146.0 -0.0039 -0.3 11.7 Cyg X-2
284.2923 6.3168 1.2 29.9 25.9 0.1699 9.7 ------ UNKNOWN
304.4703 16.7388 2.8 11.7 -15.0 0.0535 4.2 ------ UNKNOWN
293.7264 -28.9071 2.4 58.4 -8.3 0.4338 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
62.572600 962.744600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5485 35.3431 4.7 39.9 138.6 3.2982 2.4 4.4 Her X-1
256.1273 -38.0342 0.0 51.5 26.1 1.7209 0.7 13.2 4U 1700-377
256.4914 -36.3739 72.8 50.0 27.1 -0.3419 -0.2 4.0 GX 349+2
262.9816 -24.6664 5.4 37.2 30.8 1.8143 2.1 5.0 GX 1+4
264.8750 -44.4089 15.1 53.6 14.8 1.7463 0.8 6.2 4U 1735-44
268.2208 -1.3050 8.5 17.7 63.0 -0.7991 -1.3 12.5 SW J1753.5-0127
270.3550 -24.9649 24.1 34.0 20.6 -0.3426 -0.5 7.9 GX 5-1
270.3196 -25.7280 3.5 34.7 20.1 2.4280 3.3 1.3 GRS 1758-258
273.9256 -13.9737 4.3 22.7 24.6 1.5349 2.7 6.0 GX 17+2
275.8769 -30.2124 6.0 37.3 9.7 1.4621 1.9 9.6 H1820-303
285.1693 -25.0740 0.0 31.3 -3.8 -0.5060 -0.8 11.7 HT1900.1-2455
288.7862 10.9145 0.9 6.4 -139.1 5.8512 12.3 2.0 GRS 1915+105
299.5869 35.1942 0.5 32.2 -158.5 15.8535 24.8 0.5 Cyg X-1
308.1639 41.0909 7.5 40.8 -154.5 -1.4732 -1.5 8.6 Cyg X-3
326.2073 38.3708 17.3 49.6 -138.9 1.7582 0.7 3.4 Cyg X-2
262.8552 -33.9554 12.1 45.0 23.0 -1.1084 -1.0 9.8 GX 354-0
251.5019 -25.0290 2.5 44.7 41.9 7.3514 4.6 ------ UNKNOWN
259.8983 -25.0263 0.8 39.3 33.9 14.1991 14.3 ------ UNKNOWN
282.3701 55.1292 3.1 48.9 176.2 5.0347 3.7 ------ UNKNOWN
306.2214 57.2935 4.0 53.9 -167.9 5.7814 2.9 ------ UNKNOWN
324.2290 10.3690 4.3 39.7 -101.0 6.7780 2.7 ------ UNKNOWN
UNKNOWN
UNKNOWN
Plot creation:
Thu Apr 13 21:15:16 EDT 2017