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
269.6040 -40.3464 0.0065 10.4141 -97.6029 2.0133195 29.533 TRIG_01310284
Foreground time interval of the image:
-2.956 15.277 (delta_t = 18.233 [sec])
Background time interval of the image:
-41.523 -2.956 (delta_t = 38.567 [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 -2.956 sec. to 53.004 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26421 ( -0.0823343 0.0817157 )
Norm@50keV : 4.06890E-03 ( -0.000179185 0.000179125 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 38.67 using 59 bins.
Reduced chi-squared = 0.678421
# Null hypothesis probability of 9.70e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 55.96 sec: 0.482379 ( -0.022638 0.022697 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.27058e-06 ( -1.07826e-07 1.08216e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.956 sec. to 53.004 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15133 ( -0.333903 0.158061 )
Epeak [keV] : 413.185 ( -413.201 -413.201 )
Norm@50keV : 4.58752E-03 ( -0.000664328 0.00188842 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 38.30 using 59 bins.
Reduced chi-squared = 0.683929
# Null hypothesis probability of 9.66e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 55.96 sec: 0.479141 ( -0.024305 0.024327 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25303e-06 ( -1.19067e-07 1.18055e-07 ) ergs/cm2
Band function
Time interval is from -2.956 sec. to 53.004 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] : 18.5068 ( )
R^2/D10^2 : 2.74486E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 135.25 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.63e-08 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.044e-07 1.035e-08
25- 50 4.927e-07 3.251e-08
50-150 1.233e-06 9.177e-08
15-150 1.830e-06 9.625e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-7.94784 -200)
Norm : 2.03073 (-0.0904424 0.0904424)
------------------------------------------------------------
#Fit statistic : Chi-Squared 75.75 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.90e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.831e-07 1.441e-08
25- 50 5.445e-07 2.655e-08
50-150 1.194e-06 7.023e-08
15-150 2.022e-06 1.063e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.66308 (-1.71197 1.81129)
R1^2/D10^2 : 0.160493 (-0.0607374 0.122577)
kT2 [keV] : 40.6158 (-10.0477 27.0289)
R2^2/D10^2 : 1.71208E-03 (-0.00124974 0.00252566)
------------------------------------------------------------
#Fit statistic : Chi-Squared 41.30 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.14e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.888e-07 3.209e-08
25- 50 5.374e-07 7.180e-08
50-150 1.534e-06 5.507e-07
15-150 2.261e-06 6.200e-07
Peak spectrum fit
Power-law model
Time interval is from 7.704 sec. to 8.704 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.684446 ( -0.193924 0.183539 )
Norm@50keV : 1.38937E-02 ( -0.00162889 0.00160277 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 73.84 using 59 bins.
Reduced chi-squared = 1.29544
# Null hypothesis probability of 6.61e-02 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.60801 ( -0.1765 0.17737 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.70809e-07 ( -1.87262e-08 1.87874e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.704 sec. to 8.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.483427 ( -1.17821 0.890894 )
Epeak [keV] : 135.612 ( -36.4763 207.312 )
Norm@50keV : 3.95466E-02 ( -0.0213214 0.062299 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 68.48 using 59 bins.
Reduced chi-squared = 1.22286
# Null hypothesis probability of 1.22e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.53436 ( -0.18537 0.18597 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.64566e-07 ( -2.01052e-08 1.99058e-08 ) ergs/cm2
Band function
Time interval is from 7.704 sec. to 8.704 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] : 27.4504 (-3.52896 4.49065)
R^2/D10^2 : 3.24739E-02 (-0.0115411 0.0164572)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.81 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.19e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.036e-09 9.885e-10
25- 50 2.396e-08 4.110e-09
50-150 1.313e-07 2.150e-08
15-150 1.593e-07 2.590e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 6.27328 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 131.23 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.73e-08 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.562e-08 8.785e-09
25- 50 3.005e-08 1.669e-08
50-150 6.590e-08 3.635e-08
15-150 1.116e-07 6.140e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.11482 (-6.83916 -6.83916)
R1^2/D10^2 : 0.369021 (-0.384384 -0.384384)
kT2 [keV] : 30.1863 (-4.98904 -30.1976)
R2^2/D10^2 : 2.35087E-02 (-0.0234108 0.0159899)
------------------------------------------------------------
#Fit statistic : Chi-Squared 67.69 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.17e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
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: 0.950635 ( -0.0920668 0.0903363 )
Norm@50keV : 6.66213E-03 ( -0.000339014 0.000337485 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 42.89 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.17e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 18.23 sec: 0.765425 ( -0.0394903 0.0395985 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33706e-06 ( -6.93723e-08 6.9534e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.747580 ( -0.374169 0.292052 )
Epeak [keV] : 366.065 ( -366.07 -366.07 )
Norm@50keV : 8.13501E-03 ( -0.00189651 0.00346303 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 41.90 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.19e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 18.23 sec: 0.757399 ( -0.041693 0.041751 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32426e-06 ( -7.40138e-08 7.34414e-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) = 4.95e-07
S(50-100 keV) = 8.23e-07
T90 vs. Hardness ratio plot
T90 = 51.37600004673 sec.
