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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
287.6671 -18.8667 0.0181 39.6253 -6.5243 0.1762158 10.648 TRIG_00323870
Foreground time interval of the image:
0.040 1.128 (delta_t = 1.088 [sec])
Background time interval of the image:
-749.147 -701.951 (delta_t = 47.196 [sec])
-239.048 0.040 (delta_t = 239.088 [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 0.256000
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 0.256000
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 0.256000
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 0.040 sec. to 1.128 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.794886 ( -0.250689 0.232794 )
Norm@50keV : 1.10396E-02 ( -0.00162854 0.00158856 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.30 using 59 PHA bins.
# Reduced chi-squared = 0.8825 for 57 degrees of freedom
# Null hypothesis probability = 7.226038e-01
Photon flux (15-150 keV) in 1.088 sec: 1.26905 ( -0.179082 0.180275 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40663e-07 ( -1.90668e-08 1.9113e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.040 sec. to 1.128 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.626821 ( -1.03686 0.623252 )
Epeak [keV] : 499.274 ( -500.136 -500.136 )
Norm@50keV : 1.29966E-02 ( -0.00309096 0.0207787 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.20 using 59 PHA bins.
# Reduced chi-squared = 0.8964 for 56 degrees of freedom
# Null hypothesis probability = 6.930456e-01
Photon flux (15-150 keV) in 1.088 sec: 1.26276 ( -0.18127 0.18215 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40128e-07 ( -1.96721e-08 1.93729e-08 ) ergs/cm2
Band function
Time interval is from 0.040 sec. to 1.128 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.732639 ( 0.732639 0.732639 )
beta : -0.794892 ( -0.232794 0.250667 )
Epeak [keV] : 15.6074 ( -15.6074 -15.6074 )
Norm@50keV : 1.64507E-02 ( -0.00698771 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.30 using 59 PHA bins.
# Reduced chi-squared = 0.9146 for 55 degrees of freedom
# Null hypothesis probability = 6.544156e-01
Photon flux (15-150 keV) in 1.088 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] : 26.2349 (-4.68402 6.61428)
R^2/D10^2 : 2.79009E-02 (-0.0135686 0.0232666)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.43 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.227845e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.536e-09 1.023e-09
25- 50 2.054e-08 5.881e-09
50-150 1.040e-07 2.488e-08
15-150 1.281e-07 2.870e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 5.22581 (-0.754041 0.753965)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.92 using 59 PHA bins.
# Reduced chi-squared = 1.385 for 57 degrees of freedom
# Null hypothesis probability = 2.891036e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.416e-08 7.926e-09
25- 50 2.724e-08 1.528e-08
50-150 5.975e-08 3.313e-08
15-150 1.012e-07 5.679e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.9498 (-4.76298 6.15529)
R1^2/D10^2 : 0.160526 ( )
kT2 [keV] : 91.2881 (-57.4877 -92.9548)
R2^2/D10^2 : 9.39722E-04 (-0.000638179 0.00499623)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.87 using 59 PHA bins.
#Fit statistic : Chi-Squared = 47.37 using 59 PHA bins.
# Reduced chi-squared = 0.8704 for 55 degrees of freedom
# Reduced chi-squared = 0.8613 for 55 degrees of freedom
# Null hypothesis probability = 7.411581e-01
# Null hypothesis probability = 7.578704e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.924e-09 4.158e-09
25- 50 2.511e-08 1.382e-08
50-150 1.037e-07 5.723e-08
15-150 1.358e-07 6.958e-08
Peak spectrum fit
Power-law model
Time interval is from 0.040 sec. to 1.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.738146 ( -0.272623 0.249928 )
Norm@50keV : 1.06965E-02 ( -0.00172456 0.00167041 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.12 using 59 PHA bins.
# Reduced chi-squared = 0.8617 for 57 degrees of freedom
# Null hypothesis probability = 7.617646e-01
Photon flux (15-150 keV) in 1 sec: 1.23309 ( -0.185473 0.186882 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28367e-07 ( -1.83384e-08 1.83745e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.040 sec. to 1.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.641251 ( -1.09045 0.328106 )
Epeak [keV] : 854.855 ( -880.208 -880.208 )
Norm@50keV : 1.17384E-02 ( -0.00219335 0.0196178 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.09 using 59 PHA bins.
