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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
264.1950 -25.2153 0.0086 52.5638 166.9460 17.5576724 22.467 TRIG_00361831
Foreground time interval of the image:
-15.168 50.733 (delta_t = 65.901 [sec])
Background time interval of the image:
-56.467 -15.168 (delta_t = 41.299 [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 4.096000
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 4.096000
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 4.096000
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 -15.168 sec. to 64.832 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56357 ( -0.0763854 0.0763904 )
Norm@50keV : 1.68694E-02 ( -0.000687509 0.000687436 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.36 using 59 PHA bins.
# Reduced chi-squared = 0.8484 for 57 degrees of freedom
# Null hypothesis probability = 7.855262e-01
Photon flux (15-150 keV) in 80 sec: 2.14405 ( -0.0980571 0.0984693 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26808e-05 ( -5.37447e-07 5.38774e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.168 sec. to 64.832 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56082 ( -0.140825 0.0772558 )
Epeak [keV] : 9999.22 ( -9999.35 -9999.35 )
Norm@50keV : 1.68930E-02 ( -0.000688682 0.00305425 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.39 using 59 PHA bins.
# Reduced chi-squared = 0.8641 for 56 degrees of freedom
# Null hypothesis probability = 7.550953e-01
Photon flux (15-150 keV) in 80 sec: 2.14402 ( -0.09869 0.09741 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26738e-05 ( -5.2936e-07 5.3304e-07 ) ergs/cm2
Band function
Time interval is from -15.168 sec. to 64.832 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.20510 ( -3.27724 -3.27724 )
beta : -1.58754 ( -0.0892117 0.088846 )
Epeak [keV] : 24.0063 ( -24.478 185.013 )
Norm@50keV : 102.418 ( -102.376 2431.07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.26 using 59 PHA bins.
# Reduced chi-squared = 0.8593 for 55 degrees of freedom
# Null hypothesis probability = 7.614880e-01
Photon flux (15-150 keV) in 80 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] : 16.2533 ( )
R^2/D10^2 : 0.172233 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 235.68 using 59 PHA bins.
# Reduced chi-squared = 4.1347 for 57 degrees of freedom
# Null hypothesis probability = 1.378199e-23
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.499e-07 6.320e-08
25- 50 3.198e-06 1.944e-07
50-150 5.939e-06 4.428e-07
15-150 9.887e-06 4.880e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 8.67726 (-0.354187 0.354184)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.77 using 59 PHA bins.
# Reduced chi-squared = 0.9784 for 57 degrees of freedom
# Null hypothesis probability = 5.214172e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.729e-06 8.000e-08
25- 50 3.326e-06 1.676e-07
50-150 7.294e-06 3.608e-07
15-150 1.235e-05 6.160e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.83236 (-0.846843 0.922446)
R1^2/D10^2 : 1.72077 (-0.551266 0.872467)
kT2 [keV] : 35.0476 (-5.34699 8.42597)
R2^2/D10^2 : 9.76747E-03 (-0.00471062 0.00717632)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.42 using 59 PHA bins.
# Reduced chi-squared = 0.8258 for 55 degrees of freedom
# Null hypothesis probability = 8.180406e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.638e-06 2.240e-07
25- 50 3.422e-06 3.300e-07
50-150 7.755e-06 1.216e-06
15-150 1.282e-05 1.712e-06
Peak spectrum fit
Power-law model
Time interval is from 8.332 sec. to 9.332 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87721 ( -0.483246 0.54962 )
Norm@50keV : 1.92666E-02 ( -0.00638483 0.00608031 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.25 using 59 PHA bins.
# Reduced chi-squared = 1.162 for 57 degrees of freedom
# Null hypothesis probability = 1.879807e-01
Photon flux (15-150 keV) in 1 sec: 2.73859 ( -0.794241 0.797169 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.77117e-07 ( -5.59718e-08 5.74626e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.332 sec. to 9.332 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.887210 ( -5.56723 1.28685 )
Epeak [keV] : 50.1984 ( -42.1129 -50.0816 )
Norm@50keV : 6.75723E-02 ( -0.068985 93.6832 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.86 using 59 PHA bins.
# Reduced chi-squared = 1.176 for 56 degrees of freedom
# Null hypothesis probability = 1.725823e-01
Photon flux (15-150 keV) in 1 sec: 2.64214 ( -0.87734 0.83945 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.64274e-07 ( -6.2616e-08 6.6058e-08 ) ergs/cm2
Band function
Time interval is from 8.332 sec. to 9.332 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.480844 ( 0.468931 0.468931 )
beta : -2.42527 ( 2.49239 1.02554 )
Epeak [keV] : 44.5099 ( -45.081 63.3196 )
Norm@50keV : 0.121408 ( -0.130396 6916.49 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.51 using 59 PHA bins.
