Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
233.3948 -18.1009 0.0068 22.0 135.4 1.6249 28.1 TRIG_01308754
------------------------------------------
Foreground time interval of the image:
0.096 11.860 (delta_t = 11.764 [sec])
Background time interval of the image:
-60.808 0.096 (delta_t = 60.904 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.096 sec. to 11.860 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65526 ( -0.105068 0.106015 )
Norm@50keV : 8.16980E-03 ( -0.000481979 0.000480032 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.52 using 59 PHA bins.
# Reduced chi-squared = 0.9565 for 57 degrees of freedom
# Null hypothesis probability = 5.685744e-01
Photon flux (15-150 keV) in 11.76 sec: 1.06863 ( -0.0638186 0.0639905 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.93085e-07 ( -5.56219e-08 5.59133e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.096 sec. to 11.860 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43359 ( -0.437783 0.276263 )
Epeak [keV] : 127.131 ( )
Norm@50keV : 1.05665E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.65 using 59 PHA bins.
# Reduced chi-squared = 0.9581 for 56 degrees of freedom
# Null hypothesis probability = 5.642744e-01
Photon flux (15-150 keV) in 11.76 sec: 1.05454 ( -0.068449 0.06855 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.77312e-07 ( -6.3357e-08 6.28537e-08 ) ergs/cm2
Band function
Time interval is from 0.096 sec. to 11.860 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.820017 ( 0.96643 5.54248 )
beta : -1.76985 ( -0.266352 0.166887 )
Epeak [keV] : 51.4186 ( -50.7097 -50.7097 )
Norm@50keV : 2.60648E-02 ( -0.0276865 922088 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.70 using 59 PHA bins.
# Reduced chi-squared = 0.9582 for 55 degrees of freedom
# Null hypothesis probability = 5.629813e-01
Photon flux (15-150 keV) in 11.76 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.75312e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.6014 ( )
R^2/D10^2 : 0.161336 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 123.31 using 59 PHA bins.
# Reduced chi-squared = 2.1633 for 57 degrees of freedom
# Null hypothesis probability = 8.641495e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.431e-08 8.679e-09
25- 50 2.684e-07 2.017e-08
50-150 3.220e-07 4.157e-08
15-150 6.648e-07 4.592e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 155.986 (-38.5757 -155.799)
Norm : 4.36548 (-0.292548 0.339342)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.314e-07 1.076e-08
25- 50 2.449e-07 2.634e-08
50-150 4.912e-07 1.689e-07
15-150 8.676e-07 2.233e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.74234 (-1.25912 1.31835)
R1^2/D10^2 : 0.873790 (-0.347353 0.702581)
kT2 [keV] : 28.9998 (-6.03521 11.4603)
R2^2/D10^2 : 7.93398E-03 (-0.00528316 0.0108584)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.211e-07 2.129e-08
25- 50 2.556e-07 4.369e-08
50-150 5.007e-07 1.819e-07
15-150 8.774e-07 2.320e-07
Peak spectrum fit
Power-law model
Time interval is from 0.308 sec. to 1.308 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30795 ( -0.164045 0.163452 )
Norm@50keV : 1.91154E-02 ( -0.00181553 0.00181388 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.48 using 59 PHA bins.
# Reduced chi-squared = 1.149 for 57 degrees of freedom
# Null hypothesis probability = 2.061647e-01
Photon flux (15-150 keV) in 1 sec: 2.28381 ( -0.222532 0.223172 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.88531e-07 ( -1.97691e-08 1.99253e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.308 sec. to 1.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.676457 ( -0.794929 0.639254 )
Epeak [keV] : 109.413 ( -35.9313 -109.412 )
Norm@50keV : 3.87121E-02 ( -0.0199068 0.0540143 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.87 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 56 degrees of freedom
# Null hypothesis probability = 2.461893e-01
Photon flux (15-150 keV) in 1 sec: 2.21835 ( -0.23366 0.23347 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.8038e-07 ( -2.2275e-08 2.1997e-08 ) ergs/cm2
Band function
Time interval is from 0.308 sec. to 1.308 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.331950 ( -1.59168 3.09085 )
beta : -1.63157 ( 1.63017 0.330279 )
Epeak [keV] : 58.7222 ( -25.5577 170.957 )
Norm@50keV : 0.156901 ( -0.160944 92.3701 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.56 using 59 PHA bins.