# Reduced chi-squared = 0.8766 for 56 degrees of freedom
# Null hypothesis probability = 7.317923e-01
Photon flux (15-150 keV) in 1 sec: 1.22977 ( -0.18737 0.18861 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28181e-07 ( -1.8728e-08 1.8542e-08 ) ergs/cm2
Band function
Time interval is from 0.040 sec. to 1.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -0.938096 ( -0.435504 0.329859 )
Epeak [keV] : 40.6480 ( -39.3867 13.9288 )
Norm@50keV : 40.8400 ( -5.60651 971916 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.59 using 59 PHA bins.
# Reduced chi-squared = 0.8471 for 55 degrees of freedom
# Null hypothesis probability = 7.830389e-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] : 27.8681 (-5.41154 8.00281)
R^2/D10^2 : 2.29869E-02 (-0.0119027 0.0212839)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.59 using 59 PHA bins.
# Reduced chi-squared = 0.9928 for 57 degrees of freedom
# Null hypothesis probability = 4.904672e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.919e-09 9.395e-10
25- 50 1.744e-08 5.198e-09
50-150 9.813e-08 2.363e-08
15-150 1.185e-07 2.568e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 5.05396 (-0.783744 0.78367)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.01 using 59 PHA bins.
# Reduced chi-squared = 1.369 for 57 degrees of freedom
# Null hypothesis probability = 3.372452e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.258e-08 7.175e-09
25- 50 2.419e-08 1.377e-08
50-150 5.306e-08 2.952e-08
15-150 8.983e-08 5.135e-08
Double BB
R1^2/D10^2 : 0.136162 (-0.0728608 0.344042)
kT2 [keV] : 163.800 (-163.803 -163.803)
R2^2/D10^2 : 3.61492E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.21 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.37 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.34 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 55 degrees of freedom
# Reduced chi-squared = 0.8431 for 55 degrees of freedom
# Reduced chi-squared = 0.8425 for 55 degrees of freedom
# Null hypothesis probability = 4.668134e-01
# Null hypothesis probability = 7.897459e-01
# Null hypothesis probability = 7.907981e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.876e-09 9.685e-10
25- 50 1.724e-08 4.775e-09
50-150 9.803e-08 2.257e-08
15-150 1.181e-07 2.724e-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: 0.794886 ( -0.250689 0.232794 )
Norm@50keV : 1.10396E-02 ( -0.00162854 0.00158856 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.30 using 59 PHA bins.
# Reduced chi-squared = 0.8825 for 57 degrees of freedom
# Null hypothesis probability = 7.226038e-01
Photon flux (15-150 keV) in 1.088 sec: 1.26905 ( -0.179082 0.180275 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40663e-07 ( -1.90668e-08 1.9113e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.626821 ( -1.03686 0.623252 )
Epeak [keV] : 499.274 ( -500.136 -500.136 )
Norm@50keV : 1.29966E-02 ( -0.00309096 0.0207787 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.20 using 59 PHA bins.
# Reduced chi-squared = 0.8964 for 56 degrees of freedom
# Null hypothesis probability = 6.930456e-01
Photon flux (15-150 keV) in 1.088 sec: 1.26276 ( -0.18127 0.18215 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40128e-07 ( -1.96721e-08 1.93729e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.732639 ( 0.732639 0.732639 )
beta : -0.794892 ( -0.232794 0.250667 )
Epeak [keV] : 15.6074 ( -15.6074 -15.6074 )
Norm@50keV : 1.64507E-02 ( -0.00698718 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.30 using 59 PHA bins.
# Reduced chi-squared = 0.9146 for 55 degrees of freedom
# Null hypothesis probability = 6.544156e-01
Photon flux (15-150 keV) in 1.088 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) = 2.26e-08
S(50-100 keV) = 5.21e-08
T90 vs. Hardness ratio plot
T90 = 1.01600003242493 sec.
