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
273.1233 -9.5249 0.0144 14.5632 -147.7568 0.0962465 13.456 TRIG_00559075
Foreground time interval of the image:
-0.012 0.180 (delta_t = 0.192 [sec])
Background time interval of the image:
-239.496 -0.012 (delta_t = 239.484 [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 0.064000
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 0.064000
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 0.064000
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 -0.012 sec. to 0.180 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22102 ( -0.210179 0.208808 )
Norm@50keV : 3.10696E-02 ( -0.00385959 0.00385865 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.32 using 59 PHA bins.
# Reduced chi-squared = 1.128 for 57 degrees of freedom
# Null hypothesis probability = 2.358127e-01
Photon flux (15-150 keV) in 0.192 sec: 3.65809 ( -0.464584 0.465561 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.01676e-08 ( -8.27142e-09 8.34956e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.012 sec. to 0.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.165606 ( -1.22638 0.951531 )
Epeak [keV] : 95.8004 ( -25.0447 296.844 )
Norm@50keV : 9.50661E-02 ( -0.059596 0.223602 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.69 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 56 degrees of freedom
# Null hypothesis probability = 3.105638e-01
Photon flux (15-150 keV) in 0.192 sec: 3.49717 ( -0.49306 0.48998 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.70818e-08 ( -8.74234e-09 8.87424e-09 ) ergs/cm2
Band function
Time interval is from -0.012 sec. to 0.180 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.165296 ( -0.967616 0.813357 )
beta : -10.0000 ( 10 1.06581e-14 )
Epeak [keV] : 95.8028 ( -20.0444 344.744 )
Norm@50keV : 9.50720E-02 ( -0.0596023 0.223779 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.69 using 59 PHA bins.
# Reduced chi-squared = 1.104 for 55 degrees of freedom
# Null hypothesis probability = 2.781854e-01
Photon flux (15-150 keV) in 0.192 sec: 3.54161 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.75562e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.9625 (-2.47833 2.96299)
R^2/D10^2 : 0.207606 (-0.0796908 0.123297)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.55 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 57 degrees of freedom
# Null hypothesis probability = 2.296893e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.819e-09 6.413e-10
25- 50 1.354e-08 2.635e-09
50-150 3.577e-08 8.506e-09
15-150 5.213e-08 9.571e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 15.1209 (-1.90747 1.90729)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.68 using 59 PHA bins.
# Reduced chi-squared = 1.223 for 57 degrees of freedom
# Null hypothesis probability = 1.207840e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.232e-09 4.063e-09
25- 50 1.391e-08 7.559e-09
50-150 3.051e-08 1.678e-08
15-150 5.166e-08 2.888e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.17422 (-2.21736 4.48401)
R1^2/D10^2 : 15.0633 (-14.2275 197.128)
kT2 [keV] : 21.3250 (-3.34911 5.28537)
R2^2/D10^2 : 0.132227 (-0.0737075 0.0625383)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.30 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 55 degrees of freedom
# Null hypothesis probability = 3.550673e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.388e-09 2.532e-09
25- 50 1.256e-08 3.647e-09
50-150 3.817e-08 1.212e-08
15-150 5.612e-08 1.384e-08
Peak spectrum fit
Power-law model
Time interval is from -0.414 sec. to 0.586 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19586 ( -0.320881 0.310849 )
Norm@50keV : 7.44362E-03 ( -0.00130088 0.0012983 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.25 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 57 degrees of freedom
# Null hypothesis probability = 4.659014e-01
Photon flux (15-150 keV) in 1 sec: 0.873236 ( -0.15991 0.161105 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.56072e-08 ( -1.41135e-08 1.42467e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.414 sec. to 0.586 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.735949 ( -1.5721 1.29655 )