# Reduced chi-squared = 1.119 for 55 degrees of freedom
# Null hypothesis probability = 2.528336e-01
Photon flux (15-150 keV) in 1 sec: 2.18943 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.5047 (-1.92713 2.28962)
R^2/D10^2 : 0.194803 (-0.0697987 0.103773)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.089e-08 2.043e-09
25- 50 4.705e-08 5.955e-09
50-150 9.060e-08 1.703e-08
15-150 1.485e-07 1.895e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-33.3368 -200)
Norm : 9.48810 (-0.90478 0.90478)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.363e-08 1.238e-08
25- 50 4.546e-08 1.882e-08
50-150 9.970e-08 5.158e-08
15-150 1.688e-07 8.938e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.3121 (-2.954 3.00522)
R1^2/D10^2 : 0.651162 (-0.328052 0.526123)
kT2 [keV] : 37.2663 (-13.9028 -37.3447)
R2^2/D10^2 : 8.81945E-03 (-0.0086126 0.0379862)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.590e-08 6.823e-09
25- 50 4.804e-08 2.418e-08
50-150 1.179e-07 6.011e-08
15-150 1.819e-07 8.339e-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: 1.65526 ( -0.105068 0.106015 )
Norm@50keV : 8.16980E-03 ( -0.000481979 0.000480032 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.52 using 59 PHA bins.
# Reduced chi-squared = 0.9565 for 57 degrees of freedom
# Null hypothesis probability = 5.685744e-01
Photon flux (15-150 keV) in 11.76 sec: 1.06863 ( -0.0638186 0.0639905 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.93085e-07 ( -5.56219e-08 5.59133e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43359 ( -0.437783 0.276263 )
Epeak [keV] : 127.131 ( )
Norm@50keV : 1.05665E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.65 using 59 PHA bins.
# Reduced chi-squared = 0.9581 for 56 degrees of freedom
# Null hypothesis probability = 5.642744e-01
Photon flux (15-150 keV) in 11.76 sec: 1.05454 ( -0.068449 0.06855 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.77312e-07 ( -6.3357e-08 6.28537e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.820017 ( 0.96643 5.5425 )
beta : -1.76985 ( -0.26635 0.166886 )
Epeak [keV] : 51.4186 ( -50.7097 -50.7097 )
Norm@50keV : 2.60648E-02 ( -0.0276865 922088 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.70 using 59 PHA bins.
# Reduced chi-squared = 0.9582 for 55 degrees of freedom
# Null hypothesis probability = 5.629813e-01
Photon flux (15-150 keV) in 11.76 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.75312e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 2.37e-07
S(50-100 keV) = 3.01e-07
T90 vs. Hardness ratio plot
T90 = 9.17199993133545 sec.
Hardness ratio (energy fluence ratio) = 1.27004
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.31426
Count Ratio (50-100 keV) / (15-25 keV) = 0.858776
Mask shadow pattern
IMX = -2.884303790459658E-01, IMY = -2.840789001604680E-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:
-60.808000 0.096000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.1047 -60.5438 20.0 39.4 -53.8 -0.1275 -0.6 7.8 Cen X-3
186.9403 -62.7924 13.5 33.6 -63.7 0.1554 0.9 7.9 GX 301-2
244.9786 -15.6375 0.8 31.3 150.2 2.5602 14.5 0.2 Sco X-1
