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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
269.8132 -27.6161 0.0105 24.7844 -167.8735 1.0357705 18.426 TRIG_00565651
Foreground time interval of the image:
-6.836 17.925 (delta_t = 24.761 [sec])
Background time interval of the image:
-149.075 -6.836 (delta_t = 142.239 [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 1.024000
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 1.024000
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 1.024000
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 -6.836 sec. to 319.196 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63975 ( -0.132627 0.134034 )
Norm@50keV : 7.30618E-04 ( -5.6796e-05 5.6494e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.80 using 59 PHA bins.
# Reduced chi-squared = 1.242 for 57 degrees of freedom
# Null hypothesis probability = 1.034102e-01
Photon flux (15-150 keV) in 326 sec: 9.50808E-02 ( -0.00731423 0.00733232 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.21751e-06 ( -1.8245e-07 1.83941e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.836 sec. to 319.196 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.918454 ( -0.659526 0.572068 )
Epeak [keV] : 72.7192 ( -15.3651 86.3726 )
Norm@50keV : 1.70916E-03 ( -0.000824288 0.00194482 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.04 using 59 PHA bins.
# Reduced chi-squared = 1.179 for 56 degrees of freedom
# Null hypothesis probability = 1.687202e-01
Photon flux (15-150 keV) in 326 sec: 9.13350E-02 ( -0.007879 0.0078792 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.08609e-06 ( -2.07039e-07 2.1041e-07 ) ergs/cm2
Band function
Time interval is from -6.836 sec. to 319.196 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.964335 ( -0.487929 1.45563 )
beta : -2.45503 ( 2.52466 0.819726 )
Epeak [keV] : 74.0480 ( -32.0771 81.6074 )
Norm@50keV : 1.62322E-03 ( -0.000871567 0.0177986 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.00 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 55 degrees of freedom
# Null hypothesis probability = 1.471868e-01
Photon flux (15-150 keV) in 326 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] : 13.8641 (-1.18126 1.31074)
R^2/D10^2 : 1.37414E-02 (-0.00386368 0.0052902)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.08 using 59 PHA bins.
# Reduced chi-squared = 1.598 for 57 degrees of freedom
# Null hypothesis probability = 2.772982e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.820e-07 2.833e-08
25- 50 6.705e-07 6.944e-08
50-150 8.443e-07 1.350e-07
15-150 1.697e-06 1.565e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 154.684 (-47.6667 -153.494)
Norm : 0.390035 (-0.0324996 0.0414361)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.08 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 57 degrees of freedom
# Null hypothesis probability = 1.697228e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.257e-07 3.687e-08
25- 50 6.064e-07 9.992e-08
50-150 1.212e-06 5.718e-07
15-150 2.144e-06 6.161e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.74958 (-1.95478 2.81475)
R1^2/D10^2 : 0.167486 (-0.118767 0.732235)
kT2 [keV] : 19.0063 (-3.19501 7.46273)
R2^2/D10^2 : 3.64962E-03 (-0.00272944 0.00272279)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.16 using 59 PHA bins.
# Reduced chi-squared = 1.221 for 55 degrees of freedom
# Null hypothesis probability = 1.259073e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.095e-07 1.352e-07
25- 50 6.106e-07 1.920e-07
50-150 1.095e-06 3.381e-07
15-150 2.015e-06 5.936e-07
Peak spectrum fit
Power-law model
Time interval is from -0.448 sec. to 0.552 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46717 ( -0.270846 0.274715 )
Norm@50keV : 6.75457E-03 ( -0.00113977 0.00113422 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.33 using 59 PHA bins.
# Reduced chi-squared = 1.287 for 57 degrees of freedom
# Null hypothesis probability = 7.144104e-02
Photon flux (15-150 keV) in 1 sec: 0.836004 ( -0.14116 0.141621 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.44375e-08 ( -1.17184e-08 1.18973e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.448 sec. to 0.552 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.142186 ( -1.89336 1.30607 )
Epeak [keV] : 68.1112 ( -15.2123 71.5697 )
Norm@50keV : 4.13361E-02 ( -0.0413886 0.288931 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.63 using 59 PHA bins.
# Reduced chi-squared = 1.225 for 56 degrees of freedom
# Null hypothesis probability = 1.198857e-01
Photon flux (15-150 keV) in 1 sec: 0.779985 ( -0.148285 0.148871 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.87149e-08 ( -1.21899e-08 1.27401e-08 ) ergs/cm2
Band function
Time interval is from -0.448 sec. to 0.552 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.143969 ( -0.846069 2.74814 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 68.0812 ( -15.1897 71.5485 )
Norm@50keV : 4.14237E-02 ( -0.0414237 0.290645 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.63 using 59 PHA bins.
# Reduced chi-squared = 1.248 for 55 degrees of freedom
# Null hypothesis probability = 1.024729e-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] : 15.5462 (-2.52482 3.12416)
R^2/D10^2 : 8.88524E-02 (-0.0424225 0.0768103)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.17 using 59 PHA bins.