Epeak [keV] : 160.536 ( -160.655 -160.655 )
Norm@50keV : 1.17911E-02 ( -0.00547419 0.0360215 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.82 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 56 degrees of freedom
# Null hypothesis probability = 4.442068e-01
Photon flux (15-150 keV) in 1 sec: 0.850951 ( -0.1721 0.169019 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.41205e-08 ( -1.47417e-08 1.48086e-08 ) ergs/cm2
Band function
Time interval is from -0.414 sec. to 0.586 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.668048 ( -0.671814 1.50801 )
beta : -9.37155 ( 9.37164 19.3716 )
Epeak [keV] : 147.316 ( -67.7086 -147.644 )
Norm@50keV : 1.26143E-02 ( -0.00628214 0.012084 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.83 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 55 degrees of freedom
# Null hypothesis probability = 4.066759e-01
Photon flux (15-150 keV) in 1 sec: 0.860068 0.855253 ( ) 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] : 21.7392 (-4.18024 5.60249)
R^2/D10^2 : 3.08166E-02 (-0.0161124 0.0312844)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.80 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 57 degrees of freedom
# Null hypothesis probability = 3.408895e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.710e-09 1.058e-09
25- 50 1.423e-08 4.210e-09
50-150 5.022e-08 1.762e-08
15-150 6.716e-08 1.910e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 3.67460 (-0.652149 0.652035)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.92 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 57 degrees of freedom
# Null hypothesis probability = 3.368419e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.156e-09 5.240e-09
25- 50 1.761e-08 1.011e-08
50-150 3.863e-08 2.194e-08
15-150 6.539e-08 3.721e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.20091 (-2.34017 3.51049)
R1^2/D10^2 : 2.08464 (-1.86082 32.0588)
kT2 [keV] : 26.3307 (-5.97004 10.7701)
R2^2/D10^2 : 1.51861E-02 (-0.0101218 0.0208401)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.96 using 59 PHA bins.
# Reduced chi-squared = 0.9811 for 55 degrees of freedom
# Null hypothesis probability = 5.142761e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.698e-09 4.452e-09
25- 50 1.461e-08 7.780e-09
50-150 5.293e-08 3.079e-08
15-150 7.524e-08 4.029e-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: 1.22102 ( -0.210179 0.208808 )
Norm@50keV : 3.10696E-02 ( -0.00385959 0.00385865 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.32 using 59 PHA bins.
# Reduced chi-squared = 1.128 for 57 degrees of freedom
# Null hypothesis probability = 2.358127e-01
Photon flux (15-150 keV) in 0.192 sec: 3.65809 ( -0.464584 0.465561 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.01676e-08 ( -8.27142e-09 8.34956e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.165606 ( -1.22638 0.951531 )
Epeak [keV] : 95.8004 ( -25.0447 296.844 )
Norm@50keV : 9.50661E-02 ( -0.059596 0.223602 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.69 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 56 degrees of freedom
# Null hypothesis probability = 3.105638e-01
Photon flux (15-150 keV) in 0.192 sec: 3.49717 ( -0.49306 0.48998 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.70818e-08 ( -8.74234e-09 8.87424e-09 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.165296 ( -0.967616 0.813357 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 95.8028 ( -20.0444 344.744 )
Norm@50keV : 9.50720E-02 ( -0.0596023 0.223779 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.69 using 59 PHA bins.
# Reduced chi-squared = 1.104 for 55 degrees of freedom
# Null hypothesis probability = 2.781854e-01
Photon flux (15-150 keV) in 0.192 sec: 3.54161 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.75562e-08 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.28e-08
S(50-100 keV) = 2.20e-08
T90 vs. Hardness ratio plot
T90 = 0.159999966621399 sec.
