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
56.8262 -29.3380 0.0298 1.0725 136.9050 0.2607231 6.444 TRIG_00868312
Foreground time interval of the image:
-1.644 7.964 (delta_t = 9.608 [sec])
Background time interval of the image:
-239.944 -1.644 (delta_t = 238.300 [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 5.504000
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 5.504000
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 5.504000
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 -1.644 sec. to 7.964 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.961890 ( -0.462632 0.426004 )
Norm@50keV : 1.78590E-03 ( -0.000429643 0.000425131 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.86 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 57 degrees of freedom
# Null hypothesis probability = 3.722022e-01
Photon flux (15-150 keV) in 9.608 sec: 0.205262 ( -0.049519 0.049805 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.88136e-07 ( -4.88645e-08 4.97028e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.644 sec. to 7.964 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.955856 ( -1.99715 -0.737134 )
Epeak [keV] : 9987.73 ( -9960.41 -9960.41 )
Norm@50keV : 1.79704E-03 ( -0.000423718 0.0116876 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.86 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 56 degrees of freedom
# Null hypothesis probability = 3.374076e-01
Photon flux (15-150 keV) in 9.608 sec: 0.204505 ( -0.051965 0.050372 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.8725e-07 ( -5.25021e-08 5.03205e-08 ) ergs/cm2
Band function
Time interval is from -1.644 sec. to 7.964 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] : 23.6982 (-6.54315 11.1287)
R^2/D10^2 : 5.81522E-03 (-0.00394255 0.0100726)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.64 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 57 degrees of freedom
# Null hypothesis probability = 2.831666e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.603e-09 3.352e-09
25- 50 3.091e-08 1.609e-08
50-150 1.295e-07 7.153e-08
15-150 1.660e-07 8.921e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-75.8636 -200)
Norm : 0.824058 (-0.204653 0.204653)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.92 using 59 PHA bins.
# Reduced chi-squared = 1.139 for 57 degrees of freedom
# Null hypothesis probability = 2.200591e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.971e-08 1.184e-08
25- 50 3.792e-08 2.311e-08
50-150 8.317e-08 4.958e-08
15-150 1.408e-07 8.450e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.64861 (-2.99534 6.03025)
R1^2/D10^2 : 0.314629 (-0.303827 7.4106)
kT2 [keV] : 30.5749 (-10.1208 67.6478)
R2^2/D10^2 : 2.47341E-03 (-0.00224628 0.00644101)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.86 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 55 degrees of freedom
# Null hypothesis probability = 3.362022e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.512e-08 9.555e-09
25- 50 3.155e-08 1.640e-08
50-150 1.407e-07 8.441e-08
15-150 1.873e-07 1.058e-07
Peak spectrum fit
Power-law model
Time interval is from 4.404 sec. to 5.404 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19232 ( -0.635132 0.645684 )
Norm@50keV : 3.53582E-03 ( -0.00135222 0.00134487 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.16 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 57 degrees of freedom
# Null hypothesis probability = 3.967057e-01
Photon flux (15-150 keV) in 1 sec: 0.414595 ( -0.157749 0.158047 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.59534e-08 ( -1.52033e-08 1.57918e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.404 sec. to 5.404 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.11123 ( 1.15332 3.41279 )
Epeak [keV] : 75.4480 ( -24.3332 -75.1398 )
Norm@50keV : 3.80843E-02 ( -0.040345 104.644 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.79 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 56 degrees of freedom
# Null hypothesis probability = 4.090747e-01
Photon flux (15-150 keV) in 1 sec: 0.378558 ( -0.187768 0.169491 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26926e-08 ( -1.39884e-08 1.64027e-08 ) ergs/cm2
Band function
Time interval is from 4.404 sec. to 5.404 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] : 18.8505 (-5.8492 9.49696)
R^2/D10^2 : 2.52975E-02 (-0.0252991 0.05837)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.68 using 59 PHA bins.
# Reduced chi-squared = 1.012 for 57 degrees of freedom
# Null hypothesis probability = 4.500716e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.772e-09 1.188e-09
25- 50 8.475e-09 5.170e-09
50-150 2.210e-08 1.431e-08
15-150 3.234e-08 2.056e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.357 (-199.361 -199.361)
Norm : 1.67865 (-0.646049 0.646842)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.77 using 59 PHA bins.
# Reduced chi-squared = 1.049 for 57 degrees of freedom
# Null hypothesis probability = 3.752926e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.180e-09 2.711e-09
25- 50 8.041e-09 5.180e-09
50-150 1.763e-08 1.144e-08
15-150 2.986e-08 1.902e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.40348 (-2.408 24.3247)
R1^2/D10^2 : 28.4081 (-28.2494 -28.2494)
kT2 [keV] : 19.7787 (-6.284 -19.7792)
R2^2/D10^2 : 2.09592E-02 (-0.020957 0.0506144)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.05 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 55 degrees of freedom
# Null hypothesis probability = 3.988150e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.752e-09 1.345e-09
25- 50 7.922e-09 4.852e-09
50-150 2.273e-08 1.524e-08
15-150 3.340e-08 2.227e-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: 0.961890 ( -0.462632 0.426004 )
Norm@50keV : 1.78590E-03 ( -0.000429643 0.000425131 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.86 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 57 degrees of freedom
# Null hypothesis probability = 3.722022e-01
Photon flux (15-150 keV) in 9.608 sec: 0.205267 ( -0.0495185 0.0498025 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.88128e-07 ( -4.88578e-08 4.97695e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.880268 ( )
Epeak [keV] : 784.671 ( )
Norm@50keV : 1.94260E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.86 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 56 degrees of freedom
# Null hypothesis probability = 3.376342e-01
Photon flux (15-150 keV) in 9.608 sec: 0.204494 ( -0.051968 0.050361 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.87339e-07 ( -5.23876e-08 5.03286e-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) = 3.40e-08
S(50-100 keV) = 6.98e-08
T90 vs. Hardness ratio plot
T90 = 7.93599998950958 sec.
Hardness ratio (energy fluence ratio) = 2.05294
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.38114
Count Ratio (50-100 keV) / (15-25 keV) = 1.59866
Mask shadow pattern
IMX = -1.367079274893475E-02, IMY = -1.279064624783077E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 5.504000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 5.504000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 5.504000
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:
-239.944000 -1.644000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
13.7721 -26.7913 2.4 37.7 40.1 2.1671 4.7 ------ UNKNOWN
9.1182 -30.5130 2.9 40.8 32.9 1.8259 4.0 ------ UNKNOWN
334.0981 -66.4745 3.0 59.5 -17.0 5.5291 3.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-1.644000 7.964000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
353.5549 -41.9435 2.4 51.2 14.1 0.5963 4.8 ------ UNKNOWN
56.8262 -29.3380 1.8 1.1 136.9 0.2606 6.4 ------ UNKNOWN
23.1272 -70.6138 2.2 44.3 -29.1 0.3914 5.3 ------ UNKNOWN
110.9287 -6.9261 2.5 55.8 -147.7 1.0819 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
76.356600 962.171100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
354.2107 -32.4129 3.2 53.0 19.5 10.3026 3.7 ------ UNKNOWN
5.7383 -30.4144 3.2 43.9 25.1 4.2180 3.6 ------ UNKNOWN
352.1845 -47.7740 3.0 52.1 0.0 5.3932 3.9 ------ UNKNOWN
92.0481 -42.8151 4.7 31.2 -105.0 2.5897 2.4 ------ UNKNOWN
Plot creation:
Mon Dec 17 21:15:58 EST 2018