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
282.0493 -37.0342 0.0084 10.7334 128.3706 2.6599322 22.881 TRIG_01405083
Foreground time interval of the image:
-45.664 17.189 (delta_t = 62.853 [sec])
Background time interval of the image:
-239.912 -45.664 (delta_t = 194.248 [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 -45.664 sec. to 40.376 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21239 ( -0.111309 0.109885 )
Norm@50keV : 2.30859E-03 ( -0.000134559 0.000134282 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.65 using 59 bins.
Reduced chi-squared = 0.765789
# Null hypothesis probability of 9.03e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 86.04 sec: 0.271465 ( -0.016908 0.017007 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.00845e-06 ( -1.24408e-07 1.24893e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -45.664 sec. to 40.376 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21568 ( -0.114936 0.110851 )
Epeak [keV] : 9999.31 ( -9999.36 -9999.36 )
Norm@50keV : 2.30082E-03 ( -0.00013367 0.00115531 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.72 using 59 bins.
Reduced chi-squared = 0.780714
# Null hypothesis probability of 8.84e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 86.04 sec: 0.271537 ( -0.018264 0.016752 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.00896e-06 ( -1.3396e-07 1.2355e-07 ) ergs/cm2
Band function
Time interval is from -45.664 sec. to 40.376 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] : 20.8551 (-1.67756 1.88199)
R^2/D10^2 : 1.05173E-02 (-0.0025795 0.00335432)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 105.96 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.86e-05 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.458e-08 9.460e-09
25- 50 3.817e-07 3.523e-08
50-150 1.237e-06 1.179e-07
15-150 1.693e-06 1.265e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-11.2362 -200)
Norm : 1.15034 (-0.0676585 0.0676585)
------------------------------------------------------------
#Fit statistic : Chi-Squared 74.16 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.30e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.465e-07 1.747e-08
25- 50 4.743e-07 3.859e-08
50-150 1.040e-06 2.583e-07
15-150 1.761e-06 2.697e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.62284 (-1.14896 1.41292)
R1^2/D10^2 : 0.291994 (-0.146107 0.313203)
kT2 [keV] : 30.5443 (-4.15591 6.23533)
R2^2/D10^2 : 2.72515E-03 (-0.00120325 0.00167151)
------------------------------------------------------------
#Fit statistic : Chi-Squared 39.51 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.43e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.004e-07 6.066e-08
25- 50 4.147e-07 7.873e-08
50-150 1.404e-06 2.465e-07
15-150 2.019e-06 3.635e-07
Peak spectrum fit
Power-law model
Time interval is from 0.344 sec. to 1.344 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.932551 ( -0.278566 0.265801 )
Norm@50keV : 9.64622E-03 ( -0.0014327 0.00140747 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 67.33 using 59 bins.
Reduced chi-squared = 1.18123
# Null hypothesis probability of 1.64e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.10773 ( -0.164356 0.16576 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06928e-07 ( -1.58277e-08 1.59092e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.344 sec. to 1.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.925716 ( -1.17751 0.454257 )
Epeak [keV] : 9989.67 ( -9982.06 -9982.06 )
Norm@50keV : 9.70699E-03 ( -0.0013522 0.0209508 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 67.33 using 59 bins.
Reduced chi-squared = 1.20232
# Null hypothesis probability of 1.43e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.10827 ( -0.175131 0.16452 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0664e-07 ( -1.63832e-08 1.60983e-08 ) ergs/cm2
Band function
Time interval is from 0.344 sec. to 1.344 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] : 26.1025 (-4.59704 6.29159)
R^2/D10^2 : 2.36473E-02 (-0.0111627 0.0191893)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 73.21 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.27e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.734e-09 9.740e-10
25- 50 1.585e-08 4.326e-09
50-150 7.948e-08 2.007e-08
15-150 9.806e-08 2.430e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-33.7727 -200)
Norm : 4.64638 (-0.683901 0.683901)
------------------------------------------------------------
#Fit statistic : Chi-Squared 83.10 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.36e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.156e-08 6.645e-09
25- 50 2.225e-08 1.235e-08
50-150 4.879e-08 2.742e-08
15-150 8.260e-08 4.705e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.00736 (-2.05854 3.67677)
R1^2/D10^2 : 7.66212 (-7.21553 86.8844)
kT2 [keV] : 29.9748 (-6.06359 10.2858)
R2^2/D10^2 : 1.49758E-02 (-0.00864206 0.0165804)
------------------------------------------------------------
#Fit statistic : Chi-Squared 64.34 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.82e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.137e-09 4.647e-09
25- 50 1.554e-08 6.455e-09
50-150 8.249e-08 3.120e-08
15-150 1.072e-07 3.712e-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: 1.17601 ( -0.114658 0.113001 )
Norm@50keV : 2.63047E-03 ( -0.000158984 0.000158478 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 41.27 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.42e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 62.85 sec: 0.307759 ( -0.0197684 0.0198918 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.68887e-06 ( -1.077e-07 1.08236e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17118 ( -0.415935 0.124807 )
Epeak [keV] : 9996.00 ( -9995.26 -9995.26 )
Norm@50keV : 2.64336E-03 ( -0.000157278 0.00158165 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 41.27 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.30e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 62.85 sec: 0.305681 ( -0.020683 0.022186 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6842e-06 ( -1.13953e-07 1.12577e-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) = 4.25e-07
S(50-100 keV) = 7.34e-07
T90 vs. Hardness ratio plot
T90 = 66.4479999542236 sec.