Hardness ratio (energy fluence ratio) = 1.71875
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.27103
Count Ratio (50-100 keV) / (15-25 keV) = 1.58473
Mask shadow pattern
IMX = -2.197313037189493E-01, IMY = 1.386037145445926E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-239.496000 -0.012000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9777 -15.6421 0.3 39.3 178.7 18.4231 42.2 0.2 Sco X-1
255.9962 -37.8669 0.9 33.5 138.3 6.3692 12.5 1.4 4U 1700-377
256.4217 -36.5619 5.6 32.6 140.1 1.0239 2.1 8.4 GX 349+2
263.0593 -24.8203 10.0 22.7 158.9 0.3374 1.1 5.3 GX 1+4
264.5682 -44.4433 4.0 32.8 121.5 -1.5557 -2.9 7.5 4U 1735-44
268.2217 -1.4884 7.5 23.4 -137.4 0.4533 1.5 9.0 SW J1753.5-0127
270.3154 -25.2267 10.5 16.7 150.8 0.3217 1.1 9.0 GX 5-1
270.2880 -25.8877 4.3 17.0 148.8 0.7889 2.7 8.7 GRS 1758-258
274.0422 -14.0510 2.1 11.9 -164.2 1.6120 5.4 2.3 GX 17+2
275.9112 -30.2455 36.0 16.1 125.7 -0.1031 -0.3 7.3 H1820-303
285.1678 -24.7655 7.1 7.7 98.0 0.4669 1.6 11.7 HT1900.1-2455
288.7708 10.9855 1.3 28.2 -81.4 3.5912 9.0 2.9 GRS 1915+105
263.1258 -33.9918 4.1 26.5 138.8 -1.0451 -2.8 11.6 GX 354-0
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.012000 0.180000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8807 -15.7418 9.2 39.3 178.5 -0.0133 -1.3 8.3 Sco X-1
255.9717 -37.9661 15.1 33.6 138.2 -0.0099 -0.8 7.3 4U 1700-377
256.3631 -36.5485 40.5 32.6 140.2 -0.0035 -0.3 8.3 GX 349+2
262.9056 -24.7624 5.6 22.8 159.1 0.0167 2.1 5.7 GX 1+4
264.5609 -44.4010 3.8 32.7 121.5 0.0472 3.0 8.3 4U 1735-44
268.3798 -1.5426 5.0 23.2 -137.2 0.0179 2.3 5.4 SW J1753.5-0127
270.4532 -24.9441 0.0 16.5 151.5 -0.0176 -2.2 12.3 GX 5-1
270.4669 -25.7517 4.8 16.8 149.0 0.0189 2.4 8.9 GRS 1758-258
273.9895 -13.8893 7.0 11.9 -163.6 0.0112 1.6 8.9 GX 17+2
275.8459 -30.3629 11.9 16.2 125.6 0.0074 1.0 4.1 H1820-303
284.9246 -24.7745 12.2 7.8 99.6 0.0070 0.9 10.7 HT1900.1-2455
288.9444 10.8005 0.0 28.0 -81.0 -0.0130 -1.3 12.2 GRS 1915+105
263.1498 -33.9773 3.5 26.5 138.8 -0.0305 -3.3 11.7 GX 354-0
305.0306 -10.2034 2.5 19.8 -15.1 0.0342 4.7 ------ UNKNOWN
273.1233 -9.5249 0.9 14.6 -147.8 0.0962 13.5 ------ UNKNOWN
262.6846 14.1606 1.9 38.7 -125.0 0.0853 6.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
47.004600 125.004600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9947 -15.6486 0.5 28.1 173.6 6.8005 22.7 1.0 Sco X-1
255.9869 -37.8286 2.4 32.2 125.0 2.0692 4.7 0.9 4U 1700-377
256.3847 -36.4652 4.2 30.9 125.9 1.0921 2.7 3.5 GX 349+2
262.8697 -24.6099 3.5 18.0 130.8 0.8822 3.3 11.1 GX 1+4
264.9529 -44.5928 0.0 35.8 109.1 -1.2207 -2.1 12.4 4U 1735-44
268.3659 -1.3849 7.7 9.4 -111.5 0.4001 1.5 4.1 SW J1753.5-0127
270.4490 -25.0961 3.6 15.8 108.1 0.8692 3.4 9.0 GX 5-1
270.4414 -25.6090 7.4 16.3 107.8 0.4840 1.9 11.0 GRS 1758-258
273.8710 -13.9885 7.1 4.5 90.1 0.4267 1.6 8.4 GX 17+2
276.1157 -30.4905 0.0 21.1 92.0 0.0751 0.2 12.3 H1820-303
285.2087 -24.9727 86.3 19.2 64.0 0.0402 0.1 9.9 HT1900.1-2455
288.7414 10.8593 3.0 25.6 -43.3 1.0359 3.8 6.2 GRS 1915+105
262.8709 -33.7007 9.3 25.9 118.9 -0.4178 -1.2 10.0 GX 354-0
285.6184 -15.7470 2.6 13.7 37.4 1.1409 4.4 ------ UNKNOWN
241.4300 -16.0389 2.7 31.6 173.9 1.2530 4.3 ------ UNKNOWN
220.9873 -10.8284 2.4 51.3 -177.2 3.5841 4.9 ------ UNKNOWN
223.5146 -7.3207 2.4 49.1 -172.4 2.7442 4.9 ------ UNKNOWN
321.0381 20.6972 2.7 55.9 -24.0 4.3673 4.2 ------ UNKNOWN
Plot creation:
Sat May 30 16:17:00 EDT 2015