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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
183.5045 -48.7286 0.0222 15.1478 133.3729 0.4699268 8.734 TRIG_00345777
Foreground time interval of the image:
16.596 45.356 (delta_t = 28.760 [sec])
Background time interval of the image:
-239.000 16.596 (delta_t = 255.596 [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 64.000000
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 64.000000
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 64.000000
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 16.596 sec. to 45.356 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.33531 ( -0.317951 0.362588 )
Norm@50keV : 7.96745E-04 ( -0.000210218 0.000207722 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.46 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 57 degrees of freedom
# Null hypothesis probability = 4.216588e-01
Photon flux (15-150 keV) in 28.76 sec: 0.142026 ( -0.0234121 0.0234258 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.20459e-07 ( -4.60399e-08 4.86309e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 16.596 sec. to 45.356 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08930 ( -1.87871 0.913703 )
Epeak [keV] : 26.6689 ( )
Norm@50keV : 4.83965E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.01 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 56 degrees of freedom
# Null hypothesis probability = 4.746051e-01
Photon flux (15-150 keV) in 28.76 sec: 0.138710 ( -0.023135 0.023342 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9939e-07 ( -4.23281e-08 5.05149e-08 ) ergs/cm2
Band function
Time interval is from 16.596 sec. to 45.356 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.09545 ( -3.61221 1.67808 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 26.6387 ( -16.1608 12.3134 )
Norm@50keV : 4.79271E-03 ( -0.00479272 0.0753192 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.01 using 59 PHA bins.
# Reduced chi-squared = 1.018 for 55 degrees of freedom
# Null hypothesis probability = 4.368453e-01
Photon flux (15-150 keV) in 28.76 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.99258e-07 ( -1.99057e-07 -4.24138e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.04943 (-1.42818 1.67115)
R^2/D10^2 : 0.155933 (-0.0826285 0.185422)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.93 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 57 degrees of freedom
# Null hypothesis probability = 3.365840e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.278e-08 1.462e-08
25- 50 9.337e-08 2.389e-08
50-150 2.502e-08 1.223e-08
15-150 1.712e-07 4.661e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 38.2314 (-12.6128 22.182)
Norm : 0.961007 (-0.258989 0.380972)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.09 using 59 PHA bins.
# Reduced chi-squared = 0.9841 for 57 degrees of freedom
# Null hypothesis probability = 5.090690e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.248e-08 1.441e-08
25- 50 8.057e-08 2.069e-08
50-150 5.928e-08 3.539e-08
15-150 2.023e-07 5.474e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.75173 (-2.0257 2.72255)
R1^2/D10^2 : 2.05396 (-1.79146 189.152)
kT2 [keV] : 11.3976 (-3.12487 7.18816)
R2^2/D10^2 : 2.98314E-02 (-0.0270653 0.0960757)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.17 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 55 degrees of freedom
# Null hypothesis probability = 4.681897e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.248e-08 3.220e-08
25- 50 8.099e-08 4.272e-08
50-150 5.231e-08 3.329e-08
15-150 1.958e-07 1.008e-07
Peak spectrum fit
Power-law model
Time interval is from 16.592 sec. to 17.592 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.18589 ( -0.612254 0.806212 )
Norm@50keV : 2.03427E-03 ( -0.00110723 0.001044 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.87 using 59 PHA bins.
# Reduced chi-squared = 0.6819 for 57 degrees of freedom
# Null hypothesis probability = 9.683385e-01
Photon flux (15-150 keV) in 1 sec: 0.334298 ( -0.120862 0.12108 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.90867e-08 ( -8.32032e-09 9.21806e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 16.592 sec. to 17.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.123736 ( -5.66856 2.056 )
Epeak [keV] : 35.4978 ( )
Norm@50keV : 3.59039E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.30 using 59 PHA bins.
