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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
225.0941 88.5716 0.0093 41.1401 -56.2264 2.3869696 20.751 TRIG_00359884
Foreground time interval of the image:
-0.804 7.324 (delta_t = 8.128 [sec])
Background time interval of the image:
-8.847 -0.804 (delta_t = 8.043 [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 0.064000
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 0.064000
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 0.064000
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 -0.804 sec. to 7.324 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69947 ( -0.116053 0.117479 )
Norm@50keV : 1.76139E-02 ( -0.00119792 0.00118968 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.16 using 59 PHA bins.
# Reduced chi-squared = 0.9676 for 57 degrees of freedom
# Null hypothesis probability = 5.446038e-01
Photon flux (15-150 keV) in 8.128 sec: 2.33889 ( -0.155531 0.155881 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3256e-06 ( -9.42718e-08 9.47814e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.804 sec. to 7.324 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70010 ( -0.118028 0.116816 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 1.76302E-02 ( -0.00653745 0.010737 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.16 using 59 PHA bins.
# Reduced chi-squared = 0.9850 for 56 degrees of freedom
# Null hypothesis probability = 5.067323e-01
Photon flux (15-150 keV) in 8.128 sec: 2.33875 ( -0.1545 0.15501 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32426e-06 ( -9.7853e-08 9.5569e-08 ) ergs/cm2
Band function
Time interval is from -0.804 sec. to 7.324 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.93793 ( -4.93793 -4.93793 )
beta : -1.75676 ( -0.132771 0.127975 )
Epeak [keV] : 22.2046 ( -6.25423 3.57706 )
Norm@50keV : 4175.03 ( -266.603 1.15479e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.83 using 59 PHA bins.
# Reduced chi-squared = 0.9605 for 55 degrees of freedom
# Null hypothesis probability = 5.580145e-01
Photon flux (15-150 keV) in 8.128 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] : 13.1137 ( )
R^2/D10^2 : 0.399539 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 129.61 using 59 PHA bins.
# Reduced chi-squared = 2.2739 for 57 degrees of freedom
# Null hypothesis probability = 1.406076e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.184e-07 1.512e-08
25- 50 4.117e-07 3.349e-08
50-150 4.499e-07 6.303e-08
15-150 9.800e-07 7.600e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 146.451 (-40.0822 -144.362)
Norm : 9.54911 (-0.727765 0.930289)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.98 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 57 degrees of freedom
# Null hypothesis probability = 4.389501e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.997e-07 1.874e-08
25- 50 3.689e-07 4.324e-08
50-150 7.210e-07 2.758e-07
15-150 1.290e-06 3.052e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.42995 (-1.1657 1.44141)
R1^2/D10^2 : 3.92535 (-1.97157 4.34656)
kT2 [keV] : 26.4428 (-5.3651 10.3735)
R2^2/D10^2 : 2.49428E-02 (-0.016668 0.0323144)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.34 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 55 degrees of freedom
# Null hypothesis probability = 3.883947e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.162e-07 4.938e-08
25- 50 3.615e-07 6.637e-08
50-150 7.418e-07 2.056e-07
15-150 1.319e-06 2.957e-07
Peak spectrum fit
Power-law model
Time interval is from -0.040 sec. to 0.960 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33056 ( -0.114303 0.113727 )
Norm@50keV : 7.11259E-02 ( -0.00475482 0.00475298 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.25 using 59 PHA bins.
# Reduced chi-squared = 1.268 for 57 degrees of freedom
# Null hypothesis probability = 8.394271e-02
Photon flux (15-150 keV) in 1 sec: 8.53511 ( -0.591385 0.592095 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.97758e-07 ( -5.09684e-08 5.11409e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.040 sec. to 0.960 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21722 ( -0.43755 0.174175 )
Epeak [keV] : 367.723 ( -367.727 -367.727 )
Norm@50keV : 8.07611E-02 ( -0.0138461 0.0489807 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.03 using 59 PHA bins.
# Reduced chi-squared = 1.286 for 56 degrees of freedom
# Null hypothesis probability = 7.329675e-02
Photon flux (15-150 keV) in 1 sec: 8.50219 ( -0.60236 0.5998 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.94061e-07 ( -5.3469e-08 5.2822e-08 ) ergs/cm2
Band function
Time interval is from -0.040 sec. to 0.960 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97926 ( -14.8062 -4.97926 )
beta : -1.39620 ( -0.128312 0.125622 )
Epeak [keV] : 24.2929 ( -4.69886 3.91524 )
Norm@50keV : 7551.53 ( -502.058 21818.9 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.70 using 59 PHA bins.
# Reduced chi-squared = 1.231 for 55 degrees of freedom
# Null hypothesis probability = 1.168234e-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] : 17.3131 ( )
R^2/D10^2 : 0.611875 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 130.41 using 59 PHA bins.