# Reduced chi-squared = 1.191 for 55 degrees of freedom
# Null hypothesis probability = 1.568985e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.66079e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.1831 (-2.89222 4.10567)
R^2/D10^2 : 0.875477 (-0.875441 1.82177)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.71 using 59 PHA bins.
# Reduced chi-squared = 1.170 for 57 degrees of freedom
# Null hypothesis probability = 1.776396e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.295e-08 1.437e-08
25- 50 6.627e-08 4.068e-08
50-150 4.740e-08 3.262e-08
15-150 1.366e-07 8.590e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 85.1643 (-48.4674 -85.1643)
Norm : 12.7094 (-4.44597 7.38322)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.91 using 59 PHA bins.
# Reduced chi-squared = 1.156 for 57 degrees of freedom
# Null hypothesis probability = 1.959865e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.309e-08 2.031e-08
25- 50 5.528e-08 3.315e-08
50-150 8.131e-08 6.715e-08
15-150 1.697e-07 1.081e-07
Double BB
R1^2/D10^2 : 1.20653 ( )
kT2 [keV] : 199.245 (-199.281 -199.281)
R2^2/D10^2 : 1.66318E-04 (-0.000167414 1.61182)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.93 using 59 PHA bins.
#Fit statistic : Chi-Squared = 64.95 using 59 PHA bins.
#Fit statistic : Chi-Squared = 64.81 using 59 PHA bins.
# Reduced chi-squared = 1.199 for 55 degrees of freedom
# Reduced chi-squared = 1.181 for 55 degrees of freedom
# Reduced chi-squared = 1.178 for 55 degrees of freedom
# Null hypothesis probability = 1.486113e-01
# Null hypothesis probability = 1.687224e-01
# Null hypothesis probability = 1.716000e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.076e-08 1.413e-08
25- 50 5.997e-08 3.572e-08
50-150 5.612e-08 3.812e-08
15-150 1.468e-07 8.085e-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: 1.57691 ( -0.0742833 0.0741959 )
Norm@50keV : 1.95040E-02 ( -0.000779594 0.00077945 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.13 using 59 PHA bins.
# Reduced chi-squared = 0.9321 for 57 degrees of freedom
# Null hypothesis probability = 6.211267e-01
Photon flux (15-150 keV) in 65.9 sec: 2.48877 ( -0.111261 0.111709 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.20556e-05 ( -5.01214e-07 5.02141e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57643 ( -0.110928 0.0734544 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 1.95411E-02 ( -0.000780383 0.00467623 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.15 using 59 PHA bins.
# Reduced chi-squared = 0.9490 for 56 degrees of freedom
# Null hypothesis probability = 5.836264e-01
Photon flux (15-150 keV) in 65.9 sec: 2.49112 ( -0.11466 0.05345 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.20559e-05 ( -4.99852e-07 4.95963e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.70878E-02 ( -1.53312 -1.53312 )
beta : -1.61748 ( -0.127785 0.0882287 )
Epeak [keV] : 35.1667 ( -27.6657 136.76 )
Norm@50keV : 0.268021 ( -0.266917 1199.43 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.56 using 59 PHA bins.
# Reduced chi-squared = 0.9374 for 55 degrees of freedom
# Null hypothesis probability = 6.069706e-01
Photon flux (15-150 keV) in 65.9 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) = 3.23e-06
S(50-100 keV) = 4.37e-06
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 1.35294
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.55984
Count Ratio (50-100 keV) / (15-25 keV) = 1.27888
Mask shadow pattern