Hardness ratio (energy fluence ratio) = 1.72706
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.47241
Count Ratio (50-100 keV) / (15-25 keV) = 1.39534
Mask shadow pattern
IMX = -1.176658738198587E-01, IMY = -1.486139049842290E-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:
-239.912000 -45.664000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9828 -15.6429 0.4 28.4 -58.4 12.5649 26.5 0.3 Sco X-1
255.9694 -37.8464 1.0 13.9 -117.7 4.2971 11.2 0.8 4U 1700-377
256.2493 -36.4233 6.8 13.2 -112.3 0.6378 1.7 9.0 GX 349+2
262.8442 -24.8738 10.1 9.7 -45.5 0.4190 1.1 11.8 GX 1+4
264.5359 -44.2991 0.0 13.8 -156.5 -0.3248 -0.9 12.7 4U 1735-44
268.2351 -1.3939 9.8 30.2 -1.5 0.5176 1.2 8.7 SW J1753.5-0127
270.3473 -25.0204 3.4 6.4 -1.0 1.2305 3.4 4.9 GX 5-1
270.4785 -25.8832 0.0 5.6 -0.5 -0.1813 -0.5 12.7 GRS 1758-258
274.0604 -13.9645 4.6 17.7 13.9 0.8662 2.5 5.4 GX 17+2
276.1072 -30.4213 4.9 4.5 82.3 0.8596 2.3 10.0 H1820-303
284.9047 -25.0899 0.0 13.8 70.1 0.8700 2.3 12.4 HT1900.1-2455
288.7469 10.9507 16.1 45.7 28.7 0.4753 0.7 3.0 GRS 1915+105
262.9877 -33.8323 997.2 7.1 -107.9 -0.0039 -0.0 0.2 GX 354-0
250.4179 -30.1891 2.9 17.7 -87.4 1.5550 4.0 ------ UNKNOWN
211.3816 -50.0663 3.1 47.4 -127.3 6.9703 3.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-45.664000 17.188600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0356 -15.6393 2.6 28.4 -58.3 0.6801 4.4 3.2 Sco X-1
256.0414 -37.7744 8.0 13.8 -117.5 0.1645 1.4 4.9 4U 1700-377
256.5155 -36.5756 5.7 13.0 -113.3 -0.2331 -2.0 9.9 GX 349+2
263.1725 -24.8930 0.0 9.5 -44.3 0.1360 1.3 12.6 GX 1+4
264.9508 -44.6006 0.0 14.0 -158.1 -0.1269 -1.1 12.7 4U 1735-44
268.2419 -1.3941 3.3 30.2 -1.5 -0.4625 -3.4 8.3 SW J1753.5-0127
270.4378 -24.9201 0.0 6.5 -0.2 -0.1620 -1.4 12.7 GX 5-1
270.3008 -25.8934 4.5 5.6 -2.2 0.2984 2.6 9.0 GRS 1758-258
273.8737 -14.1965 0.0 17.4 13.4 0.2626 2.3 12.3 GX 17+2
275.7359 -30.2580 31.4 4.3 79.2 -0.0433 -0.4 11.8 H1820-303
284.9561 -24.9037 30.1 13.9 69.5 0.0475 0.4 4.5 HT1900.1-2455
288.9323 10.9142 6.3 45.7 29.0 0.5654 1.8 8.1 GRS 1915+105
263.1692 -33.9445 27.1 7.0 -109.1 -0.0479 -0.4 11.1 GX 354-0
302.9468 0.9428 2.7 44.4 53.2 1.9541 4.3 ------ UNKNOWN
282.0493 -37.0342 0.5 10.7 128.4 2.6601 22.9 ------ UNKNOWN
239.7117 -17.6695 2.7 31.4 -67.5 0.7511 4.3 ------ UNKNOWN
228.4903 -15.3645 2.2 41.8 -73.5 2.3414 5.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
61.988590 676.588610
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9916 -15.6472 0.6 39.1 -65.6 52.5983 19.5 0.8 Sco X-1
256.0023 -37.8178 0.8 20.7 -98.8 16.7852 14.4 1.8 4U 1700-377
256.4050 -36.4059 4.3 20.5 -94.7 3.0772 2.7 1.8 GX 349+2
262.9970 -24.8887 5.8 20.3 -57.3 2.4850 2.0 8.6 GX 1+4
264.6907 -44.3934 6.1 15.1 -123.4 1.9562 1.9 4.1 4U 1735-44
268.3670 -1.3064 25.8 37.9 -21.3 0.6654 0.4 8.8 SW J1753.5-0127
270.3508 -25.0036 5.1 15.6 -41.7 2.4536 2.3 5.8 GX 5-1
270.1223 -25.8799 0.0 15.1 -44.4 1.6569 1.6 12.7 GRS 1758-258
274.0532 -14.0525 3.0 24.1 -18.0 4.1915 3.8 2.9 GX 17+2
275.7537 -30.3356 3.8 8.5 -38.6 3.0965 3.1 9.1 H1820-303
285.1971 -24.9054 18.2 12.4 14.7 0.5907 0.6 8.8 HT1900.1-2455
288.8955 10.9962 5.0 48.4 10.3 -3.9975 -2.3 6.5 GRS 1915+105
262.9875 -33.8342 49.5 15.8 -82.7 -0.2512 -0.2 0.1 GX 354-0
306.2638 -26.6724 2.8 22.9 71.5 5.3379 4.2 ------ UNKNOWN
265.5631 -41.5004 2.4 13.5 -113.1 4.6949 4.8 ------ UNKNOWN
Plot creation:
Sun Mar 1 23:15:47 EST 2026