# Reduced chi-squared = 0.6661 for 56 degrees of freedom
# Null hypothesis probability = 9.743326e-01
Photon flux (15-150 keV) in 1 sec: 0.327002 ( -0.118349 0.118829 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.7164e-08 ( -6.8103e-09 8.7003e-09 ) ergs/cm2
Band function
Time interval is from 16.592 sec. to 17.592 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.195973 ( -1.80512 0.153564 )
beta : -9.37167 ( 9.37167 19.3716 )
Epeak [keV] : 35.5137 ( -17.2082 133.289 )
Norm@50keV : 3.23264E-02 ( -0.0428934 1.12738e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.31 using 59 PHA bins.
# Reduced chi-squared = 0.6784 for 55 degrees of freedom
# Null hypothesis probability = 9.675450e-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] : 9.49435 (-2.99814 3.91487)
R^2/D10^2 : 0.206973 (-0.206973 0.669728)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.65 using 59 PHA bins.
# Reduced chi-squared = 0.6605 for 57 degrees of freedom
# Null hypothesis probability = 9.776157e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.725e-09 2.343e-09
25- 50 8.590e-09 5.540e-09
50-150 3.850e-09 3.256e-09
15-150 1.617e-08 1.060e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 46.2071 (-25.7152 100.988)
Norm : 2.04543 (-0.930779 1.82974)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.79 using 59 PHA bins.
# Reduced chi-squared = 0.6631 for 57 degrees of freedom
# Null hypothesis probability = 9.766320e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.905e-09 3.126e-09
25- 50 6.842e-09 4.317e-09
50-150 6.154e-09 4.905e-09
15-150 1.790e-08 1.208e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.94161 (-2.9486 -2.9486)
R1^2/D10^2 : 10.6352 (-10.5712 -10.5712)
kT2 [keV] : 10.8647 (-3.89752 -10.8681)
R2^2/D10^2 : 0.109359 (-0.1092 0.561371)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.83 using 59 PHA bins.
# Reduced chi-squared = 0.6696 for 55 degrees of freedom
# Null hypothesis probability = 9.716638e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.448e-09 2.128e-09
25- 50 7.725e-09 4.697e-09
50-150 4.944e-09 3.517e-09
15-150 1.712e-08 9.900e-09
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: 2.33531 ( -0.317951 0.362588 )
Norm@50keV : 7.96745E-04 ( -0.000210218 0.000207722 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.46 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 57 degrees of freedom
# Null hypothesis probability = 4.216588e-01
Photon flux (15-150 keV) in 28.76 sec: 0.142026 ( -0.0234121 0.0234258 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.20459e-07 ( -4.60399e-08 4.86309e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08930 ( -1.87871 0.913703 )
Epeak [keV] : 26.6689 ( )
Norm@50keV : 4.83965E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.01 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 56 degrees of freedom
# Null hypothesis probability = 4.746051e-01
Photon flux (15-150 keV) in 28.76 sec: 0.138710 ( -0.023135 0.023342 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9939e-07 ( -4.23281e-08 5.05149e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.09545 ( -3.61221 1.67807 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 26.6387 ( -16.1609 12.3133 )
Norm@50keV : 4.79271E-03 ( -0.00479272 0.0753192 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.01 using 59 PHA bins.
# Reduced chi-squared = 1.018 for 55 degrees of freedom
# Null hypothesis probability = 4.368453e-01
Photon flux (15-150 keV) in 28.76 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.99258e-07 ( -1.99057e-07 -4.24138e-08 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 7.16e-08
S(50-100 keV) = 5.68e-08
T90 vs. Hardness ratio plot
T90 = 25.0959999859333 sec.