# Reduced chi-squared = 1.231 for 57 degrees of freedom
# Null hypothesis probability = 1.129825e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.467e-09 1.527e-09
25- 50 1.833e-08 5.105e-09
50-150 3.062e-08 1.047e-08
15-150 5.342e-08 1.284e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-93.9222 -199.363)
Norm : 3.46438 (-0.568043 0.568274)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.88 using 59 PHA bins.
# Reduced chi-squared = 1.261 for 57 degrees of freedom
# Null hypothesis probability = 8.863850e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.627e-09 4.960e-09
25- 50 1.660e-08 9.420e-09
50-150 3.640e-08 2.023e-08
15-150 6.162e-08 3.488e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.64677 (-2.63313 94.6331)
R1^2/D10^2 : 33.5295 (-33.6624 -33.6624)
kT2 [keV] : 16.5649 (-2.91244 -16.5604)
R2^2/D10^2 : 6.88240E-02 (-0.0688438 0.03629)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.07 using 59 PHA bins.
# Reduced chi-squared = 1.238 for 55 degrees of freedom
# Null hypothesis probability = 1.108976e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.629e-09 2.610e-09
25- 50 1.703e-08 7.259e-09
50-150 3.259e-08 1.323e-08
15-150 5.625e-08 1.983e-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: 1.52088 ( -0.133697 0.134484 )
Norm@50keV : 2.82361E-03 ( -0.000222452 0.000221908 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.37 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 57 degrees of freedom
# Null hypothesis probability = 1.260328e-01
Photon flux (15-150 keV) in 24.76 sec: 0.354514 ( -0.0284378 0.0285106 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.6102e-07 ( -5.60415e-08 5.64241e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.638518 ( -0.655582 0.572163 )
Epeak [keV] : 79.1030 ( -15.1912 51.3631 )
Norm@50keV : 7.63410E-03 ( -0.00355861 0.00794544 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.97 using 59 PHA bins.
# Reduced chi-squared = 1.107 for 56 degrees of freedom
# Null hypothesis probability = 2.715783e-01
Photon flux (15-150 keV) in 24.76 sec: 0.338517 ( -0.03019 0.030222 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.23063e-07 ( -6.05605e-08 6.13181e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.638286 ( -0.453253 0.705078 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 79.0787 ( -15.1776 51.1684 )
Norm@50keV : 7.63633E-03 ( -0.00356179 0.00794794 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.97 using 59 PHA bins.
# Reduced chi-squared = 1.127 for 55 degrees of freedom
# Null hypothesis probability = 2.414321e-01
Photon flux (15-150 keV) in 24.76 sec: 0.341839 ( 6.65816 -0.034098 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.3111e-07 ( -6.30937e-07 -7.02515e-08 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 5.85e-07
S(50-100 keV) = 7.51e-07
T90 vs. Hardness ratio plot
T90 = 293.039999902248 sec.
Hardness ratio (energy fluence ratio) = 1.28376
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.23864
Count Ratio (50-100 keV) / (15-25 keV) = 0.871569
Mask shadow pattern
IMX = -4.514319169079626E-01, IMY = 9.699713905324081E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-149.075400 -6.836000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9811 -15.6360 0.3 36.3 -120.4 10.6275 38.1 0.3 Sco X-1
254.5398 35.2985 4.7 47.0 -39.6 0.9019 2.4 4.8 Her X-1
255.8948 -37.8039 5.3 39.7 -159.8 0.4180 2.2 5.0 4U 1700-377
256.2906 -36.3852 9.8 38.4 -158.7 0.2153 1.2 7.4 GX 349+2