# Reduced chi-squared = 2.2879 for 57 degrees of freedom
# Null hypothesis probability = 1.111436e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.716e-08 4.575e-09
25- 50 1.668e-07 1.520e-08
50-150 3.590e-07 4.625e-08
15-150 5.630e-07 4.510e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 35.5564 (-2.39519 2.39493)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.27 using 59 PHA bins.
# Reduced chi-squared = 1.461 for 57 degrees of freedom
# Null hypothesis probability = 1.320939e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.853e-08 6.540e-09
25- 50 1.703e-07 1.475e-08
50-150 3.735e-07 8.095e-08
15-150 6.323e-07 9.890e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.66000 (-1.58454 1.97579)
R1^2/D10^2 : 6.28038 (-3.1846 7.46381)
kT2 [keV] : 32.4720 (-6.64416 13.8944)
R2^2/D10^2 : 6.10901E-02 (-0.0403902 0.0714549)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.01 using 59 PHA bins.
# Reduced chi-squared = 1.291 for 55 degrees of freedom
# Null hypothesis probability = 7.196495e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.398e-08 2.047e-08
25- 50 1.654e-07 3.755e-08
50-150 4.624e-07 1.458e-07
15-150 7.017e-07 1.854e-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: 1.69947 ( -0.116053 0.117479 )
Norm@50keV : 1.76139E-02 ( -0.00119792 0.00118968 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.16 using 59 PHA bins.
# Reduced chi-squared = 0.9676 for 57 degrees of freedom
# Null hypothesis probability = 5.446038e-01
Photon flux (15-150 keV) in 8.128 sec: 2.33889 ( -0.155531 0.155881 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3256e-06 ( -9.42718e-08 9.47814e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70010 ( -0.118028 0.116816 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 1.76302E-02 ( -0.00653745 0.010737 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.16 using 59 PHA bins.
# Reduced chi-squared = 0.9850 for 56 degrees of freedom
# Null hypothesis probability = 5.067323e-01
Photon flux (15-150 keV) in 8.128 sec: 2.33875 ( -0.1545 0.15501 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32426e-06 ( -9.7853e-08 9.5569e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.93793 ( -4.93793 -4.93793 )
beta : -1.75676 ( -0.132771 0.127975 )
Epeak [keV] : 22.2046 ( -6.23111 3.57829 )
Norm@50keV : 4175.03 ( -266.603 1.15479e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.83 using 59 PHA bins.
# Reduced chi-squared = 0.9605 for 55 degrees of freedom
# Null hypothesis probability = 5.580145e-01
Photon flux (15-150 keV) in 8.128 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) = 3.59e-07
S(50-100 keV) = 4.42e-07
T90 vs. Hardness ratio plot
T90 = 7.14399993419647 sec.
Hardness ratio (energy fluence ratio) = 1.2312
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.14287
Count Ratio (50-100 keV) / (15-25 keV) = 0.847715
Mask shadow pattern
IMX = 4.856386814430063E-01, IMY = 7.261623316437079E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-8.847400 -0.804000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3372 35.2871 3.6 22.7 -169.3 0.0870 3.2 6.8 Her X-1
288.9072 10.9705 3.8 37.9 110.7 0.2657 3.0 6.6 GRS 1915+105
299.6620 35.2103 1.3 19.6 69.2 0.2599 8.6 3.6 Cyg X-1
308.2726 40.8720 7.6 21.5 44.4 0.0478 1.5 8.8 Cyg X-3
325.9911 38.3361 9.5 34.6 34.4 0.0520 1.2 8.5 Cyg X-2
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.804000 7.324000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2960 35.3979 4.2 22.6 -169.1 -0.1196 -2.7 8.6 Her X-1
288.7987 11.1096 12.9 37.7 110.8 -0.1120 -0.9 9.8 GRS 1915+105
299.4060 35.2989 20.5 19.4 69.4 0.0260 0.6 10.8 Cyg X-1
307.8938 41.0323 7.2 21.2 44.4 0.0732 1.6 10.9 Cyg X-3
326.3543 38.3463 34.0 34.8 34.1 0.0225 0.3 8.7 Cyg X-2
343.7394 30.3914 2.7 51.1 31.3 0.9062 4.3 ------ UNKNOWN
355.7444 57.4601 2.5 44.5 -6.3 0.3147 4.6 ------ UNKNOWN
349.1115 73.6778 2.2 38.8 -29.6 0.3507 5.3 ------ UNKNOWN
250.0376 62.9303 2.3 22.1 -91.2 0.2519 5.0 ------ UNKNOWN
225.0935 88.5716 0.6 41.1 -56.2 2.3870 20.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
67.552600 962.917100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5449 35.3278 5.3 53.4 157.8 5.8654 2.2 4.4 Her X-1
340.0399 50.4534 3.0 40.1 71.2 7.9336 3.8 ------ UNKNOWN
320.6169 57.9260 2.7 32.2 89.9 4.1183 4.2 ------ UNKNOWN
47.6820 36.0760 3.9 55.3 5.1 6.4275 3.0 ------ UNKNOWN
Plot creation:
Sun May 31 03:10:55 EDT 2015