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
290.7218 -12.5846 0.0155 40.3269 -142.3042 0.5638398 12.427 TRIG_00595141
Foreground time interval of the image:
-0.680 3.448 (delta_t = 4.128 [sec])
Background time interval of the image:
-179.656 -0.680 (delta_t = 178.976 [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 2.048000
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 2.048000
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 2.048000
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 -0.680 sec. to 3.448 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48814 ( -0.244904 0.245436 )
Norm@50keV : 8.29607E-03 ( -0.00115257 0.0011494 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.10 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 57 degrees of freedom
# Null hypothesis probability = 4.345988e-01
Photon flux (15-150 keV) in 4.128 sec: 1.03241 ( -0.148812 0.149566 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25515e-07 ( -4.85432e-08 4.90002e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.680 sec. to 3.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00264 ( -1.17154 0.683137 )
Epeak [keV] : 109.221 ( -45.4834 -109.211 )
Norm@50keV : 1.41386E-02 ( -0.00679767 0.034075 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.35 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 56 degrees of freedom
# Null hypothesis probability = 4.249318e-01
Photon flux (15-150 keV) in 4.128 sec: 1.00539 ( -0.159234 0.15828 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.16317e-07 ( -5.19851e-08 5.22927e-08 ) ergs/cm2
Band function
Time interval is from -0.680 sec. to 3.448 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.00289 ( 0.916699 1.10404 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 109.259 ( -45.5517 -109.259 )
Norm@50keV : 1.41320E-02 ( -0.00679274 0.0340621 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.35 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 55 degrees of freedom
# Null hypothesis probability = 3.881380e-01
Photon flux (15-150 keV) in 4.128 sec: 1.00819 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.14371e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.7093 (-2.56604 3.19237)
R^2/D10^2 : 8.03717E-02 (-0.0369781 0.0647527)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.03 using 59 PHA bins.
# Reduced chi-squared = 1.158 for 57 degrees of freedom
# Null hypothesis probability = 1.932038e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.895e-08 5.379e-09
25- 50 8.270e-08 1.765e-08
50-150 1.639e-07 4.248e-08
15-150 2.656e-07 5.373e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-79.2752 -199.363)
Norm : 4.25021 (-0.583422 0.583491)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.83 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.443152e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.369e-08 2.462e-08
25- 50 8.404e-08 4.675e-08
50-150 1.843e-07 1.024e-07
15-150 3.120e-07 1.722e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.95124 (-1.50352 3.0102)
R1^2/D10^2 : 9.28482 (-8.46251 117.899)
kT2 [keV] : 20.3230 (-3.78874 6.05403)
R2^2/D10^2 : 3.72522E-02 (-0.0228856 0.0344009)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.18 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 55 degrees of freedom
# Null hypothesis probability = 4.676560e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.500e-08 2.324e-08
25- 50 7.269e-08 2.784e-08
50-150 1.880e-07 8.718e-08
15-150 3.057e-07 9.680e-08
Peak spectrum fit
Power-law model
Time interval is from 0.720 sec. to 1.720 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69892 ( -0.40416 0.420587 )
Norm@50keV : 1.06899E-02 ( -0.00252116 0.00243418 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.57 using 59 PHA bins.
# Reduced chi-squared = 1.168 for 57 degrees of freedom
# Null hypothesis probability = 1.807173e-01
Photon flux (15-150 keV) in 1 sec: 1.41920 ( -0.312063 0.312873 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.89841e-08 ( -2.38932e-08 2.4377e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.720 sec. to 1.720 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69896 ( -0.407924 0.42178 )
Epeak [keV] : 9999.33 ( -9999.35 -9999.36 )
Norm@50keV : 1.07455E-02 ( -0.0107051 0.025615 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.58 using 59 PHA bins.
# Reduced chi-squared = 1.189 for 56 degrees of freedom
# Null hypothesis probability = 1.574812e-01
Photon flux (15-150 keV) in 1 sec: 1.42425 ( -0.31695 0.30788 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.91423e-08 ( -2.40801e-08 2.36857e-08 ) ergs/cm2
Band function
Time interval is from 0.720 sec. to 1.720 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97979 ( -4.97979 -4.97979 )
beta : -1.80594 ( -0.541697 0.452258 )
Epeak [keV] : 23.1142 ( -23.1142 69.2369 )
Norm@50keV : 2174.65 ( -461.933 1.12603e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.91 using 59 PHA bins.
# Reduced chi-squared = 1.198 for 55 degrees of freedom
# Null hypothesis probability = 1.489610e-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] : 12.4764 (-3.93627 6.31201)
R^2/D10^2 : 0.282182 (-0.214666 0.863474)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.11 using 59 PHA bins.
