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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
241.6070 -39.3222 0.0143 10.8068 2.0572 0.9263590 13.459 TRIG_00518792
Foreground time interval of the image:
-17.260 20.548 (delta_t = 37.808 [sec])
Background time interval of the image:
-239.072 -17.260 (delta_t = 221.812 [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 1.408000
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 1.408000
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 1.408000
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 -17.260 sec. to 20.548 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86726 ( -0.193913 0.200155 )
Norm@50keV : 1.36853E-03 ( -0.000173906 0.000171089 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.14 using 59 PHA bins.
# Reduced chi-squared = 1.353 for 57 degrees of freedom
# Null hypothesis probability = 3.902349e-02
Photon flux (15-150 keV) in 37.81 sec: 0.193725 ( -0.0212205 0.0212424 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.75699e-07 ( -5.95647e-08 6.07622e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -17.260 sec. to 20.548 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.882136 ( -1.16598 0.90846 )
Epeak [keV] : 46.5847 ( -10.3295 60.6847 )
Norm@50keV : 5.09807E-03 ( -0.00509991 0.0197133 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.70 using 59 PHA bins.
# Reduced chi-squared = 1.316 for 56 degrees of freedom
# Null hypothesis probability = 5.657957e-02
Photon flux (15-150 keV) in 37.81 sec: 0.185561 ( -0.022359 0.022457 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.24852e-07 ( -6.81185e-08 7.49394e-08 ) ergs/cm2
Band function
Time interval is from -17.260 sec. to 20.548 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.43038 ( -2.34218 -1.12305 )
beta : -2.31902 ( -0.501709 0.371971 )
Epeak [keV] : 31.4253 ( -7.81334 9.04143 )
Norm@50keV : 1.06284 ( -1.0618 30.8048 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.16 using 59 PHA bins.
# Reduced chi-squared = 1.276 for 55 degrees of freedom
# Null hypothesis probability = 8.183136e-02
Photon flux (15-150 keV) in 37.81 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.39288e-07 ( -4.39023e-07 -6.28395e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.2976 (-1.23248 1.44092)
R^2/D10^2 : 8.15991E-02 (-0.0323705 0.0519733)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.28 using 59 PHA bins.
# Reduced chi-squared = 1.461 for 57 degrees of freedom
# Null hypothesis probability = 1.316855e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.726e-08 1.208e-08
25- 50 1.742e-07 2.486e-08
50-150 9.891e-08 2.781e-08
15-150 3.404e-07 4.722e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 78.8546 (-23.5226 43.9085)
Norm : 0.916843 (-0.145834 0.181444)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.14 using 59 PHA bins.
# Reduced chi-squared = 1.301 for 57 degrees of freedom
# Null hypothesis probability = 6.318798e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.987e-08 1.512e-08
25- 50 1.474e-07 1.849e-08
50-150 2.061e-07 8.785e-08
15-150 4.434e-07 9.161e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.22600 (-1.89389 2.27523)
R1^2/D10^2 : 0.233754 (-0.131598 0.223205)
kT2 [keV] : 23.1230 (-8.97846 -23.5215)
R2^2/D10^2 : 2.22660E-03 (-0.00208367 0.013781)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.06 using 59 PHA bins.
# Reduced chi-squared = 1.292 for 55 degrees of freedom
# Null hypothesis probability = 7.141485e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.467e-08 3.962e-08
25- 50 1.557e-07 7.719e-08
50-150 1.975e-07 1.153e-07
15-150 4.378e-07 2.070e-07
Peak spectrum fit
Power-law model
Time interval is from 0.108 sec. to 1.108 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40239 ( -0.326036 0.325935 )
Norm@50keV : 6.05572E-03 ( -0.00107514 0.001071 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.13 using 59 PHA bins.
# Reduced chi-squared = 1.107 for 57 degrees of freedom
# Null hypothesis probability = 2.688608e-01
Photon flux (15-150 keV) in 1 sec: 0.737878 ( -0.134173 0.134996 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.8486e-08 ( -1.14103e-08 1.15863e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.108 sec. to 1.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28739 ( -1.22095 1.62487 )
Epeak [keV] : 330.440 ( -260.35 -260.35 )
Norm@50keV : 6.86137E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.10 using 59 PHA bins.