262.9838 -24.7870 2.3 25.9 -152.3 0.7603 5.1 2.8 GX 1+4
264.8460 -44.6057 8.9 41.9 -174.0 -0.2830 -1.3 10.3 4U 1735-44
268.3857 -1.5902 3.3 12.4 -85.2 0.5375 3.5 8.3 SW J1753.5-0127
270.3845 -25.0246 9.5 22.2 -166.1 0.1679 1.2 6.4 GX 5-1
270.1254 -25.8243 3.2 23.1 -166.5 0.4905 3.7 10.7 GRS 1758-258
273.9699 -14.0727 3.2 11.1 -156.6 0.4967 3.6 3.0 GX 17+2
276.0743 -30.3814 5.6 25.8 177.9 0.3333 2.0 7.8 H1820-303
284.9092 -24.7646 30.9 20.3 157.4 0.0569 0.4 11.6 HT1900.1-2455
288.8056 10.9390 0.7 18.0 17.4 2.3397 16.1 0.6 GRS 1915+105
299.6229 35.2146 2.8 44.1 12.3 1.1152 4.1 1.8 Cyg X-1
308.1269 41.0655 6.4 52.6 15.7 1.0881 1.8 6.8 Cyg X-3
263.0931 -34.0214 0.0 33.2 -163.9 0.2428 1.5 12.3 GX 354-0
266.5466 -32.2709 1.9 30.2 -167.0 1.0038 6.2 ------ UNKNOWN
246.1363 -48.9322 2.8 52.7 -162.9 1.5485 4.1 ------ UNKNOWN
248.0864 35.4585 3.1 50.5 -44.8 2.7779 3.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-6.836000 17.924600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0154 -15.6398 5.2 36.3 -120.4 -0.2257 -2.2 2.1 Sco X-1
254.5766 35.2206 0.0 46.9 -39.6 -0.1937 -1.4 9.4 Her X-1
256.0809 -37.8590 5.8 39.6 -160.0 0.1602 2.0 4.6 4U 1700-377
256.4803 -36.4096 47.9 38.3 -158.9 -0.0190 -0.2 2.3 GX 349+2
262.8404 -24.7964 6.3 26.0 -152.1 -0.1037 -1.8 9.7 GX 1+4
264.8778 -44.4296 10.7 41.8 -174.0 -0.0856 -1.1 5.9 4U 1735-44
268.2407 -1.3244 20.1 12.6 -84.3 -0.0313 -0.6 10.8 SW J1753.5-0127
270.1058 -25.1673 6.2 22.5 -165.7 0.1020 1.8 11.0 GX 5-1
270.3295 -25.9034 10.5 23.0 -167.0 -0.0594 -1.1 9.7 GRS 1758-258
274.1248 -14.2138 0.0 11.1 -157.6 -0.1209 -2.3 12.7 GX 17+2
275.8003 -30.2244 5.9 25.6 178.5 0.1068 2.0 10.7 H1820-303
284.9113 -24.7544 0.0 20.3 157.4 0.0532 0.9 12.1 HT1900.1-2455
288.8123 10.7902 11.0 17.9 17.7 0.0572 1.0 9.4 GRS 1915+105
299.5419 35.1957 4.5 44.0 12.2 -0.2717 -2.6 2.4 Cyg X-1
308.1417 40.8384 4.2 52.4 15.9 0.6223 2.7 7.0 Cyg X-3
263.0931 -34.0214 0.0 33.2 -163.9 0.0451 0.7 12.3 GX 354-0
264.4160 -57.9651 1.9 54.5 179.7 1.2334 6.2 ------ UNKNOWN
269.8131 -27.6161 0.6 24.8 -167.9 1.0352 18.5 ------ UNKNOWN
247.6848 30.5112 2.2 47.2 -49.8 1.2272 5.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
68.524600 311.724600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9791 -15.6436 0.2 25.9 -63.4 19.4659 62.6 0.2 Sco X-1
256.0030 -37.7671 54.2 15.4 -130.5 0.0473 0.2 4.7 4U 1700-377
256.5004 -36.4976 2.7 14.3 -127.4 0.9691 4.3 5.5 GX 349+2
262.9980 -24.7370 3.2 6.7 -62.1 0.8577 3.7 0.8 GX 1+4
264.6147 -44.6003 3.7 17.5 -163.4 0.6985 3.2 10.6 4U 1735-44
268.2440 -1.6111 0.0 26.0 0.7 -0.1011 -0.5 12.1 SW J1753.5-0127
270.1282 -25.1955 160.8 2.4 11.2 -0.0176 -0.1 11.0 GX 5-1
270.2887 -25.7446 6.1 1.9 17.5 0.5116 2.2 0.8 GRS 1758-258
274.0958 -14.1784 5.6 14.0 21.7 0.4641 2.0 10.0 GX 17+2
276.0173 -30.3318 68.8 6.1 122.4 0.0401 0.2 5.2 H1820-303
285.0196 -24.8594 7.7 13.9 86.4 0.3583 1.5 3.8 HT1900.1-2455
288.8270 10.9546 1.7 42.7 32.4 3.5660 6.7 1.8 GRS 1915+105
263.1589 -33.6843 6.0 8.3 -134.1 0.4549 1.9 12.4 GX 354-0
314.7828 -41.6745 3.7 39.1 127.4 1.9776 3.1 ------ UNKNOWN
302.8596 -66.9702 2.3 44.2 166.5 2.6187 5.0 ------ UNKNOWN
269.8094 -27.6508 1.0 0.0 -179.4 2.5816 11.0 ------ UNKNOWN
266.5296 -32.2339 1.9 5.4 -145.0 1.4190 6.0 ------ UNKNOWN
252.6369 -48.8483 2.9 25.0 -148.4 0.9584 4.0 ------ UNKNOWN
233.6673 9.2362 2.6 50.8 -44.4 5.1286 4.4 ------ UNKNOWN
232.0623 4.1784 2.3 48.3 -50.6 5.7364 5.2 ------ UNKNOWN
Plot creation:
Sat May 30 15:56:48 EDT 2015