IMX = -1.272480387655472E+00, IMY = -2.950394380625843E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
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:
-56.467380 -15.168000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9853 -15.6412 0.9 47.2 -167.3 1.9264 13.2 0.3 Sco X-1
254.3246 35.5063 9.3 12.2 -59.4 0.0983 1.2 11.8 Her X-1
263.0046 -24.8396 3.9 52.2 168.3 0.8902 3.0 5.6 GX 1+4
268.4568 -1.4474 3.4 29.0 158.9 0.3137 3.4 5.3 SW J1753.5-0127
270.4445 -25.0044 5.8 52.6 159.8 0.8219 2.0 9.8 GX 5-1
270.1792 -25.7475 521.6 53.3 160.2 0.0100 0.0 6.7 GRS 1758-258
274.1904 -13.9194 0.0 42.2 152.7 0.2116 1.1 12.8 GX 17+2
288.8264 10.9372 11.3 27.8 107.6 0.1166 1.0 1.7 GRS 1915+105
299.5904 35.1838 0.9 30.4 52.4 1.5160 13.1 1.1 Cyg X-1
308.1089 40.8088 14.8 37.7 43.8 0.1299 0.8 8.6 Cyg X-3
270.3991 -2.8317 2.0 30.6 155.4 0.5729 5.7 ------ UNKNOWN
258.5448 -12.5699 3.3 40.4 175.8 0.4289 3.5 ------ UNKNOWN
250.4482 -10.1100 2.2 40.0 -171.3 0.5804 5.2 ------ UNKNOWN
223.9656 71.5699 2.5 49.6 -29.8 0.9261 4.7 ------ UNKNOWN
222.7348 9.1516 2.7 43.8 -120.3 1.3823 4.4 ------ UNKNOWN
211.8631 54.7760 2.8 47.0 -53.1 1.4382 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-15.168000 50.732600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9547 -15.6365 23.2 47.2 -167.2 0.1594 0.5 1.4 Sco X-1
254.5030 35.3724 15.3 12.0 -59.5 -0.1169 -0.8 2.9 Her X-1
262.9658 -24.7787 6.0 52.2 168.4 -1.4338 -1.9 3.1 GX 1+4
268.5184 -1.3342 5.9 28.9 158.7 -0.3748 -2.0 11.5 SW J1753.5-0127
270.3232 -25.1086 15.9 52.7 160.0 0.7278 0.7 2.8 GX 5-1
270.2967 -25.7521 20.9 53.3 160.1 0.6348 0.6 0.6 GRS 1758-258
274.1685 -13.9702 4.9 42.3 152.7 -0.8739 -2.4 10.3 GX 17+2
288.7566 10.9006 7.5 27.7 107.8 0.3744 1.5 3.6 GRS 1915+105
299.4993 35.3255 6.1 30.4 52.1 0.4430 1.9 8.7 Cyg X-1
308.0653 41.0414 20.2 37.7 43.4 0.1883 0.6 5.7 Cyg X-3
264.9710 -26.5733 3.4 53.9 166.1 3.2491 3.4 ------ UNKNOWN
264.1950 -25.2153 0.5 52.6 166.9 17.5565 22.4 ------ UNKNOWN
232.1049 42.1485 2.3 30.5 -66.4 1.1527 5.1 ------ UNKNOWN
201.6087 74.9628 2.2 56.9 -30.0 4.4756 5.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
118.332610 482.892000
660.832000 722.951800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9790 -15.6392 0.2 20.4 -67.3 27.2160 60.4 0.1 Sco X-1
256.1465 -37.7814 3.3 14.3 -155.1 1.2798 3.5 8.5 4U 1700-377
256.4141 -36.4451 3.4 13.1 -152.9 1.2685 3.4 1.7 GX 349+2
262.9704 -24.7552 5.3 1.2 -70.0 0.9124 2.2 2.2 GX 1+4
264.7343 -44.5253 5.6 19.3 177.2 0.7725 2.0 4.5 4U 1735-44
268.3620 -1.4666 2.7 24.1 8.6 1.9220 4.2 0.9 SW J1753.5-0127
270.3074 -25.1098 2.1 5.5 88.7 1.9486 5.3 2.2 GX 5-1
270.1361 -25.7501 6.0 5.4 95.4 0.7184 2.0 9.0 GRS 1758-258
273.9771 -14.0149 3.1 14.5 39.6 1.5253 3.7 2.1 GX 17+2
275.7615 -30.3713 5.2 11.5 117.8 0.8192 2.2 8.5 H1820-303
285.0980 -25.0563 3.0 18.9 92.4 1.8749 3.9 8.8 HT1900.1-2455
288.8436 11.0240 6.0 43.5 34.9 1.6838 1.9 5.4 GRS 1915+105
263.0092 -33.6853 5.3 8.5 -175.0 0.7943 2.2 9.0 GX 354-0
309.0895 -28.2987 3.0 40.0 103.1 6.1223 3.8 ------ UNKNOWN
304.9278 -20.3652 3.3 37.7 89.5 4.8147 3.4 ------ UNKNOWN
268.2991 -50.1315 3.2 25.1 172.1 1.6045 3.5 ------ UNKNOWN
259.7282 -82.0794 3.1 56.9 179.1 9.8392 3.7 ------ UNKNOWN
260.1485 27.6201 2.4 53.0 -6.2 4.9831 4.9 ------ UNKNOWN
251.4992 0.5910 2.8 28.6 -29.0 1.7189 4.1 ------ UNKNOWN
247.4027 7.9388 2.9 37.0 -30.1 2.1027 3.9 ------ UNKNOWN
200.4530 -73.5635 2.1 58.6 -164.4 13.4783 5.5 ------ UNKNOWN
Plot creation:
Sun May 31 03:02:16 EDT 2015