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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
282.3127 -9.1508 0.0063 50.7179 -31.0364 16.3212599 30.525 TRIG_00107547
Foreground time interval of the image:
-3.420 187.800 (delta_t = 191.220 [sec])
Background time interval of the image:
-299.296 -3.420 (delta_t = 295.876 [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
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)
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 -3.420 sec. to 187.800 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46657 ( -0.0653735 0.0651493 )
Norm@50keV : 6.34006E-03 ( -0.000235475 0.000235362 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.09 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 57 degrees of freedom
# Null hypothesis probability = 4.348099e-01
Photon flux (15-150 keV) in 191.2 sec: 0.784589 ( -0.0331811 0.0333237 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15654e-05 ( -4.3481e-07 4.35001e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.420 sec. to 187.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08701 ( -0.281111 0.265002 )
Epeak [keV] : 140.509 ( -36.0118 173.394 )
Norm@50keV : 9.28516E-03 ( -0.00212199 0.00291751 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.99 using 59 PHA bins.
# Reduced chi-squared = 0.9284 for 56 degrees of freedom
# Null hypothesis probability = 6.273298e-01
Photon flux (15-150 keV) in 191.2 sec: 0.764847 ( -0.035513 0.035711 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14079e-05 ( -4.52915e-07 4.51672e-07 ) ergs/cm2
Band function
Time interval is from -3.420 sec. to 187.800 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.08698 ( -0.229995 0.318169 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 140.482 ( -31.8288 173.312 )
Norm@50keV : 9.28447E-03 ( -0.00212183 0.00291804 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.99 using 59 PHA bins.
# Reduced chi-squared = 0.9453 for 55 degrees of freedom
# Null hypothesis probability = 5.903103e-01
Photon flux (15-150 keV) in 191.2 sec: 0.765342 ( ) 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] : 18.6200 ( )
R^2/D10^2 : 4.19630E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 188.06 using 59 PHA bins.
# Reduced chi-squared = 3.2993 for 57 degrees of freedom
# Null hypothesis probability = 6.560068e-16
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.507e-07 4.082e-08
25- 50 2.611e-06 1.472e-07
50-150 6.625e-06 3.728e-07
15-150 9.786e-06 4.015e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 3.28484 (-0.121372 0.12135)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.83 using 59 PHA bins.
# Reduced chi-squared = 1.120 for 57 degrees of freedom
# Null hypothesis probability = 2.489737e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.564e-06 6.740e-08
25- 50 3.009e-06 1.329e-07
50-150 6.600e-06 2.830e-07
15-150 1.117e-05 4.799e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.80174 (-0.995275 1.13642)
R1^2/D10^2 : 0.792785 (-0.333791 0.653798)
kT2 [keV] : 26.0020 (-2.2758 3.01341)
R2^2/D10^2 : 1.10753E-02 (-0.00373888 0.0046076)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.57 using 59 PHA bins.
# Reduced chi-squared = 0.9376 for 55 degrees of freedom
# Null hypothesis probability = 6.065085e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.336e-06 2.324e-07
25- 50 2.823e-06 2.572e-07
50-150 7.227e-06 6.080e-07
15-150 1.139e-05 8.833e-07
Peak spectrum fit
Power-law model
Time interval is from 107.852 sec. to 108.852 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19431 ( -0.211488 0.206099 )
Norm@50keV : 2.99622E-02 ( -0.00375427 0.00373633 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.09 using 59 PHA bins.
# Reduced chi-squared = 0.9139 for 57 degrees of freedom
# Null hypothesis probability = 6.592724e-01
Photon flux (15-150 keV) in 1 sec: 3.51414 ( -0.467659 0.470985 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.04468e-07 ( -3.86579e-08 3.87404e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 107.852 sec. to 108.852 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.651353 ( -1.03482 0.64023 )
Epeak [keV] : 147.577 ( )
Norm@50keV : 5.14582E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.93 using 59 PHA bins.
# Reduced chi-squared = 0.9094 for 56 degrees of freedom
# Null hypothesis probability = 6.668311e-01
Photon flux (15-150 keV) in 1 sec: 3.43297 ( -0.4836 0.48702 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.00467e-07 ( -4.0168e-08 3.9755e-08 ) ergs/cm2
Band function
Time interval is from 107.852 sec. to 108.852 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.469278 ( 0.606514 2.13311 )
beta : -1.48982 ( 1.71507 0.678307 )
Epeak [keV] : 112.583 ( -110.825 1990.83 )
Norm@50keV : 6.50970E-02 ( -0.0388486 1.78668e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.87 using 59 PHA bins.
# Reduced chi-squared = 0.9248 for 55 degrees of freedom
# Null hypothesis probability = 6.332239e-01
Photon flux (15-150 keV) in 1 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] : 20.8259 (-2.91504 3.58439)
R^2/D10^2 : 0.145197 (-0.0598602 0.0956727)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.49 using 59 PHA bins.
# Reduced chi-squared = 1.044 for 57 degrees of freedom
# Null hypothesis probability = 3.850743e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.194e-08 3.052e-09
25- 50 6.105e-08 1.182e-08
50-150 1.972e-07 3.955e-08
15-150 2.702e-07 4.340e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 15.0900 (-1.89388 1.89354)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.59 using 59 PHA bins.
# Reduced chi-squared = 1.063 for 57 degrees of freedom
# Null hypothesis probability = 3.475436e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.759e-08 2.121e-08
25- 50 7.231e-08 4.037e-08
50-150 1.586e-07 8.890e-08
15-150 2.685e-07 1.472e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.71988 (-5.25942 8.54197)
R1^2/D10^2 : 1.23383 (-0.988096 36.8369)
kT2 [keV] : 30.1450 (-9.27103 -30.3654)
R2^2/D10^2 : 3.52624E-02 (-0.0336357 0.0978474)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.56 using 59 PHA bins.
