Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
282.2659 -11.8555 0.0126 33.2756 174.4184 0.2333453 15.411 TRIG_01315630
Foreground time interval of the image:
-0.328 0.232 (delta_t = 0.560 [sec])
Background time interval of the image:
-74.579 -0.328 (delta_t = 74.251 [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
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
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 -0.328 sec. to 0.232 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.550099 ( -0.233525 0.218246 )
Norm@50keV : 2.49533E-02 ( -0.0033762 0.00326604 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 62.11 using 59 bins.
Reduced chi-squared = 1.08965
# Null hypothesis probability of 2.99e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 0.56 sec: 0.162922 ( -0.006268 0.223274 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83108e-07 ( -2.104e-08 2.10928e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.328 sec. to 0.232 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.530727 ( -0.966565 0.229854 )
Epeak [keV] : 9899.14 ( -9744.19 -9744.19 )
Norm@50keV : 2.50859E-02 ( -0.00311991 0.0291357 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 62.11 using 59 bins.
Reduced chi-squared = 1.10911
# Null hypothesis probability of 2.68e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 0.56 sec: 2.92979 ( -0.36721 0.32443 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.98038e-07 ( -3.66064e-08 6.27609e-09 ) ergs/cm2
Band function
Time interval is from -0.328 sec. to 0.232 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] : 34.2134 (-5.92129 8.41111)
R^2/D10^2 : 3.22674E-02 (-0.0139583 0.022095)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.88 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.18e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.041e-09 7.907e-10
25- 50 1.973e-08 4.351e-09
50-150 1.531e-07 3.007e-08
15-150 1.759e-07 3.041e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 11.5047 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 120.29 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.02e-06 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.604e-08 9.052e-09
25- 50 3.086e-08 1.704e-08
50-150 6.768e-08 3.727e-08
15-150 1.146e-07 6.451e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.2822 (-4.44333 7.06265)
R1^2/D10^2 : 0.441329 (-0.340822 2.41806)
kT2 [keV] : 52.4047 (-16.1604 100.035)
R2^2/D10^2 : 9.63973E-03 (-0.00761736 0.0124281)
------------------------------------------------------------
#Fit statistic : Chi-Squared 61.01 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.69e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.261e-09 2.908e-09
25- 50 1.887e-08 4.906e-09
50-150 1.546e-07 3.270e-08
15-150 1.807e-07 3.534e-08
Peak spectrum fit
Power-law model
Time interval is from -0.540 sec. to 0.460 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.665549 ( -0.239547 0.224616 )
Norm@50keV : 1.59596E-02 ( -0.00221097 0.00214708 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.86 using 59 bins.
Reduced chi-squared = 0.944912
# Null hypothesis probability of 5.94e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.85025 ( -0.23222 0.23442 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97911e-07 ( -2.37865e-08 2.38474e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.540 sec. to 0.460 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.376117 ( -1.04548 0.485296 )
Epeak [keV] : 377.540 ( -377.538 -377.538 )
Norm@50keV : 2.03737E-02 ( -0.00580276 0.025942 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.54 using 59 bins.