255.9354 -37.8651 1.6 30.9 -161.8 1.0129 7.1 2.7 4U 1700-377
256.4467 -36.4037 5.1 31.5 -164.5 0.3191 2.3 1.3 GX 349+2
263.0173 -24.7614 6.0 40.4 179.5 0.3607 1.9 1.1 GX 1+4
264.7472 -44.4507 1872.0 37.0 -149.1 -0.0010 -0.0 0.2 4U 1735-44
270.2650 -25.0797 191.9 46.2 -175.9 0.0154 0.1 1.0 GX 5-1
270.3109 -25.6160 244.8 46.0 -175.3 -0.0119 -0.0 7.6 GRS 1758-258
274.0040 -14.0354 84.6 54.7 173.8 0.0660 0.1 0.1 GX 17+2
275.9159 -30.3497 46.6 48.7 -166.7 -0.0717 -0.2 1.1 H1820-303
285.0384 -24.9215 32.9 58.3 -168.6 -0.2493 -0.4 0.1 HT1900.1-2455
263.1382 -33.7491 3.3 37.4 -167.0 0.5397 3.5 9.0 GX 354-0
171.9027 -30.3361 2.8 38.3 -4.8 0.6743 4.2 ------ UNKNOWN
288.7031 -47.0845 2.6 53.2 -142.2 2.5373 4.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.096000 11.860000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3300 -60.6020 5.0 39.4 -54.0 0.2250 2.3 1.3 Cen X-3
186.9200 -62.8207 57.6 33.6 -63.8 -0.0150 -0.2 7.8 GX 301-2
244.8299 -15.6653 4.2 31.2 150.1 -0.1876 -2.7 8.8 Sco X-1
255.8209 -37.9157 4.6 30.8 -161.7 -0.1462 -2.5 8.9 4U 1700-377
256.2982 -36.4743 4.3 31.3 -164.4 0.1593 2.7 7.3 GX 349+2
263.0894 -24.8375 6.6 40.5 179.7 -0.1347 -1.8 7.0 GX 1+4
264.7924 -44.5865 25.9 37.0 -148.9 -0.0314 -0.4 8.5 4U 1735-44
270.2353 -24.9961 3.8 46.2 -176.1 0.2936 3.1 5.6 GX 5-1
270.3039 -25.6998 19.0 46.0 -175.1 -0.0574 -0.6 2.6 GRS 1758-258
273.8954 -13.9856 7.8 54.7 173.7 -0.3206 -1.5 7.1 GX 17+2
275.8862 -30.2601 8.5 48.7 -166.8 -0.1425 -1.4 6.7 H1820-303
285.0365 -25.0436 5.7 58.3 -168.5 0.5794 2.0 7.4 HT1900.1-2455
263.1761 -33.8818 5.7 37.4 -166.8 0.1218 2.0 9.7 GX 354-0
169.0190 -5.4370 2.4 53.5 23.4 1.3540 4.8 ------ UNKNOWN
260.3162 -10.5366 2.4 45.9 159.9 0.6029 4.9 ------ UNKNOWN
233.3948 -18.1009 0.4 22.0 135.4 1.6250 28.1 ------ UNKNOWN
155.4278 -30.0383 2.4 51.7 -11.6 0.5318 4.7 ------ UNKNOWN
166.4163 -43.2332 2.4 39.8 -26.3 0.3506 4.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
137.092600 242.244300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.5599 -62.7937 6.1 55.0 14.6 -1.5952 -1.9 3.0 GX 301-2
244.9593 -15.6174 0.5 11.3 -110.4 3.9510 21.6 1.8 Sco X-1
254.4988 35.3732 8.4 57.1 -169.0 1.0127 1.4 2.7 Her X-1
256.0295 -37.8956 1.7 28.0 -49.8 1.5352 6.6 3.7 4U 1700-377
256.4028 -36.2851 4.2 27.2 -52.9 0.6036 2.8 8.4 GX 349+2
262.8434 -24.6334 5.6 28.1 -80.9 0.5012 2.1 11.3 GX 1+4
264.5512 -44.4527 6.1 37.0 -47.2 -0.5169 -1.9 8.2 4U 1735-44
268.3708 -1.4507 97.5 38.1 -121.4 -0.0411 -0.1 0.2 SW J1753.5-0127
270.4558 -25.1859 0.0 35.0 -81.2 0.2189 0.6 11.3 GX 5-1
270.2076 -25.6285 10.9 34.8 -80.4 0.4013 1.1 8.6 GRS 1758-258
273.8736 -13.9310 3.9 39.0 -99.5 1.8144 3.0 10.0 GX 17+2
275.8855 -30.3803 3.1 40.4 -73.5 2.5202 3.7 2.2 H1820-303
262.8346 -33.8805 3.8 30.6 -62.6 0.7263 3.0 8.2 GX 354-0
198.3944 -16.8753 2.8 33.4 77.2 1.7147 4.2 ------ UNKNOWN
191.5580 -47.5789 2.3 45.0 30.1 1.9531 5.1 ------ UNKNOWN
209.2774 -67.0075 3.0 51.3 2.4 1.4546 3.8 ------ UNKNOWN
242.5840 37.8882 2.7 56.6 179.2 3.6753 4.4 ------ UNKNOWN
258.2054 23.0410 2.4 47.7 -158.0 1.8845 4.8 ------ UNKNOWN
Plot creation:
Fri May 2 05:14:37 EDT 2025