# Reduced chi-squared = 0.9374 for 55 degrees of freedom
# Null hypothesis probability = 6.069461e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.295e-08 1.310e-08
25- 50 6.719e-08 3.589e-08
50-150 2.105e-07 1.109e-07
15-150 3.006e-07 1.524e-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: 1.46657 ( -0.0653735 0.0651493 )
Norm@50keV : 6.34006E-03 ( -0.000235475 0.000235362 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.09 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 57 degrees of freedom
# Null hypothesis probability = 4.348099e-01
Photon flux (15-150 keV) in 191.2 sec: 0.784589 ( -0.0331811 0.0333237 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15654e-05 ( -4.3481e-07 4.35001e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08701 ( -0.281111 0.265002 )
Epeak [keV] : 140.509 ( -36.0118 173.394 )
Norm@50keV : 9.28516E-03 ( -0.00212199 0.00291751 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.99 using 59 PHA bins.
# Reduced chi-squared = 0.9284 for 56 degrees of freedom
# Null hypothesis probability = 6.273298e-01
Photon flux (15-150 keV) in 191.2 sec: 0.764847 ( -0.035513 0.035711 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14079e-05 ( -4.52915e-07 4.51672e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.08698 ( -0.22997 0.318215 )
beta : -10.0000 ( 10 3.19744e-14 )
Epeak [keV] : 140.482 ( -31.8352 173.312 )
Norm@50keV : 9.28447E-03 ( -0.00212182 0.00291805 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.99 using 59 PHA bins.
# Reduced chi-squared = 0.9453 for 55 degrees of freedom
# Null hypothesis probability = 5.903103e-01
Photon flux (15-150 keV) in 191.2 sec: 0.765342 ( ) 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) = 2.81e-06
S(50-100 keV) = 4.07e-06
T90 vs. Hardness ratio plot
T90 = 158.524000003934 sec.
Hardness ratio (energy fluence ratio) = 1.4484
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.54262
Count Ratio (50-100 keV) / (15-25 keV) = 1.45073
Mask shadow pattern
IMX = 1.047522639628722E+00, IMY = 6.303208238792297E-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:
-299.296000 -3.420000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9951 -15.6469 0.7 50.8 17.3 10.3449 16.5 1.0 Sco X-1
254.4220 35.3270 1.1 1.1 174.4 1.6901 10.3 2.0 Her X-1
268.4910 -1.4284 7.8 38.0 -17.6 0.3194 1.5 7.5 SW J1753.5-0127
273.9751 -14.1657 21.6 51.8 -18.8 -0.2468 -0.5 8.0 GX 17+2
288.7799 10.9622 1.0 38.9 -56.1 4.3302 11.7 1.5 GRS 1915+105
299.5583 35.2086 0.4 36.6 -99.4 12.2648 26.8 1.6 Cyg X-1
308.2202 40.9279 3.3 42.3 -110.1 2.4301 3.4 5.2 Cyg X-3
263.6056 -14.6629 3.2 49.7 -6.1 1.4235 3.6 ------ UNKNOWN
47.4903 88.3354 3.6 57.2 -173.9 2.9002 3.2 ------ UNKNOWN
296.2341 13.1254 2.7 43.1 -65.7 3.2493 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-3.420000 187.800000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9719 -15.7863 5.7 50.9 17.3 1.1624 2.0 8.8 Sco X-1
254.2951 35.1989 82.9 1.0 164.0 0.0199 0.1 11.7 Her X-1
268.4972 -1.3212 16.4 37.9 -17.6 -0.1491 -0.7 11.1 SW J1753.5-0127
273.8778 -14.1867 7.2 51.8 -18.7 0.7793 1.6 11.7 GX 17+2
288.7774 10.9444 7.0 38.8 -56.1 0.6385 1.6 1.2 GRS 1915+105
299.7462 35.1142 2.6 36.7 -99.3 -1.8229 -4.4 9.3 Cyg X-1
308.1565 40.8254 53.2 42.2 -110.0 0.1575 0.2 7.9 Cyg X-3
247.0871 -14.6419 2.0 49.5 14.9 2.5338 5.7 ------ UNKNOWN
246.3912 20.7708 2.1 15.4 35.8 0.8447 5.5 ------ UNKNOWN
6.5102 82.0764 3.0 58.9 -166.2 3.4878 3.8 ------ UNKNOWN
282.3127 -9.1508 0.4 50.7 -31.0 16.3194 30.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
-299.296000 302.784300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9883 -15.6289 0.6 50.8 17.3 19.3357 18.7 0.9 Sco X-1
254.4688 35.3501 1.0 1.1 174.1 3.2909 11.4 0.7 Her X-1
268.3822 -1.4503 22.5 38.0 -17.4 0.1916 0.5 0.9 SW J1753.5-0127
274.0208 -14.1118 29.9 51.8 -18.9 -0.3356 -0.4 4.6 GX 17+2
288.8069 10.9490 0.8 38.9 -56.1 9.3170 14.6 0.5 GRS 1915+105
299.5951 35.1950 0.4 36.6 -99.4 23.8425 26.8 0.5 Cyg X-1
308.2313 40.9000 3.3 42.2 -110.1 4.6805 3.5 6.3 Cyg X-3
265.6164 5.3660 3.3 30.6 -16.5 1.1179 3.5 ------ UNKNOWN
347.4339 76.0185 2.8 57.5 -158.2 6.5130 4.1 ------ UNKNOWN
282.3242 -9.1562 0.6 50.7 -31.0 18.4820 20.7 ------ UNKNOWN
Plot creation:
Sun May 31 17:24:49 EDT 2015