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
295.0996 21.0547 0.0147 44.2947 21.9336 1.0379033 12.986 TRIG_01297508
Foreground time interval of the image:
-0.136 7.352 (delta_t = 7.488 [sec])
Background time interval of the image:
-239.176 -0.136 (delta_t = 239.040 [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 -0.136 sec. to 7.352 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60779 ( -0.186296 0.189312 )
Norm@50keV : 9.58040E-03 ( -0.00113915 0.00113402 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 54.55 using 59 bins.
Reduced chi-squared = 0.957018
# Null hypothesis probability of 5.68e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 7.488 sec: 1.23415 ( -0.14856 0.14895 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.70372e-07 ( -8.3632e-08 8.407e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.136 sec. to 7.352 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.782352 ( -0.937201 0.767975 )
Epeak [keV] : 74.4403 ( -18.496 228.587 )
Norm@50keV : 2.50615E-02 ( -0.0146082 0.0482185 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.15 using 59 bins.
Reduced chi-squared = 0.913393
# Null hypothesis probability of 6.59e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 7.488 sec: 1.20274 ( -0.1516 0.1519 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.4492e-07 ( -8.82266e-08 8.82858e-08 ) ergs/cm2
Band function
Time interval is from -0.136 sec. to 7.352 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] : 14.3727 (-1.82699 2.12306)
R^2/D10^2 : 0.166030 (-0.0659681 0.105983)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 63.24 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.66e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.410e-08 1.233e-08
25- 50 2.065e-07 3.699e-08
50-150 2.845e-07 6.118e-08
15-150 5.451e-07 9.188e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 165.074 (-62.5876 -165.04)
Norm : 5.12830 (-0.651049 0.75968)
------------------------------------------------------------
#Fit statistic : Chi-Squared 52.15 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.57e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.776e-08 5.141e-08
25- 50 1.836e-07 9.822e-08
50-150 3.766e-07 2.062e-07
15-150 6.579e-07 3.507e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.01844 (-2.98266 3.28438)
R1^2/D10^2 : 0.823685 (-0.521925 2.84134)
kT2 [keV] : 25.0688 (-7.63338 26.689)
R2^2/D10^2 : 1.54870E-02 (-0.0140473 0.0221259)
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.56 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.45e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.447e-08 4.659e-08
25- 50 1.980e-07 9.654e-08
50-150 3.680e-07 1.994e-07
15-150 6.505e-07 3.326e-07
Peak spectrum fit
Power-law model
Time interval is from -0.156 sec. to 0.844 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30782 ( -0.220971 0.21887 )
Norm@50keV : 2.64138E-02 ( -0.00365505 0.00365473 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.29 using 59 bins.
Reduced chi-squared = 1.02263
# Null hypothesis probability of 4.28e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 3.15586 ( -0.45676 0.45799 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.60549e-07 ( -3.82538e-08 3.83607e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.156 sec. to 0.844 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.693257 ( -1.11419 0.719736 )
Epeak [keV] : 116.320 ( -45.0996 -116.321 )
Norm@50keV : 5.18982E-02 ( -0.0279757 0.119115 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.97 using 59 bins.
Reduced chi-squared = 1.01732
# Null hypothesis probability of 4.39e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 3.11722 ( -0.4602 0.46152 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56372e-07 ( -3.99756e-08 3.94565e-08 ) ergs/cm2
Band function
Time interval is from -0.156 sec. to 0.844 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] : 17.4824 (-2.65772 3.30616)
R^2/D10^2 : 0.233503 (-0.106055 0.178915)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 65.13 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.15e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.442e-08 3.771e-09
25- 50 6.522e-08 1.235e-08
50-150 1.435e-07 3.551e-08
15-150 2.232e-07 4.705e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-48.1114 -200)
Norm : 13.3031 (-1.85996 1.85996)
------------------------------------------------------------
#Fit statistic : Chi-Squared 61.14 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.30e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.313e-08 1.873e-08
25- 50 6.373e-08 3.606e-08
50-150 1.398e-07 7.800e-08
15-150 2.366e-07 1.317e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 11.3061 (-4.83841 4.04945)
R1^2/D10^2 : 0.731330 (-0.4133 2.33358)
kT2 [keV] : 45.4452 (-25.2623 -47.7227)
R2^2/D10^2 : 6.56664E-03 (-0.00529518 0.0759224)
------------------------------------------------------------
#Fit statistic : Chi-Squared 55.95 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.39e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.122e-08 1.235e-08
25- 50 6.872e-08 3.788e-08
50-150 1.670e-07 8.625e-08
15-150 2.569e-07 1.275e-07
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: 1.60779 ( -0.186296 0.189312 )
Norm@50keV : 9.58040E-03 ( -0.00113915 0.00113402 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 54.55 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.68e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 7.488 sec: 1.23411 ( -0.148554 0.148936 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.70276e-07 ( -8.36222e-08 8.4079e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.782355 ( -0.937204 0.767972 )
Epeak [keV] : 74.4405 ( -18.4961 228.583 )
Norm@50keV : 2.50613E-02 ( -0.0146081 0.0482186 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.15 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.59e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 7.488 sec: 1.20261 ( -0.15157 0.15185 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.45148e-07 ( -8.82708e-08 8.83509e-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) = 1.74e-07
S(50-100 keV) = 2.29e-07
T90 vs. Hardness ratio plot
T90 = 6.20799994468689 sec.
