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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
290.0369 76.9561 0.0079 33.5607 -89.8446 2.1660680 24.229 TRIG_00429969
Foreground time interval of the image:
-4.812 12.589 (delta_t = 17.401 [sec])
Background time interval of the image:
-239.512 -4.812 (delta_t = 234.700 [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 1.024000
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 1.024000
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 1.024000
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)
The mask-weighted light curves based on cleaned DPHs
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 -4.812 sec. to 225.256 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82004 ( -0.0581852 0.0585734 )
Norm@50keV : 3.08860E-03 ( -9.10623e-05 9.06612e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.93 using 59 PHA bins.
# Reduced chi-squared = 0.9286 for 57 degrees of freedom
# Null hypothesis probability = 6.283554e-01
Photon flux (15-150 keV) in 230.1 sec: 0.428954 ( -0.0133876 0.0134456 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.53854e-06 ( -1.95273e-07 1.9607e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.812 sec. to 225.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81916 ( -0.159541 0.217825 )
Epeak [keV] : 1.00000E+04 ( )
Norm@50keV : 3.09199E-03 ( -9.13159e-05 8.64675e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.94 using 59 PHA bins.
# Reduced chi-squared = 0.9454 for 56 degrees of freedom
# Null hypothesis probability = 5.914237e-01
Photon flux (15-150 keV) in 230.1 sec: 0.428696 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.53735e-06 ( -1.87969e-07 1.92203e-07 ) ergs/cm2
Band function
Time interval is from -4.812 sec. to 225.256 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.456318 ( 1.25416 1.25416 )
beta : -1.83402 ( -0.072869 0.0612868 )
Epeak [keV] : 24.0761 ( -29.6683 -29.6683 )
Norm@50keV : 0.191249 ( -0.19097 576.115 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.17 using 59 PHA bins.
# Reduced chi-squared = 0.9485 for 55 degrees of freedom
# Null hypothesis probability = 5.836169e-01
Photon flux (15-150 keV) in 230.1 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] : 13.2441 ( )
R^2/D10^2 : 6.53838E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 377.62 using 59 PHA bins.
# Reduced chi-squared = 6.6250 for 57 degrees of freedom
# Null hypothesis probability = 7.942884e-49
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.594e-07 3.049e-08
25- 50 1.966e-06 6.351e-08
50-150 2.203e-06 1.423e-07
15-150 4.728e-06 1.576e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 119.571 (-21.1282 17.4368)
Norm : 1.72410 (-0.0646103 0.107969)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.52 using 59 PHA bins.
# Reduced chi-squared = 1.272 for 57 degrees of freedom
# Null hypothesis probability = 8.068597e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.033e-06 6.431e-08
25- 50 1.848e-06 8.790e-08
50-150 3.292e-06 7.777e-07
15-150 6.173e-06 7.961e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.13045 (-0.571009 0.625682)
R1^2/D10^2 : 0.851836 (-0.265705 0.411976)
kT2 [keV] : 23.7564 (-2.21676 2.85781)
R2^2/D10^2 : 6.13642E-03 (-0.00210647 0.0027589)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.98 using 59 PHA bins.
# Reduced chi-squared = 1.163 for 55 degrees of freedom
# Null hypothesis probability = 1.903783e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.151e-06 1.004e-07
25- 50 1.839e-06 1.016e-07
50-150 3.409e-06 2.646e-07
15-150 6.399e-06 3.590e-07
Peak spectrum fit
Power-law model
Time interval is from 132.408 sec. to 133.408 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35731 ( -0.110029 0.110395 )
Norm@50keV : 1.87992E-02 ( -0.00120884 0.00120366 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.53 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 57 degrees of freedom
# Null hypothesis probability = 4.188469e-01
Photon flux (15-150 keV) in 1 sec: 2.26820 ( -0.144271 0.144348 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83309e-07 ( -1.33269e-08 1.34216e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 132.408 sec. to 133.408 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13407 ( -0.463186 0.279029 )
Epeak [keV] : 195.175 ( -195.186 -195.186 )
Norm@50keV : 2.43818E-02 ( -0.00653031 0.0168671 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.73 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 56 degrees of freedom
# Null hypothesis probability = 4.110003e-01
Photon flux (15-150 keV) in 1 sec: 2.24654 ( -0.15026 0.14977 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.80032e-07 ( -1.496e-08 1.4819e-08 ) ergs/cm2
Band function
Time interval is from 132.408 sec. to 133.408 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.878833 ( 0.879154 0.879154 )
beta : -1.52873 ( 1.52971 0.244594 )
Epeak [keV] : 102.280 ( -102.783 -102.783 )
Norm@50keV : 3.43780E-02 ( -0.0152706 814.258 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.95 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 55 degrees of freedom
# Null hypothesis probability = 4.022875e-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] : 15.7602 (-1.26965 1.40485)
R^2/D10^2 : 0.221817 (-0.0560774 0.0736777)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 108.63 using 59 PHA bins.
# Reduced chi-squared = 1.9058 for 57 degrees of freedom
# Null hypothesis probability = 4.522150e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.143e-08 1.432e-09
25- 50 4.747e-08 3.840e-09
50-150 8.193e-08 1.065e-08
15-150 1.408e-07 1.285e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 9.25318 (-0.590123 0.590128)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.72 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 57 degrees of freedom
# Null hypothesis probability = 2.004993e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.318e-08 1.555e-09
25- 50 4.458e-08 4.030e-09
50-150 9.778e-08 2.484e-08
15-150 1.655e-07 3.240e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.36282 (-2.30878 2.56977)
R1^2/D10^2 : 1.24057 (-0.645358 1.53889)
kT2 [keV] : 32.4354 (-9.4511 37.0012)
R2^2/D10^2 : 1.50149E-02 (-0.0130328 0.035682)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.77 using 59 PHA bins.