# Reduced chi-squared = 1.353 for 57 degrees of freedom
# Null hypothesis probability = 3.922092e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.312e-09 4.625e-09
25- 50 3.065e-08 1.355e-08
50-150 2.942e-08 1.497e-08
15-150 6.938e-08 2.952e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 155.376 (-94.8132 -154.989)
Norm : 5.75330 (-1.33458 2.15224)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.43 using 59 PHA bins.
# Reduced chi-squared = 1.183 for 57 degrees of freedom
# Null hypothesis probability = 1.623407e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.473e-08 8.610e-09
25- 50 2.744e-08 1.552e-08
50-150 5.495e-08 3.302e-08
15-150 9.713e-08 5.715e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.70038 (-2.0346 3.50313)
R1^2/D10^2 : 4.26524 (-3.51238 24.5122)
kT2 [keV] : 30.9866 (-13.4858 -30.9866)
R2^2/D10^2 : 9.81366E-03 (-0.00964078 0.0424496)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.51 using 59 PHA bins.
# Reduced chi-squared = 1.191 for 55 degrees of freedom
# Null hypothesis probability = 1.568656e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.849e-08 1.130e-08
25- 50 2.420e-08 1.274e-08
50-150 6.155e-08 3.607e-08
15-150 1.042e-07 5.580e-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: 1.48814 ( -0.244904 0.245436 )
Norm@50keV : 8.29607E-03 ( -0.00115257 0.0011494 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.10 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 57 degrees of freedom
# Null hypothesis probability = 4.345988e-01
Photon flux (15-150 keV) in 4.128 sec: 1.03241 ( -0.148812 0.149566 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25515e-07 ( -4.85432e-08 4.90002e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00264 ( -1.17154 0.683137 )
Epeak [keV] : 109.221 ( -45.4834 -109.211 )
Norm@50keV : 1.41386E-02 ( -0.00679767 0.034075 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.35 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 56 degrees of freedom
# Null hypothesis probability = 4.249318e-01
Photon flux (15-150 keV) in 4.128 sec: 1.00539 ( -0.159234 0.15828 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.16317e-07 ( -5.19851e-08 5.22927e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.00289 ( 0.916699 1.10404 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 109.259 ( -45.5517 -109.259 )
Norm@50keV : 1.41320E-02 ( -0.00679274 0.0340621 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.35 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 55 degrees of freedom
# Null hypothesis probability = 3.881380e-01
Photon flux (15-150 keV) in 4.128 sec: 1.00819 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.14371e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 8.00e-08
S(50-100 keV) = 1.14e-07
T90 vs. Hardness ratio plot
T90 = 3.62799996137619 sec.
Hardness ratio (energy fluence ratio) = 1.425
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.967615
Count Ratio (50-100 keV) / (15-25 keV) = 1.1503
Mask shadow pattern
IMX = -6.716837489736525E-01, IMY = 5.190579036363208E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
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:
-179.656000 -0.680000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.6174 -60.6159 69.0 54.3 18.4 0.2564 0.2 8.9 Cen X-3
186.8229 -62.8265 8.0 46.3 17.8 0.8657 1.4 5.7 GX 301-2
244.9780 -15.6359 0.7 26.7 134.3 5.5813 16.4 0.3 Sco X-1
255.9897 -37.8128 1.3 2.5 139.2 2.1836 8.6 1.9 4U 1700-377
256.3539 -36.4662 2.9 3.7 151.0 1.0265 3.9 4.7 GX 349+2
262.8278 -24.7989 4.5 16.0 -179.9 0.7033 2.5 10.4 GX 1+4