Reduced chi-squared = 0.956071
# Null hypothesis probability of 5.68e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.82371 ( -0.24372 0.24693 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.96648e-07 ( -2.44849e-08 2.42593e-08 ) ergs/cm2
Band function
Time interval is from -0.540 sec. to 0.460 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] : 31.1054 (-5.20344 7.20238)
R^2/D10^2 : 2.56266E-02 (-0.0111354 0.0177914)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.43 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.87e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.793e-09 9.740e-10
25- 50 2.374e-08 5.550e-09
50-150 1.598e-07 3.560e-08
15-150 1.874e-07 3.510e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-20.1184 -200)
Norm : 7.61650 (-0.993023 0.993023)
------------------------------------------------------------
#Fit statistic : Chi-Squared 97.35 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.95e-04 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.895e-08 1.050e-08
25- 50 3.646e-08 2.023e-08
50-150 7.996e-08 4.430e-08
15-150 1.354e-07 7.405e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.0879 (-5.24347 8.05611)
R1^2/D10^2 : 0.294913 (-0.239884 3.37878)
kT2 [keV] : 44.5678 (-12.9069 67.2668)
R2^2/D10^2 : 8.49136E-03 (-0.00726482 0.0146886)
------------------------------------------------------------
#Fit statistic : Chi-Squared 52.66 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.64e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.789e-09 3.706e-09
25- 50 2.282e-08 5.920e-09
50-150 1.614e-07 3.695e-08
15-150 1.930e-07 3.590e-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: 0.550099 ( -0.233525 0.218246 )
Norm@50keV : 2.49533E-02 ( -0.0033762 0.00326604 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 62.11 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.99e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 0.56 sec: 2.93272 ( -0.343936 0.346165 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83089e-07 ( -2.10396e-08 2.11104e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.540125 ( -0.954081 0.25209 )
Epeak [keV] : 9999.99 ( -9999.99 -9999.99 )
Norm@50keV : 2.51623E-02 ( -0.00339036 0.00275402 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 62.10 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.68e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 0.56 sec: 2.93256 ( -0.36395 0.34508 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83516e-07 ( -2.18596e-08 2.07508e-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) = 2.45e-08
S(50-100 keV) = 6.66e-08
T90 vs. Hardness ratio plot
T90 = 0.46399998664856 sec.
Hardness ratio (energy fluence ratio) = 2.71837
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 2.11728
Count Ratio (50-100 keV) / (15-25 keV) = 3.16095
Mask shadow pattern
IMX = -6.531553594462511E-01, IMY = -6.383055738437568E-02
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
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:
-74.579400 -0.328000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2415 -60.6629 5.8 57.5 -19.0 1.3086 2.0 3.2 Cen X-3
186.6576 -62.7686 54.9 49.5 -19.9 0.0740 0.2 0.1 GX 301-2