Hardness ratio (energy fluence ratio) = 0.793296
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.634956
Count Ratio (50-100 keV) / (15-25 keV) = 0.221965
Mask shadow pattern
IMX = -1.859131598750296E-01, IMY = -1.967837481636095E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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:
-239.000000 16.596000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5197 -40.5701 1.1 29.8 37.4 2.8002 10.9 1.0 Vela X-1
170.3605 -60.6176 1.3 1.3 101.0 1.6112 9.1 1.4 Cen X-3
186.6272 -62.7696 0.5 7.6 -158.6 4.4806 21.9 0.8 GX 301-2
255.9050 -37.7924 3.7 55.3 -155.4 2.2036 3.1 5.0 4U 1700-377
256.5776 -36.6159 0.0 56.6 -155.7 0.8626 0.9 13.4 GX 349+2
264.5853 -44.4697 27.5 53.7 -144.1 0.5616 0.4 6.9 4U 1735-44
54.4749 -55.7975 3.9 52.1 -42.1 3.4913 3.0 ------ UNKNOWN
346.3524 -77.0459 3.7 41.0 -83.4 2.6201 3.1 ------ UNKNOWN
299.2591 -72.0516 4.0 41.6 -103.2 2.6089 2.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
16.596000 45.356000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4966 -40.4914 3.2 29.9 37.5 -0.2918 -3.6 4.1 Vela X-1
170.0103 -60.6340 4.1 1.3 93.5 -0.1468 -2.8 9.0 Cen X-3
186.4065 -62.6872 4.6 7.5 -159.2 0.1243 2.5 8.5 GX 301-2
256.0025 -37.8259 4.4 55.4 -155.3 0.5478 2.6 1.3 4U 1700-377
256.3326 -36.4883 6.8 56.6 -156.0 0.4039 1.7 6.3 GX 349+2
264.7404 -44.4489 39.6 53.7 -144.0 -0.0770 -0.3 0.1 4U 1735-44
183.5044 -48.7287 1.3 15.1 133.4 0.4693 8.7 ------ UNKNOWN
129.8112 -48.8497 2.4 25.8 19.5 0.3043 4.9 ------ UNKNOWN
251.2813 -43.3674 2.9 48.8 -154.8 0.4789 3.9 ------ UNKNOWN
259.2209 -35.1773 2.1 59.0 -154.5 1.9919 5.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
110.900600 673.000610
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5532 -40.5407 1.0 34.5 13.2 4.8082 11.2 1.4 Vela X-1
170.3621 -60.6217 1.1 14.0 -44.8 3.4424 10.9 1.4 Cen X-3
186.6437 -62.7663 0.4 14.0 -78.2 9.9555 30.6 0.4 GX 301-2
255.9606 -37.8494 1.4 51.8 -145.7 8.2832 8.5 1.3 4U 1700-377
256.5325 -36.4322 8.0 53.0 -146.8 1.6898 1.4 4.7 GX 349+2
132.6568 -32.2269 3.5 41.2 22.1 1.9105 3.3 ------ UNKNOWN
126.7688 -42.5779 3.0 39.2 4.8 1.9368 3.9 ------ UNKNOWN
149.3371 -53.5896 3.6 21.7 -7.9 0.9935 3.2 ------ UNKNOWN
242.8682 -17.2189 3.2 57.1 -174.1 5.0713 3.6 ------ UNKNOWN
170.0914 -61.9205 2.0 15.1 -47.5 1.7968 5.7 ------ UNKNOWN
239.4215 -25.4241 2.2 49.0 -169.8 3.2107 5.2 ------ UNKNOWN
242.7998 -30.5108 2.8 47.8 -162.1 2.7449 4.1 ------ UNKNOWN
94.6153 -59.0313 3.3 49.3 -29.6 2.4970 3.5 ------ UNKNOWN
84.1172 -51.2082 3.7 58.7 -26.0 7.2855 3.1 ------ UNKNOWN
78.3012 -65.7411 4.8 52.0 -42.1 4.9210 2.4 ------ UNKNOWN
261.7299 -57.9087 3.0 44.8 -119.9 5.3653 3.9 ------ UNKNOWN
268.6422 -82.6462 3.9 41.1 -83.5 4.5555 3.0 ------ UNKNOWN
Plot creation:
Sun May 31 04:44:35 EDT 2015