# Reduced chi-squared = 1.127 for 56 degrees of freedom
# Null hypothesis probability = 2.398023e-01
Photon flux (15-150 keV) in 1 sec: 0.733717 ( -0.141613 0.137531 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.81513e-08 ( -1.21544e-08 1.18382e-08 ) ergs/cm2
Band function
Time interval is from 0.108 sec. to 1.108 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.22380 ( -0.435344 0.9267 )
beta : -9.37167 ( 9.37167 19.3717 )
Epeak [keV] : 240.093 ( -162.4 -240.409 )
Norm@50keV : 7.32118E-03 ( -0.00229512 0.00917735 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.11 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 55 degrees of freedom
# Null hypothesis probability = 2.114787e-01
Photon flux (15-150 keV) in 1 sec: 0.729463 ( ) 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] : 18.6629 (-4.05243 5.3027)
R^2/D10^2 : 3.96581E-02 (-0.0224148 0.0512557)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.36 using 59 PHA bins.
# Reduced chi-squared = 1.252 for 57 degrees of freedom
# Null hypothesis probability = 9.559108e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.732e-09 9.980e-10
25- 50 1.298e-08 4.473e-09
50-150 3.309e-08 1.281e-08
15-150 4.880e-08 1.572e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-84.6671 -199.363)
Norm : 3.04617 (-0.537093 0.537093)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.95 using 59 PHA bins.
# Reduced chi-squared = 1.122 for 57 degrees of freedom
# Null hypothesis probability = 2.455971e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.585e-09 4.458e-09
25- 50 1.459e-08 8.405e-09
50-150 3.200e-08 1.847e-08
15-150 5.418e-08 3.107e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.54232 (-2.30893 2.93509)
R1^2/D10^2 : 1.72174 (-1.42337 6.3707)
kT2 [keV] : 26.0210 (-6.90589 14.2843)
R2^2/D10^2 : 1.14468E-02 (-0.0086822 0.0157869)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.02 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 55 degrees of freedom
# Null hypothesis probability = 2.685596e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.531e-09 4.292e-09
25- 50 1.281e-08 6.920e-09
50-150 3.837e-08 2.311e-08
15-150 5.871e-08 3.179e-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: 1.86726 ( -0.193913 0.200155 )
Norm@50keV : 1.36853E-03 ( -0.000173906 0.000171089 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.14 using 59 PHA bins.
# Reduced chi-squared = 1.353 for 57 degrees of freedom
# Null hypothesis probability = 3.902349e-02
Photon flux (15-150 keV) in 37.81 sec: 0.193725 ( -0.0212205 0.0212424 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.75699e-07 ( -5.95647e-08 6.07622e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.882136 ( -1.16598 0.90846 )
Epeak [keV] : 46.5847 ( -10.3295 60.6847 )
Norm@50keV : 5.09807E-03 ( -0.00509991 0.0197133 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.70 using 59 PHA bins.
# Reduced chi-squared = 1.316 for 56 degrees of freedom
# Null hypothesis probability = 5.657957e-02
Photon flux (15-150 keV) in 37.81 sec: 0.185561 ( -0.022359 0.022457 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.24852e-07 ( -6.81185e-08 7.49394e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.43038 ( -2.34218 -1.12305 )
beta : -2.31902 ( -0.501709 0.371971 )
Epeak [keV] : 31.4253 ( -7.81334 9.04143 )
Norm@50keV : 1.06284 ( -1.0618 30.8044 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.16 using 59 PHA bins.
# Reduced chi-squared = 1.276 for 55 degrees of freedom
# Null hypothesis probability = 8.183136e-02
Photon flux (15-150 keV) in 37.81 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.39288e-07 ( -4.39023e-07 -6.28395e-08 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.37e-07
S(50-100 keV) = 1.50e-07
T90 vs. Hardness ratio plot
T90 = 29.9279999732971 sec.