# Reduced chi-squared = 1.105 for 55 degrees of freedom
# Null hypothesis probability = 2.758247e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.854e-08 3.970e-09
25- 50 4.551e-08 1.016e-08
50-150 1.167e-07 5.296e-08
15-150 1.807e-07 6.159e-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: 1.49037 ( -0.0989238 0.0993594 )
Norm@50keV : 8.53432E-03 ( -0.00051303 0.00051212 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.43 using 59 PHA bins.
# Reduced chi-squared = 1.393 for 57 degrees of freedom
# Null hypothesis probability = 2.646608e-02
Photon flux (15-150 keV) in 17.4 sec: 1.06268 ( -0.064613 0.0646947 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41096e-06 ( -9.18153e-08 9.22482e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.661901 ( -0.466934 0.421514 )
Epeak [keV] : 82.2200 ( -13.7481 33.4239 )
Norm@50keV : 2.19981E-02 ( -0.00823619 0.0148786 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.09 using 59 PHA bins.
# Reduced chi-squared = 1.198 for 56 degrees of freedom
# Null hypothesis probability = 1.473175e-01
Photon flux (15-150 keV) in 17.4 sec: 1.02512 ( -0.067284 0.0673 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33884e-06 ( -9.88111e-08 9.93731e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.661697 ( -0.332171 0.563343 )
beta : -10.0000 ( 10 5.32907e-15 )
Epeak [keV] : 82.1976 ( -13.7192 33.4279 )
Norm@50keV : 2.20031E-02 ( -0.00823399 0.0148906 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.09 using 59 PHA bins.
# Reduced chi-squared = 1.220 for 55 degrees of freedom
# Null hypothesis probability = 1.270606e-01
Photon flux (15-150 keV) in 17.4 sec: 1.03308 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34028e-06 ( -1.34016e-06 -1.00887e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.85e-06
S(50-100 keV) = 2.10e-06
T90 vs. Hardness ratio plot
T90 = 173.695999920368 sec.
Hardness ratio (energy fluence ratio) = 1.13514
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.08757
Count Ratio (50-100 keV) / (15-25 keV) = 0.673829
Mask shadow pattern
IMX = 1.799276477557046E-03, IMY = 6.634084591647635E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-239.512000 -4.812000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2453 35.3246 6.0 41.3 -166.1 -0.5375 -1.9 10.4 Her X-1
288.7811 10.9822 1.8 37.0 129.3 2.3459 6.4 2.4 GRS 1915+105
299.6042 35.1932 1.3 11.0 134.8 1.3851 8.9 0.8 Cyg X-1
308.1168 40.9554 1.0 3.3 92.2 1.7907 11.3 0.3 Cyg X-3
326.1105 38.1791 5.8 15.0 24.5 0.3139 2.0 9.0 Cyg X-2
355.2530 23.6718 2.2 43.7 19.3 1.6050 5.2 ------ UNKNOWN
249.6695 16.8112 2.8 55.6 177.1 3.1543 4.1 ------ UNKNOWN
322.3736 85.1195 1.8 41.1 -80.8 4.9496 6.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-4.812000 12.588600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4577 35.3433 75.9 41.2 -166.2 -0.0088 -0.2 0.1 Her X-1
288.8136 10.9414 617.2 37.0 129.2 0.0016 0.0 0.9 GRS 1915+105
299.5655 35.3493 7.0 10.8 135.3 -0.0689 -1.7 8.9 Cyg X-1
307.9186 41.0858 9.9 3.1 94.8 -0.0503 -1.2 11.8 Cyg X-3
325.9985 38.4653 3.9 14.8 23.7 0.1182 3.0 11.9 Cyg X-2
345.7868 22.8302 2.1 37.7 29.1 0.3770 5.4 ------ UNKNOWN
307.6508 27.2070 2.6 17.0 97.5 0.2088 4.5 ------ UNKNOWN
247.9353 19.4221 2.1 55.1 -179.2 0.8354 5.4 ------ UNKNOWN
346.1072 49.3254 2.2 26.5 -17.6 0.2251 5.2 ------ UNKNOWN
290.0369 76.9561 0.5 33.6 -89.8 2.1659 24.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
67.188590 962.577800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5498 35.4591 11.4 44.4 146.7 -1.3659 -1.0 8.3 Her X-1
308.0843 40.9593 2.4 36.8 81.1 7.6307 4.8 1.2 Cyg X-3
326.1620 38.3020 62.1 41.7 60.0 -0.3186 -0.2 1.3 Cyg X-2
13.7517 48.9977 3.0 41.3 5.3 2.6982 3.8 ------ UNKNOWN
290.0246 76.9472 0.6 0.0 -132.0 9.5330 19.1 ------ UNKNOWN
19.4178 65.2541 1.8 27.6 -11.6 3.4470 6.6 ------ UNKNOWN
187.3517 45.7875 2.7 48.4 -141.3 5.6971 4.2 ------ UNKNOWN
116.7763 61.9160 2.7 41.1 -80.7 9.5928 4.3 ------ UNKNOWN
Plot creation:
Sun May 31 00:47:09 EDT 2015