264.5041 -44.5150 7.3 7.0 -67.3 -0.4121 -1.6 10.9 4U 1735-44
268.4669 -1.3229 6.6 40.1 178.9 0.7650 1.8 9.8 SW J1753.5-0127
270.2500 -25.0679 4.0 18.6 -158.8 0.7860 2.9 2.0 GX 5-1
270.4082 -25.8774 6.9 18.0 -157.0 0.4445 1.7 9.9 GRS 1758-258
274.1462 -14.0150 3.2 30.0 -164.3 1.1115 3.6 8.3 GX 17+2
275.8207 -30.2038 6.5 18.1 -136.1 0.4678 1.8 11.2 H1820-303
285.1174 -24.9343 4.7 27.8 -133.3 0.8316 2.4 4.5 HT1900.1-2455
288.7992 10.9481 915.5 58.9 -161.8 -0.0239 -0.0 0.2 GRS 1915+105
262.9326 -33.8102 4.9 7.8 -160.9 0.6570 2.4 3.2 GX 354-0
185.7668 -47.8683 2.9 50.1 37.2 5.3090 4.0 ------ UNKNOWN
249.6329 8.3216 2.6 49.0 151.3 5.0986 4.4 ------ UNKNOWN
240.5999 -46.5310 3.4 13.6 37.8 0.8792 3.4 ------ UNKNOWN
237.3162 -60.7820 3.4 24.0 5.3 0.9318 3.4 ------ UNKNOWN
265.6768 -27.7041 2.0 14.3 -166.7 1.6028 5.7 ------ UNKNOWN
266.1067 -28.7364 1.3 13.5 -163.2 2.5229 8.7 ------ UNKNOWN
UNKNOWN
UNKNOWN
UNKNOWN
UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.680000 3.448000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4055 -60.6013 4.3 54.4 18.3 -0.4435 -2.6 2.9 Cen X-3
186.6316 -62.6590 8.4 46.4 18.0 -0.0831 -1.4 6.7 GX 301-2
245.0820 -15.5263 3.6 26.8 134.6 -0.1070 -3.2 9.0 Sco X-1
256.1718 -37.8802 4.8 2.4 141.8 -0.0622 -2.4 9.0 4U 1700-377
256.6724 -36.3305 0.0 3.8 155.1 -0.0139 -0.6 12.7 GX 349+2
263.1331 -24.8143 4.0 16.1 -178.9 0.0741 2.9 7.9 GX 1+4
264.5382 -44.4170 7.1 6.9 -68.1 -0.0412 -1.6 9.0 4U 1735-44
268.4322 -1.4159 7.0 40.0 178.9 0.0675 1.6 4.4 SW J1753.5-0127
270.1722 -24.9036 3.4 18.7 -159.3 0.0848 3.4 12.2 GX 5-1
270.3312 -25.5962 55.4 18.2 -157.7 -0.0052 -0.2 8.9 GRS 1758-258
274.0380 -14.1536 5.6 29.9 -164.4 -0.0578 -2.1 7.3 GX 17+2
276.0740 -30.5362 0.0 18.1 -134.9 -0.0617 -2.3 12.7 H1820-303
285.1932 -25.0595 6.3 27.8 -133.0 0.0566 1.8 11.9 HT1900.1-2455
288.7186 10.8191 0.0 58.7 -161.8 0.0615 0.4 8.9 GRS 1915+105
262.7692 -33.9396 0.0 7.6 -161.2 -0.0171 -0.7 12.6 GX 354-0
200.1067 -40.8993 2.3 42.6 50.9 0.4341 4.9 ------ UNKNOWN
264.0913 14.1838 2.2 54.7 169.5 0.7005 5.2 ------ UNKNOWN
266.4987 11.0987 2.2 52.0 172.9 0.4689 5.3 ------ UNKNOWN
279.0894 13.4474 2.5 57.3 -173.2 0.5963 4.6 ------ UNKNOWN
290.7218 -12.5846 0.9 40.3 -142.3 0.5637 12.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
89.244630 902.420500
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.8113 -37.8718 6.9 40.0 52.7 5.6205 1.7 8.5 4U 1700-377
256.6092 -36.3684 60.8 38.7 54.2 -0.5901 -0.2 9.0 GX 349+2
262.9137 -24.8741 22.4 28.9 69.0 1.0714 0.5 9.3 GX 1+4
264.5576 -44.3982 6.2 38.9 38.2 4.5816 1.9 8.5 4U 1735-44
268.5158 -1.4827 9.1 24.6 123.2 -2.0830 -1.3 9.0 SW J1753.5-0127
270.2430 -25.1257 2.8 23.0 62.1 6.2507 4.2 3.6 GX 5-1
270.4743 -25.8688 12.7 23.2 60.2 -1.3784 -0.9 12.0 GRS 1758-258
273.8624 -14.1910 0.0 16.4 90.6 3.4879 2.2 12.5 GX 17+2
275.9651 -30.3537 6.2 22.4 43.2 2.6754 1.9 2.2 H1820-303
284.8719 -24.9136 3.3 13.5 31.3 4.6127 3.5 8.9 HT1900.1-2455
288.8105 10.9540 1.4 23.6 -176.5 10.9470 8.3 0.9 GRS 1915+105
299.5162 35.2024 2.4 48.5 -162.3 14.9635 4.8 3.6 Cyg X-1
308.0066 40.8748 8.0 55.8 -156.1 -9.8015 -1.5 6.6 Cyg X-3
262.9003 -33.8257 2.8 33.0 53.4 9.0430 4.2 4.5 GX 354-0
252.7816 -52.5430 3.0 50.1 37.2 22.5962 3.8 ------ UNKNOWN
266.1742 -28.7448 1.4 27.9 59.0 15.8285 8.3 ------ UNKNOWN
283.2864 -24.3714 3.1 13.7 37.7 4.9596 3.8 ------ UNKNOWN
306.0107 -63.5611 3.2 52.1 -0.5 12.8295 3.6 ------ UNKNOWN
310.4419 -68.2617 2.6 57.1 -0.5 28.3175 4.4 ------ UNKNOWN
317.8568 -16.4049 2.4 26.6 -70.4 8.0264 4.8 ------ UNKNOWN
322.6944 21.2497 3.0 46.2 -128.7 22.3686 3.8 ------ UNKNOWN
Plot creation:
Sat May 30 13:55:20 EDT 2015