Special notes of this burst
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
289.2450 -17.1145 0.0174 24.5648 -106.0921 1.3105564 11.067 TRIG_00434360
Foreground time interval of the image:
-2.212 66.224 (delta_t = 68.436 [sec])
Background time interval of the image:
-235.867 -2.212 (delta_t = 233.655 [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 4.096000
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 4.096000
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 4.096000
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 -2.212 sec. to 66.224 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.61438 ( -0.218264 0.223454 )
Norm@50keV : 1.33349E-03 ( -0.000166006 0.000162573 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.19 using 59 PHA bins.
# Reduced chi-squared = 1.214 for 57 degrees of freedom
# Null hypothesis probability = 1.290772e-01
Photon flux (15-150 keV) in 68.44 sec: 0.172132 ( -0.019717 0.0197492 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.52051e-07 ( -1.14092e-07 1.15881e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.212 sec. to 66.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62612 ( -0.232881 0.212921 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 1.32549E-03 ( -0.00133272 0.000703662 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.22 using 59 PHA bins.
# Reduced chi-squared = 1.236 for 56 degrees of freedom
# Null hypothesis probability = 1.104083e-01
Photon flux (15-150 keV) in 68.44 sec: 0.172471 ( -0.019951 0.019455 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.53885e-07 ( -1.15588e-07 1.08635e-07 ) ergs/cm2
Band function
Time interval is from -2.212 sec. to 66.224 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.29404 ( 1.29427 1.29427 )
beta : -1.61390 ( -0.920768 0.218285 )
Epeak [keV] : 25.6242 ( -25.6112 -25.6112 )
Norm@50keV : 2.92681E-03 ( -0.00175535 4.66443 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.19 using 59 PHA bins.
# Reduced chi-squared = 1.258 for 55 degrees of freedom
# Null hypothesis probability = 9.442130e-02
Photon flux (15-150 keV) in 68.44 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] : 13.3934 (-2.47198 3.19283)
R^2/D10^2 : 2.68269E-02 (-0.0139784 0.028922)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 104.57 using 59 PHA bins.
# Reduced chi-squared = 1.8345 for 57 degrees of freedom
# Null hypothesis probability = 1.252375e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.979e-08 1.609e-08
25- 50 2.481e-07 4.692e-08
50-150 2.862e-07 7.850e-08
15-150 6.041e-07 9.996e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.165 (-94.9034 -199.165)
Norm : 0.691168 (-0.0784815 0.0958262)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.70 using 59 PHA bins.
# Reduced chi-squared = 1.258 for 57 degrees of freedom
# Null hypothesis probability = 9.101318e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.178e-07 6.550e-08
25- 50 2.266e-07 1.228e-07
50-150 4.968e-07 2.697e-07
15-150 8.412e-07 4.596e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.77535 (-1.4372 1.77611)
R1^2/D10^2 : 0.448338 (-0.286608 0.674041)
kT2 [keV] : 30.5821 (-8.73032 22.2522)
R2^2/D10^2 : 1.35506E-03 (-0.00106217 0.00275517)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.76 using 59 PHA bins.
# Reduced chi-squared = 1.232 for 55 degrees of freedom
# Null hypothesis probability = 1.159136e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.419e-07 6.484e-08
25- 50 2.011e-07 7.509e-08
50-150 5.557e-07 3.074e-07
15-150 8.987e-07 3.503e-07
Peak spectrum fit
Power-law model
Time interval is from 3.220 sec. to 4.220 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66119 ( -0.556308 0.595394 )
Norm@50keV : 4.65190E-03 ( -0.00154892 0.00142265 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.17 using 59 PHA bins.
# Reduced chi-squared = 1.178 for 57 degrees of freedom
# Null hypothesis probability = 1.678871e-01
Photon flux (15-150 keV) in 1 sec: 0.609686 ( -0.167266 0.16734 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.32147e-08 ( -1.44278e-08 1.51027e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.220 sec. to 4.220 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.19374 ( )
Epeak [keV] : 72.8264 ( )
Norm@50keV : 2.31534E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.14 using 59 PHA bins.
# Reduced chi-squared = 1.181 for 56 degrees of freedom
# Null hypothesis probability = 1.664983e-01
Photon flux (15-150 keV) in 1 sec: 0.609853 ( -0.166733 0.166836 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.28192e-08 ( -1.404e-08 1.47173e-08 ) ergs/cm2
Band function
Time interval is from 3.220 sec. to 4.220 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.41735 ( 1.41736 1.41736 )
beta : -1.66119 ( 1.66124 0.556298 )
Epeak [keV] : 9.53519 ( -9.53748 -9.53748 )
Norm@50keV : 1.09963E-02 ( -0.0109966 0.139124 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.17 using 59 PHA bins.
# Reduced chi-squared = 1.221 for 55 degrees of freedom
# Null hypothesis probability = 1.257489e-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] : 9.93089 (-2.96183 4.85321)
R^2/D10^2 : 0.284268 (-0.283386 0.792253)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.34 using 59 PHA bins.
# Reduced chi-squared = 1.269 for 57 degrees of freedom
# Null hypothesis probability = 8.281127e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.696e-09 3.377e-09
25- 50 1.402e-08 8.545e-09
50-150 7.173e-09 5.495e-09
15-150 2.689e-08 1.621e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 174.979 (-176.146 -176.146)
Norm : 2.45834 (-0.691019 1.3216)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.04 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 57 degrees of freedom
# Null hypothesis probability = 1.501644e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.219e-09 3.754e-09
25- 50 1.177e-08 6.895e-09
50-150 2.468e-08 1.519e-08
15-150 4.267e-08 2.555e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.67682 (-2.25176 2.53533)
R1^2/D10^2 : 0.657519 (-0.488491 0.565901)
kT2 [keV] : 198.127 (-198.453 -198.453)
R2^2/D10^2 : 1.09620E-04 (-5.59103e-05 0.00193482)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.39 using 59 PHA bins.