Hardness ratio (energy fluence ratio) = 1.66263
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.65488
Count Ratio (50-100 keV) / (15-25 keV) = 1.34721
Mask shadow pattern
IMX = -2.431656601344392E-02, IMY = 1.821731088809568E-01
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:
-41.523400 -2.956000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.9842 -62.7767 7.1 49.3 1.0 0.3394 1.6 9.0 GX 301-2
244.9613 -15.6339 0.8 23.5 115.3 1.9429 14.3 1.1 Sco X-1
255.8782 -37.9172 10.2 1.9 2.6 0.1152 1.1 6.7 4U 1700-377
256.2314 -36.3978 9.1 0.9 55.8 0.1283 1.3 10.0 GX 349+2
262.8838 -24.8078 7.3 12.5 170.4 0.1528 1.6 7.8 GX 1+4
264.7939 -44.4532 33.4 9.9 -66.5 0.0328 0.3 2.2 4U 1735-44
268.2955 -1.3392 7.2 36.5 165.1 0.2377 1.6 8.1 SW J1753.5-0127
270.2411 -24.8902 9.4 16.0 -166.1 -0.1202 -1.2 11.6 GX 5-1
270.2236 -25.8747 3.5 15.2 -163.6 0.3186 3.3 9.0 GRS 1758-258
273.8934 -13.9545 11.6 26.9 -175.8 -0.1043 -1.0 8.2 GX 17+2
275.9302 -30.3618 26.0 16.7 -139.5 0.0447 0.4 0.4 H1820-303
284.9180 -24.8853 6.7 26.3 -141.8 -0.1839 -1.7 6.8 HT1900.1-2455
288.8359 10.9677 5.9 55.9 -175.3 -0.7418 -2.0 2.6 GRS 1915+105
262.8637 -33.8117 17.0 5.2 -151.6 0.0662 0.7 6.4 GX 354-0
275.8343 -0.1616 2.7 40.1 176.0 0.7046 4.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-2.956000 15.276580
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.6901 -62.8681 7.4 49.5 0.9 0.2627 1.6 5.9 GX 301-2
244.9586 -15.6917 6.5 23.4 115.2 -0.1612 -1.8 3.3 Sco X-1
255.9725 -37.8600 23.8 1.8 1.8 0.0344 0.5 1.2 4U 1700-377
256.4905 -36.6190 1312.5 0.7 37.1 0.0006 0.0 12.1 GX 349+2
263.1225 -24.6726 7.6 12.7 171.1 -0.1070 -1.5 7.6 GX 1+4
264.8347 -44.5522 3.3 10.0 -66.3 0.2392 3.4 7.3 4U 1735-44
268.4293 -1.5835 7.4 36.3 165.4 -0.1668 -1.6 8.7 SW J1753.5-0127
270.2930 -24.9146 5.1 16.0 -165.9 0.1614 2.3 9.9 GX 5-1
270.3474 -25.8745 6.2 15.3 -163.3 -0.1367 -1.9 8.2 GRS 1758-258
274.0602 -14.0905 5.6 26.9 -175.4 -0.1541 -2.1 4.5 GX 17+2
276.0156 -30.5644 0.0 16.6 -138.7 -0.0303 -0.4 12.7 H1820-303
284.9827 -24.8504 10.5 26.3 -141.8 0.0876 1.1 5.1 HT1900.1-2455
288.8452 10.9424 7.6 55.9 -175.3 0.4369 1.5 2.8 GRS 1915+105
263.1831 -33.8550 5.5 5.4 -149.7 0.1420 2.1 9.7 GX 354-0
269.6040 -40.3464 0.4 10.4 -97.6 2.0134 29.5 ------ UNKNOWN
299.8124 -40.5729 2.2 33.2 -103.2 0.5891 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
60.476590 860.476600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.6471 -62.6680 5.6 51.8 19.2 6.8195 2.1 6.1 GX 301-2
244.9839 -15.6287 0.8 32.7 115.8 40.4711 13.9 0.7 Sco X-1
256.0678 -37.7618 104.9 10.8 83.3 0.1509 0.1 6.3 4U 1700-377
256.2041 -36.4698 8.5 11.2 89.8 1.8623 1.4 11.5 GX 349+2
263.0257 -24.5948 3.8 16.7 142.5 3.8345 3.0 9.1 GX 1+4
264.6813 -44.5934 4.3 5.6 22.9 3.1366 2.7 9.0 4U 1735-44
268.4509 -1.5714 5.8 38.8 161.9 4.7963 2.0 8.7 SW J1753.5-0127
270.0991 -25.1350 5.7 15.2 165.4 2.4930 2.0 10.6 GX 5-1
270.1414 -25.8583 10.7 14.5 165.7 1.3328 1.1 11.1 GRS 1758-258
273.9466 -14.1767 8.7 26.5 173.2 1.6902 1.3 9.1 GX 17+2
275.9270 -30.2137 4.3 11.4 -167.4 3.0522 2.7 9.2 H1820-303
285.2093 -24.7961 0.0 20.3 -151.5 2.2200 1.8 12.0 HT1900.1-2455
288.8677 11.0253 4.2 54.4 -172.8 11.4815 2.8 6.3 GRS 1915+105
263.1430 -33.9200 3.2 8.2 123.1 4.4318 3.6 9.2 GX 354-0
257.6201 -2.4529 3.0 39.4 144.7 13.7202 3.9 ------ UNKNOWN
268.9203 5.3952 4.5 45.8 162.8 10.8043 2.6 ------ UNKNOWN
Plot creation:
Fri Jun 20 01:41:05 EDT 2025