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
261.9699 -16.3964 0.0905 30.9 -146.4 3.8709 2.1 TRIG_01187207
------------------------------------------
Foreground time interval of the image:
-112.268 178.664 (delta_t = 290.932 [sec])
Background time interval of the image:
-119.000 -112.268 (delta_t = 6.732 [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 -112.268 sec. to 178.664 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.91807 ( )
Norm@50keV : 1.05897E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 133.17 using 59 PHA bins.
# Reduced chi-squared = 2.3364 for 57 degrees of freedom
# Null hypothesis probability = 4.903211e-08
Photon flux (15-150 keV) in 290.9 sec: 2.74561 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.56864e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -112.268 sec. to 178.664 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98453 ( -0.150237 -1.98453 )
Epeak [keV] : 0.769990 ( -0.0357806 0.0364746 )
Norm@50keV : 3.16707E-02 ( -0.000575153 0.00150907 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.35 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 56 degrees of freedom
# Null hypothesis probability = 4.616995e-01
Photon flux (15-150 keV) in 290.9 sec: 2.46068 ( -0.08542 0.08664 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.28318e-05 ( -8.57282e-07 8.63682e-07 ) ergs/cm2
Band function
Time interval is from -112.268 sec. to 178.664 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.74986 ( )
beta : -8.96818 ( )
Epeak [keV] : 12.2397 ( )
Norm@50keV : 3.29821E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 127.76 using 59 PHA bins.
# Reduced chi-squared = 2.3228 for 55 degrees of freedom
# Null hypothesis probability = 1.013815e-07
Photon flux (15-150 keV) in 290.9 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] : 9.24012 ( )
R^2/D10^2 : 1.18249 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 612.58 using 59 PHA bins.
# Reduced chi-squared = 10.747 for 57 degrees of freedom
# Null hypothesis probability = 4.274699e-94
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.793e-06 2.065e-07
25- 50 1.282e-05 2.720e-07
50-150 5.300e-06 1.905e-07
15-150 2.392e-05 4.567e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.7841 (-0.964241 1.00919)
Norm : 18.1493 (-0.83071 0.869189)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.089e-05 3.113e-07
25- 50 1.262e-05 2.356e-07
50-150 7.145e-06 2.385e-07
15-150 3.065e-05 6.109e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.87476 (-0.324403 0.325796)
R1^2/D10^2 : 7.20907 (-1.45681 1.98918)
kT2 [keV] : 15.7558 (-1.0357 1.21792)
R2^2/D10^2 : 6.29578E-02 (-0.0199289 0.0268604)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.027e-05 6.356e-07
25- 50 1.279e-05 3.869e-07
50-150 7.500e-06 4.218e-07
15-150 3.056e-05 1.094e-06
Peak spectrum fit
Power-law model
Time interval is from 167.576 sec. to 168.576 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.83944 ( -0.168398 0.179333 )
Norm@50keV : 1.63947E-02 ( -0.00218925 0.00218979 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.04 using 59 PHA bins.
# Reduced chi-squared = 1.299 for 57 degrees of freedom
# Null hypothesis probability = 6.408949e-02
Photon flux (15-150 keV) in 1 sec: 4.02216 ( -0.321386 0.321632 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.838e-07 ( -1.60257e-08 1.62143e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 167.576 sec. to 168.576 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33112 ( -1.09515 0.584086 )
Epeak [keV] : 14.8770 ( )
Norm@50keV : 0.157850 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.08 using 59 PHA bins.
# Reduced chi-squared = 1.162 for 56 degrees of freedom
# Null hypothesis probability = 1.899797e-01
Photon flux (15-150 keV) in 1 sec: 3.87900 ( -0.32899 0.32978 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.67446e-07 ( -1.5856e-08 1.7002e-08 ) ergs/cm2
Band function
Time interval is from 167.576 sec. to 168.576 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.42138 ( )
beta : -9.08872 ( )
Epeak [keV] : 31.6971 ( )
Norm@50keV : 5.73290E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 115.08 using 59 PHA bins.
# Reduced chi-squared = 2.0924 for 55 degrees of freedom
# Null hypothesis probability = 3.871016e-06
Photon flux (15-150 keV) in 1 sec: ( ) 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] : 6.47499 (-0.547342 0.592948)
R^2/D10^2 : 10.2679 (-3.33689 5.05607)
(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 6.331e-08 8.505e-09
25- 50 7.419e-08 8.700e-09
50-150 9.194e-09 2.959e-09
15-150 1.467e-07 1.430e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.3736 (-3.4704 4.2007)
Norm : 40.6591 (-7.22445 9.12363)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.115e-08 7.700e-09
25- 50 6.976e-08 6.930e-09
50-150 2.682e-08 7.480e-09
15-150 1.677e-07 1.615e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.28515 (-0.977194 1.01474)
R1^2/D10^2 : 44.4015 (-24.6578 86.0442)
kT2 [keV] : 10.5116 (-2.19212 4.16868)
R2^2/D10^2 : 0.720441 (-0.598011 1.81374)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.229e-08 3.627e-08
25- 50 6.827e-08 3.470e-08
50-150 2.683e-08 1.556e-08
15-150 1.674e-07 8.560e-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: 2.91807 ( )
Norm@50keV : 1.05897E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 133.17 using 59 PHA bins.