Hardness ratio (energy fluence ratio) = 2.30531
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 5.42334
Count Ratio (50-100 keV) / (15-25 keV) = 5.62636
Mask shadow pattern
IMX = 8.226525908598192E-01, IMY = 9.408322069180867E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
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:
-749.147400 -701.951500
-239.048000 0.040000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
270.3177 -25.0077 28.7 52.3 -22.9 -0.2000 -0.4 4.7 GX 5-1
270.3433 -25.7713 6.1 52.0 -23.8 0.9280 1.9 2.8 GRS 1758-258
273.9756 -14.0916 6.1 53.5 -8.6 -0.9896 -1.9 3.7 GX 17+2
275.9018 -30.3141 3.7 46.0 -27.7 1.1091 3.2 3.4 H1820-303
285.1834 -24.9763 5.4 39.5 -16.8 0.5618 2.1 8.7 HT1900.1-2455
0.3101 -52.9875 2.3 31.8 -138.9 1.1531 5.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.040000 1.128000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
270.3121 -25.2938 0.0 52.2 -23.3 -0.0543 -1.8 13.0 GX 5-1
270.4466 -25.7473 4.9 51.9 -23.7 0.0684 2.4 7.8 GRS 1758-258
273.9731 -14.0226 14.2 53.5 -8.6 0.0259 0.8 2.1 GX 17+2
275.9173 -30.2673 13.6 46.0 -27.6 0.0165 0.8 6.0 H1820-303
284.9193 -24.9871 5.4 39.8 -16.9 0.0325 2.1 7.5 HT1900.1-2455
28.4955 -22.3963 2.6 52.7 173.1 0.1482 4.5 ------ UNKNOWN
287.6671 -18.8667 1.1 39.6 -6.5 0.1762 10.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
94.452600 962.978400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9777 -15.6512 0.9 40.8 -87.5 24.9027 12.4 0.7 Sco X-1
255.9144 -37.7923 4.0 33.5 -126.3 1.9060 2.9 4.6 4U 1700-377
256.4657 -36.3822 1.4 32.5 -124.2 5.2754 8.1 2.9 GX 349+2
263.0138 -24.8204 5.1 23.6 -104.2 1.1876 2.3 4.5 GX 1+4
264.9163 -44.5856 11.8 32.0 -143.8 0.5275 1.0 11.0 4U 1735-44
268.3629 -1.4420 1.1 25.7 -44.8 4.9142 10.3 0.7 SW J1753.5-0127
270.3110 -25.0896 1.2 17.3 -109.4 3.8270 9.8 1.6 GX 5-1
270.2558 -25.7373 2.8 17.5 -111.4 1.6676 4.2 2.5 GRS 1758-258
274.0613 -14.0838 2.7 13.9 -67.1 1.8255 4.3 4.3 GX 17+2
275.9486 -30.3227 2.4 15.6 -134.5 1.8855 4.8 2.9 H1820-303
285.0024 -24.8518 3.6 6.5 -153.1 1.2571 3.2 4.5 HT1900.1-2455
288.7996 10.9520 0.5 29.8 7.0 12.5672 25.0 0.4 GRS 1915+105
262.9681 -33.8361 1.6 26.6 -124.4 3.6752 7.1 1.0 GX 354-0
282.0408 15.8770 3.6 35.2 -4.6 1.7749 3.2 ------ UNKNOWN
277.3167 -23.7832 1.7 10.8 -114.0 2.8978 6.9 ------ UNKNOWN
272.4305 22.3529 2.7 43.8 -15.8 3.0446 4.3 ------ UNKNOWN
270.0787 -13.1252 3.6 17.9 -69.1 1.4339 3.3 ------ UNKNOWN
266.8384 -27.3566 1.5 20.9 -113.0 3.6434 7.7 ------ UNKNOWN
255.2011 -41.6439 2.3 35.8 -131.8 3.4721 5.1 ------ UNKNOWN
258.7210 2.8784 2.4 35.8 -50.9 3.0206 4.9 ------ UNKNOWN
Plot creation:
Sun May 31 06:35:49 EDT 2015