# Reduced chi-squared = 1.152 for 55 degrees of freedom
# Null hypothesis probability = 2.046673e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.923e-09 4.346e-09
25- 50 1.222e-08 7.760e-09
50-150 3.131e-08 5.820e-09
15-150 5.046e-08 1.632e-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: 1.61438 ( -0.218264 0.223454 )
Norm@50keV : 1.33349E-03 ( -0.000166006 0.000162573 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.19 using 59 PHA bins.
# Reduced chi-squared = 1.214 for 57 degrees of freedom
# Null hypothesis probability = 1.290772e-01
Photon flux (15-150 keV) in 68.44 sec: 0.172132 ( -0.019717 0.0197492 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.52051e-07 ( -1.14092e-07 1.15881e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62612 ( -0.232881 0.212921 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 1.32549E-03 ( -0.00133272 0.000703662 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.22 using 59 PHA bins.
# Reduced chi-squared = 1.236 for 56 degrees of freedom
# Null hypothesis probability = 1.104083e-01
Photon flux (15-150 keV) in 68.44 sec: 0.172471 ( -0.019951 0.019455 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.53885e-07 ( -1.15588e-07 1.08635e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.29404 ( 1.29427 1.29427 )
beta : -1.61390 ( -0.920768 0.218285 )
Epeak [keV] : 25.6242 ( -25.6112 -25.6112 )
Norm@50keV : 2.92681E-03 ( -0.00175535 4.66443 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.19 using 59 PHA bins.
# Reduced chi-squared = 1.258 for 55 degrees of freedom
# Null hypothesis probability = 9.442130e-02
Photon flux (15-150 keV) in 68.44 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) = 2.22e-07
S(50-100 keV) = 2.90e-07
T90 vs. Hardness ratio plot
T90 = 63.8159999251366 sec.
Hardness ratio (energy fluence ratio) = 1.30631
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.960096
Count Ratio (50-100 keV) / (15-25 keV) = 0.775037
Mask shadow pattern
IMX = -1.266979308608149E-01, IMY = 4.391831519623013E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
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:
-235.867400 -2.212000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
274.0272 -14.0136 4.3 37.7 -92.0 1.7341 2.7 1.9 GX 17+2
276.0136 -30.3329 19.8 41.5 -117.2 0.3574 0.6 5.0 H1820-303
285.2240 -25.0449 0.0 31.8 -116.8 0.2127 0.8 12.7 HT1900.1-2455
288.7660 10.9472 0.7 27.9 -40.0 3.4055 16.6 1.9 GRS 1915+105
299.5792 35.2159 1.1 42.3 -0.7 3.4038 10.9 1.0 Cyg X-1
308.1339 40.9763 2.4 46.6 10.4 1.8993 4.8 1.8 Cyg X-3
326.2122 38.3019 6.8 46.0 30.0 -0.8405 -1.7 2.2 Cyg X-2
336.5629 -12.4908 2.8 25.8 121.1 1.0725 4.2 ------ UNKNOWN
324.4043 -8.7494 2.6 13.3 118.4 0.8089 4.5 ------ UNKNOWN
290.9330 -14.5350 2.2 22.0 -101.8 1.0128 5.3 ------ UNKNOWN
284.3918 -58.4227 3.1 56.8 -149.7 4.6069 3.8 ------ UNKNOWN
279.6944 -52.0846 2.7 53.4 -142.5 4.7737 4.3 ------ UNKNOWN
267.8220 12.6174 2.6 47.0 -53.2 3.5916 4.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-2.212000 66.224000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
273.9195 -14.1654 9.3 37.9 -92.2 -0.3408 -1.2 9.2 GX 17+2
275.8492 -30.4828 6.1 41.7 -117.3 0.5206 1.9 8.0 H1820-303
285.0344 -24.9185 284.8 31.8 -116.4 0.0059 0.0 0.1 HT1900.1-2455
288.9059 11.1312 0.0 27.9 -39.5 0.2790 2.6 12.8 GRS 1915+105
299.4669 35.3274 5.3 42.4 -0.7 -0.3202 -2.2 9.7 Cyg X-1
308.2100 41.0543 15.5 46.7 10.4 0.1643 0.7 7.6 Cyg X-3
326.1773 38.2934 22.6 46.0 29.9 0.1293 0.5 1.7 Cyg X-2
289.2450 -17.1145 1.0 24.6 -106.1 1.3100 11.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
406.132600 962.118400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
326.1441 38.3176 3.1 53.9 170.9 4.7857 3.7 1.3 Cyg X-2
5.3317 10.4421 2.2 24.3 112.4 1.8464 5.2 ------ UNKNOWN
335.1627 42.4695 2.9 47.3 176.7 2.5543 3.9 ------ UNKNOWN
47.7265 -0.5283 3.1 30.6 5.8 1.2874 3.7 ------ UNKNOWN
1.6085 65.9790 2.9 46.3 -145.0 2.8900 4.0 ------ UNKNOWN
78.7970 24.0798 5.7 47.0 -53.3 3.2475 2.1 ------ UNKNOWN
70.9249 42.3792 2.7 41.1 -80.0 6.1181 4.3 ------ UNKNOWN
30.6569 70.8547 2.7 48.2 -129.4 6.1898 4.3 ------ UNKNOWN
Plot creation:
Sat May 30 23:50:01 EDT 2015