# Reduced chi-squared = 2.3364 for 57 degrees of freedom
# Null hypothesis probability = 4.903211e-08
Photon flux (15-150 keV) in 290.9 sec: 2.74561 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.56864e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98453 ( -0.150237 -1.98453 )
Epeak [keV] : 0.769990 ( -0.0357806 0.0364746 )
Norm@50keV : 3.16707E-02 ( -0.000779257 0.00150898 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.35 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 56 degrees of freedom
# Null hypothesis probability = 4.616995e-01
Photon flux (15-150 keV) in 290.9 sec: 2.46068 ( -0.08542 0.08664 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.28318e-05 ( -8.57282e-07 8.63682e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.74986 ( )
beta : -8.96818 ( )
Epeak [keV] : 12.2397 ( )
Norm@50keV : 3.29821E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 127.76 using 59 PHA bins.
# Reduced chi-squared = 2.3228 for 55 degrees of freedom
# Null hypothesis probability = 1.013815e-07
Photon flux (15-150 keV) in 290.9 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) = 1.20e-05
S(50-100 keV) = 6.33e-06
T90 vs. Hardness ratio plot
T90 = 175.391999959946 sec.
Hardness ratio (energy fluence ratio) = 0.5275
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.800358
Count Ratio (50-100 keV) / (15-25 keV) = 0.220783
Mask shadow pattern
IMX = -4.982111340441220E-01, IMY = 3.306802726601361E-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:
-119.000000 -112.268000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9946 -15.6014 7.2 44.1 -130.3 0.1705 1.6 2.5 Sco X-1
254.3462 35.1992 5.8 40.5 -49.9 0.1560 2.0 10.2 Her X-1
255.9788 -37.8377 21.5 50.5 -162.4 -0.0512 -0.5 0.5 4U 1700-377
256.3492 -36.2286 0.0 49.0 -161.4 -0.1768 -2.0 12.4 GX 349+2
263.1086 -24.6977 4.3 36.4 -157.9 0.1487 2.7 6.1 GX 1+4
264.6146 -44.4380 22.9 52.8 -173.8 0.0525 0.5 5.5 4U 1735-44
268.3721 -1.4441 81.1 17.1 -124.2 0.0064 0.1 0.6 SW J1753.5-0127
270.2322 -24.9111 3.9 33.1 -167.8 0.1366 3.0 10.5 GX 5-1
270.4408 -25.7612 6.1 33.8 -168.8 -0.0908 -1.9 7.6 GRS 1758-258
274.0182 -13.8859 5.1 21.7 -163.8 0.0852 2.2 9.1 GX 17+2
275.9035 -30.2084 12.0 36.4 -179.2 -0.0513 -1.0 9.6 H1820-303
285.1961 -24.7933 9.1 30.2 166.8 0.0617 1.3 11.6 HT1900.1-2455
288.9089 11.0753 4.5 7.4 28.0 -0.1020 -2.6 10.1 GRS 1915+105
299.5384 35.1873 1.7 33.0 12.2 0.3651 7.0 2.7 Cyg X-1
308.1173 40.9181 5.2 41.5 16.3 0.1604 2.2 2.1 Cyg X-3
326.1722 38.3240 60.2 50.4 31.8 0.0374 0.2 0.1 Cyg X-2
263.0096 -33.7214 6.1 43.9 -165.6 -0.1299 -1.9 6.9 GX 354-0
305.3843 -9.2316 2.6 25.7 113.2 0.2434 4.5 ------ UNKNOWN
261.9290 -16.1986 0.4 30.8 -146.1 1.6162 32.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-112.268000 178.664000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9298 -15.5592 13.2 44.1 -130.2 -3.6849 -0.9 5.6 Sco X-1
254.3803 35.4655 6.6 40.7 -49.6 -5.4839 -1.8 8.3 Her X-1
255.9321 -37.8686 6.7 50.5 -162.4 6.1611 1.7 3.0 4U 1700-377
256.3492 -36.2286 0.0 49.0 -161.4 6.6305 2.0 12.4 GX 349+2
263.0810 -24.6821 4.6 36.4 -157.9 -5.2829 -2.5 5.5 GX 1+4
264.6922 -44.4370 14.5 52.8 -173.9 -3.0289 -0.8 2.3 4U 1735-44
268.2255 -1.5707 6.8 17.3 -124.4 2.8305 1.7 11.1 SW J1753.5-0127
270.3970 -25.2118 6.1 33.4 -168.3 3.4491 1.9 10.0 GX 5-1
270.4308 -25.8053 5.7 33.9 -168.8 3.7377 2.0 7.9 GRS 1758-258
274.0129 -13.8847 5.4 21.7 -163.8 -3.1916 -2.1 9.1 GX 17+2
276.1000 -30.2483 0.0 36.4 -179.5 1.3126 0.6 11.5 H1820-303
284.9357 -24.7573 177.7 30.1 167.3 0.1204 0.1 11.2 HT1900.1-2455
288.9036 11.0737 4.5 7.4 28.0 3.6309 2.6 9.9 GRS 1915+105
299.4318 35.2075 4.9 33.0 12.0 -4.4722 -2.4 7.8 Cyg X-1
308.1184 40.8700 4.5 41.5 16.4 -7.0187 -2.6 5.0 Cyg X-3
326.2089 38.4523 8.1 50.5 31.6 -9.9541 -1.4 8.0 Cyg X-2
263.0294 -33.7423 6.0 43.9 -165.7 4.9510 1.9 5.9 GX 354-0
278.9347 -49.3400 2.2 54.9 172.9 32.7376 5.2 ------ UNKNOWN
262.6540 30.6207 2.4 32.3 -47.3 10.1653 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Sat Aug 26 16:05:50 EDT 2023