Hardness ratio (energy fluence ratio) = 1.31609
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.76848
Count Ratio (50-100 keV) / (15-25 keV) = 1.26996
Mask shadow pattern
IMX = 9.050566007664759E-01, IMY = -3.644467887289749E-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:
-239.176000 -0.136000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.5802 35.2215 0.8 32.6 36.5 6.9919 14.4 1.3 Cyg X-1
308.0869 40.9793 4.1 24.1 41.6 1.1156 2.8 1.9 Cyg X-3
326.1578 38.5322 0.0 12.6 14.6 0.6993 2.3 12.6 Cyg X-2
67.3941 70.3636 2.5 47.4 155.9 4.5350 4.6 ------ UNKNOWN
318.6451 63.2474 3.0 22.4 102.4 1.6542 3.8 ------ UNKNOWN
336.6956 11.0807 2.4 33.8 -43.9 2.2057 4.8 ------ UNKNOWN
314.4779 -9.4121 2.5 59.1 -20.5 6.6776 4.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.136000 7.352000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.4284 35.1969 5.0 32.7 36.6 0.1118 2.3 7.9 Cyg X-1
308.1105 40.9545 569.9 24.1 41.5 0.0007 0.0 0.1 Cyg X-3
326.1084 38.3553 7.1 12.7 14.0 0.0505 1.6 3.6 Cyg X-2
295.0996 21.0547 0.9 44.3 21.9 1.0389 13.0 ------ UNKNOWN
27.0013 24.5786 2.5 42.2 -128.6 0.3255 4.6 ------ UNKNOWN
6.2280 11.8981 2.5 39.3 -92.7 0.4646 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
107.324590 377.124600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2862 35.2833 26.4 38.3 111.9 0.5266 0.4 9.1 Her X-1
268.4161 -1.3638 4.3 34.4 43.8 -1.9721 -2.7 6.1 SW J1753.5-0127
270.3358 -25.0714 5.4 52.0 19.9 2.5271 2.1 2.8 GX 5-1
270.3365 -25.8248 9.9 52.6 19.5 -1.4299 -1.2 5.2 GRS 1758-258
274.0059 -14.0365 367.4 40.7 23.5 0.0215 0.0 0.0 GX 17+2
275.8535 -30.4043 4.2 54.7 11.5 3.5736 2.7 4.3 H1820-303
284.9868 -25.0433 8.9 47.1 3.7 -0.8400 -1.3 7.8 HT1900.1-2455
288.8162 10.9397 3.9 11.7 22.8 1.1457 3.0 1.1 GRS 1915+105
299.5542 35.2081 0.6 14.7 -174.2 7.4780 18.6 1.8 Cyg X-1
308.1397 40.9284 2.9 22.8 -162.6 1.4587 3.9 2.0 Cyg X-3
326.1403 38.4499 8.6 31.9 -138.9 0.6843 1.3 7.8 Cyg X-2
247.8469 54.3391 2.3 48.6 136.4 8.0920 5.0 ------ UNKNOWN
263.5017 -18.7396 2.6 50.4 31.2 5.9245 4.5 ------ UNKNOWN
Plot creation:
Fri Jun 20 01:47:41 EDT 2025