244.9777 -15.6330 0.4 23.5 94.5 5.8780 26.5 0.4 Sco X-1
256.0526 -37.8136 2.5 1.7 -20.2 0.7564 4.6 3.6 4U 1700-377
256.4592 -36.5152 4.7 0.7 24.3 0.3874 2.5 5.6 GX 349+2
263.0364 -24.5398 0.0 12.8 149.8 0.3573 2.2 12.4 GX 1+4
264.4489 -44.4312 0.0 9.7 -86.3 0.3329 2.0 12.6 4U 1735-44
268.4864 -1.5320 3.5 36.4 144.7 1.0012 3.3 8.6 SW J1753.5-0127
270.2797 -25.0153 4.4 15.9 173.6 0.4002 2.6 3.8 GX 5-1
270.0705 -25.7367 0.0 15.2 174.8 -0.1569 -1.0 12.5 GRS 1758-258
274.1081 -14.0021 9.5 27.0 163.8 0.2397 1.2 6.3 GX 17+2
275.8536 -30.2219 26.7 16.7 -160.8 -0.0668 -0.4 9.5 H1820-303
284.9692 -25.0558 4.8 26.2 -162.2 0.4059 2.4 8.9 HT1900.1-2455
262.8369 -33.8763 4.7 5.2 -171.8 0.3597 2.5 8.0 GX 354-0
171.3868 -55.1473 2.6 58.7 -12.6 3.2066 4.5 ------ UNKNOWN
309.2477 -21.4196 2.5 47.3 -148.1 1.6864 4.7 ------ UNKNOWN
281.6783 -80.2959 2.3 44.9 -60.1 3.8198 5.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.328000 0.232000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3485 -60.5015 9.6 57.5 -18.8 0.0699 1.2 7.4 Cen X-3
186.6178 -62.6571 13.1 49.5 -19.7 -0.0233 -0.9 6.9 GX 301-2
245.1546 -15.6552 4.0 23.4 94.9 0.0449 2.9 10.2 Sco X-1
255.9198 -38.0314 7.6 2.0 -21.3 0.0177 1.5 11.7 4U 1700-377
256.3598 -36.5620 4.7 0.8 22.1 -0.0276 -2.5 9.1 GX 349+2
262.9816 -24.9515 0.0 12.4 150.2 0.0131 1.1 12.4 GX 1+4
264.4489 -44.4312 0.0 9.7 -86.3 0.0309 2.5 12.6 4U 1735-44
268.4388 -1.5633 6.5 36.3 144.6 -0.0393 -1.8 7.9 SW J1753.5-0127
270.0534 -25.0727 0.0 15.7 173.1 0.0156 1.3 12.5 GX 5-1
270.2841 -25.9216 128.2 15.2 175.8 0.0011 0.1 10.8 GRS 1758-258
274.1108 -14.1269 4.9 26.9 163.9 0.0344 2.4 8.2 GX 17+2
276.0581 -30.4558 8.0 16.7 -159.8 0.0166 1.4 8.7 H1820-303
285.1332 -24.8011 6.2 26.5 -162.5 0.0250 1.9 8.9 HT1900.1-2455
263.0334 -33.6489 30.5 5.4 -173.0 -0.0043 -0.4 11.4 GX 354-0
271.1998 -17.2136 2.3 22.8 161.9 0.0639 5.0 ------ UNKNOWN
282.2659 -11.8555 0.8 33.3 174.4 0.2333 15.4 ------ UNKNOWN
184.1868 -50.7988 2.5 52.6 -4.9 0.1517 4.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
125.020590 962.592900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9723 -15.6409 0.8 36.4 96.5 11.2868 15.1 0.4 Sco X-1
254.4388 35.2010 4.6 53.9 168.7 2.8116 2.5 8.5 Her X-1
255.9906 -37.8331 1.4 35.0 54.4 5.0161 8.3 0.7 4U 1700-377
256.3356 -36.3727 25.8 33.9 56.0 0.2417 0.4 5.7 GX 349+2
263.0387 -24.6536 4.2 22.3 69.0 0.9615 2.8 5.8 GX 1+4
264.5997 -44.4247 5.1 35.9 38.5 1.1833 2.3 6.3 4U 1735-44
268.3413 -1.4531 41.0 17.3 142.8 -0.0750 -0.3 1.6 SW J1753.5-0127
270.3317 -25.0068 6.9 17.3 55.8 0.5093 1.7 5.0 GX 5-1
270.2888 -25.5973 8.6 17.8 54.6 -0.4107 -1.3 8.8 GRS 1758-258
274.0991 -13.9372 5.5 8.2 91.2 0.6000 2.1 8.1 GX 17+2
276.0405 -30.1926 0.0 19.2 33.4 -0.2628 -0.9 12.1 H1820-303
285.0529 -25.0729 7.9 13.5 5.9 0.4400 1.5 9.2 HT1900.1-2455
288.9278 11.0100 3.2 23.8 -146.8 1.0487 3.6 8.5 GRS 1915+105
299.5732 35.2113 2.2 49.8 -144.6 4.4618 5.2 1.0 Cyg X-1
262.9138 -33.7011 13.6 28.1 52.7 0.3354 0.9 8.9 GX 354-0
312.0136 -52.2698 2.6 47.0 -7.7 2.0662 4.4 ------ UNKNOWN
306.4032 33.6954 2.8 51.0 -137.2 6.0933 4.1 ------ UNKNOWN
328.3666 -17.5058 2.9 44.9 -60.2 6.2765 4.0 ------ UNKNOWN
310.3732 27.7579 3.2 48.1 -129.1 5.4693 3.7 ------ UNKNOWN
Plot creation:
Fri Jun 20 15:40:17 EDT 2025