Hardness ratio (energy fluence ratio) = 1.09489
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.27571
Count Ratio (50-100 keV) / (15-25 keV) = 0.622109
Mask shadow pattern
IMX = 1.907596990060531E-01, IMY = -6.852290622875360E-03
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.408000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.408000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.408000
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:
-239.072000 -17.260000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.6123 -62.8088 3.1 50.6 10.6 2.4332 3.7 2.6 GX 301-2
244.9791 -15.6426 0.2 13.9 152.0 13.4082 65.0 0.1 Sco X-1
255.8547 -37.6637 0.0 11.1 -60.1 0.2268 1.0 12.5 4U 1700-377
256.4814 -36.4595 5.3 10.7 -66.6 0.4684 2.2 3.1 GX 349+2
263.0177 -24.7609 340.5 15.1 -124.5 -0.0069 -0.0 1.0 GX 1+4
264.6434 -44.5041 3.0 20.6 -58.4 0.8754 3.8 5.4 4U 1735-44
268.3856 -1.4906 2.4 34.6 -160.1 1.1704 4.8 2.5 SW J1753.5-0127
270.1019 -25.1906 8.2 21.0 -116.3 0.3255 1.4 11.9 GX 5-1
270.1187 -25.8558 0.0 20.8 -114.5 0.0693 0.3 12.0 GRS 1758-258
273.9530 -14.0540 2.9 29.3 -136.0 1.0422 4.0 3.3 GX 17+2
275.8410 -30.4037 5.4 25.0 -100.8 0.5791 2.2 4.9 H1820-303
285.0306 -24.9214 9.8 34.1 -108.6 0.4828 1.2 0.3 HT1900.1-2455
262.8322 -33.7262 102.1 14.2 -88.6 0.0255 0.1 10.2 GX 354-0
195.2890 -32.9440 3.7 43.8 51.4 2.6047 3.1 ------ UNKNOWN
258.1284 22.6319 2.3 53.2 172.7 3.9677 4.9 ------ UNKNOWN
262.6453 25.7272 2.9 57.2 176.6 5.5396 4.0 ------ UNKNOWN
228.1285 -61.9010 2.8 34.7 -4.9 1.0474 4.1 ------ UNKNOWN
293.6411 -23.4427 3.1 42.0 -107.1 3.6061 3.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-17.260000 20.548000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.7284 -62.7622 4.3 50.6 10.7 -0.5537 -2.7 2.0 GX 301-2
244.7792 -15.7276 0.0 13.8 151.2 0.1741 2.6 12.7 Sco X-1
256.1239 -37.9478 4.2 11.5 -59.8 0.2004 2.7 9.0 4U 1700-377
256.5666 -36.6034 0.0 10.8 -66.2 -0.1159 -1.6 12.5 GX 349+2
263.2010 -24.6376 0.0 15.3 -124.7 0.1080 1.5 12.3 GX 1+4
264.8601 -44.4827 5.6 20.7 -58.8 0.1604 2.0 5.4 4U 1735-44
268.3918 -1.6146 61.2 34.5 -160.0 -0.0164 -0.2 9.8 SW J1753.5-0127
270.3213 -25.2171 12.6 21.2 -116.1 0.0733 0.9 8.5 GX 5-1
270.4661 -25.7601 7.3 21.2 -114.6 -0.1369 -1.7 8.9 GRS 1758-258
273.9199 -13.8703 18.7 29.4 -136.4 -0.0548 -0.6 11.2 GX 17+2
276.1096 -30.2484 0.0 25.3 -101.1 0.2762 3.1 11.9 H1820-303
285.1979 -24.8589 2.8 34.2 -108.6 0.5215 4.1 9.6 HT1900.1-2455
263.1396 -33.7123 6.0 14.5 -88.9 0.1386 1.9 10.5 GX 354-0
241.6070 -39.3221 0.9 10.8 2.1 0.9263 13.5 ------ UNKNOWN
291.1137 -1.1605 2.2 50.7 -135.9 1.8831 5.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
57.428640 864.128600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2728 -60.5814 13.0 47.6 17.3 1.5232 0.9 2.8 Cen X-3
186.6179 -62.8101 1.6 39.9 13.9 7.4277 7.3 2.6 GX 301-2
244.9708 -15.6427 0.2 23.9 166.4 45.6315 66.8 0.5 Sco X-1
255.9722 -37.9818 8.1 11.3 -114.1 0.9262 1.4 8.3 4U 1700-377
256.2761 -36.3756 3.5 12.0 -121.5 2.0790 3.3 8.2 GX 349+2
262.8836 -24.8637 5.1 23.1 -144.3 1.4832 2.3 9.8 GX 1+4
264.6019 -44.4694 3.5 17.8 -87.6 2.2654 3.3 6.1 4U 1735-44
268.3771 -1.4245 7.3 45.1 -162.2 1.8305 1.6 1.8 SW J1753.5-0127
270.3133 -24.9405 4.3 28.1 -133.9 2.2518 2.7 8.5 GX 5-1
270.4010 -25.6148 2.7 27.8 -132.7 3.5808 4.2 9.4 GRS 1758-258
273.9967 -13.9959 2.4 38.1 -144.3 4.5723 4.7 2.5 GX 17+2
275.8937 -30.2285 9.6 29.4 -119.1 1.0702 1.2 8.5 H1820-303
285.0360 -24.9213 72.1 39.1 -120.1 0.2115 0.2 0.0 HT1900.1-2455
262.9892 -33.9819 14.3 18.0 -122.4 0.4906 0.8 8.8 GX 354-0
187.6470 -52.1394 2.9 38.7 30.7 4.0904 4.0 ------ UNKNOWN
248.3487 13.4197 3.3 53.1 166.5 10.2023 3.5 ------ UNKNOWN
238.5809 -53.0299 2.8 13.8 -14.3 2.4100 4.2 ------ UNKNOWN
283.6358 -39.6233 3.0 32.2 -97.6 3.8331 3.9 ------ UNKNOWN
Plot creation:
Sat May 30 19:51:36 EDT 2015