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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
263.1484 29.8221 0.0273 19.1453 39.8779 0.5109228 7.017 TRIG_00231702
Foreground time interval of the image:
-4.712 35.773 (delta_t = 40.485 [sec])
Background time interval of the image:
-230.227 -4.712 (delta_t = 225.515 [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 -4.712 sec. to 556.120 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91477 ( -0.4036 0.45473 )
Norm@50keV : 1.68008E-04 ( -4.75108e-05 4.42474e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.36 using 59 PHA bins.
# Reduced chi-squared = 0.5852 for 57 degrees of freedom
# Null hypothesis probability = 9.947809e-01
Photon flux (15-150 keV) in 560.8 sec: 2.42635E-02 ( -0.00486043 0.00486055 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.66363e-07 ( -2.25137e-07 2.37248e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.712 sec. to 556.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.49440 ( )
Epeak [keV] : 172.648 ( )
Norm@50keV : 8.58916E-05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.77 using 59 PHA bins.
# Reduced chi-squared = 0.5853 for 56 degrees of freedom
# Null hypothesis probability = 9.944101e-01
Photon flux (15-150 keV) in 560.8 sec: 2.42518E-02 ( -0.0048575 0.0048577 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.6403e-07 ( -1.1216e-07 2.32121e-07 ) ergs/cm2
Band function
Time interval is from -4.712 sec. to 556.120 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.51227 ( 1.51227 1.51227 )
beta : -1.91473 ( 1.91474 0.403309 )
Epeak [keV] : 13.2071 ( -13.2037 -13.2037 )
Norm@50keV : 4.63880E-04 ( -0.000463898 278.074 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.36 using 59 PHA bins.
# Reduced chi-squared = 0.6065 for 55 degrees of freedom
# Null hypothesis probability = 9.907303e-01
Photon flux (15-150 keV) in 560.8 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] : 8.52654 (-2.4814 4.14074)
R^2/D10^2 : 1.93819E-02 (-0.0146758 0.0547049)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.15 using 59 PHA bins.
# Reduced chi-squared = 0.7921 for 57 degrees of freedom
# Null hypothesis probability = 8.716562e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.492e-07 6.729e-08
25- 50 2.908e-07 1.150e-07
50-150 9.379e-08 5.640e-08
15-150 5.338e-07 2.342e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 85.2116 (-46.7084 -85.2746)
Norm : 0.110415 (-0.028334 0.0502495)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.06 using 59 PHA bins.
# Reduced chi-squared = 0.6150 for 57 degrees of freedom
# Null hypothesis probability = 9.902584e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.612e-07 4.649e-08
25- 50 2.694e-07 1.092e-07
50-150 3.964e-07 2.823e-07
15-150 8.270e-07 4.488e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.01578 (-1.69964 2.21909)
R1^2/D10^2 : 0.129681 (-0.0993234 0.707696)
kT2 [keV] : 27.4743 (-11.9156 59.9943)
R2^2/D10^2 : 2.32303E-04 (-0.000219701 0.00065082)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.10 using 59 PHA bins.
# Reduced chi-squared = 0.5835 for 55 degrees of freedom
# Null hypothesis probability = 9.942326e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.953e-07 1.119e-07
25- 50 2.142e-07 1.134e-07
50-150 5.333e-07 3.261e-07
15-150 9.428e-07 5.246e-07
Peak spectrum fit
Power-law model
Time interval is from 2.692 sec. to 3.692 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27108 ( -0.598421 0.588063 )
Norm@50keV : 3.72130E-03 ( -0.00104537 0.00104435 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.69 using 59 PHA bins.
# Reduced chi-squared = 1.047 for 57 degrees of freedom
# Null hypothesis probability = 3.782845e-01
Photon flux (15-150 keV) in 1 sec: 0.441680 ( -0.129119 0.129884 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.70378e-08 ( -1.17265e-08 1.19592e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.692 sec. to 3.692 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29548 ( -0.625887 0.570685 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.70719E-03 ( -0.00105137 0.0148156 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.70 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 56 degrees of freedom
# Null hypothesis probability = 3.427555e-01
Photon flux (15-150 keV) in 1 sec: 0.444436 ( -0.131423 0.125479 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.70359e-08 ( -1.17257e-08 1.16505e-08 ) ergs/cm2
Band function
Time interval is from 2.692 sec. to 3.692 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.02625 ( 1.02812 1.02812 )
beta : -1.27022 ( 1.27098 0.598375 )
Epeak [keV] : 46.7879 ( -45.45 -45.45 )
Norm@50keV : 6.76620E-03 ( -0.00409737 0.641007 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.69 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 55 degrees of freedom
# Null hypothesis probability = 3.092775e-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] : 19.9829 (-6.98968 13.6442)
R^2/D10^2 : 1.92428E-02 (-0.0191259 0.0604073)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.05 using 59 PHA bins.
# Reduced chi-squared = 1.124 for 57 degrees of freedom
# Null hypothesis probability = 2.430120e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.482e-09 9.520e-10
25- 50 7.377e-09 4.513e-09
50-150 2.183e-08 1.410e-08
15-150 3.069e-08 1.901e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-113.777 -199.363)
Norm : 1.82311 (-0.521374 0.521391)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.94 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 57 degrees of freedom
# Null hypothesis probability = 3.362579e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.540e-09 2.822e-09
25- 50 8.733e-09 5.410e-09
50-150 1.915e-08 1.163e-08
15-150 3.243e-08 1.937e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.93364 (-1.29371 1.87132)
R1^2/D10^2 : 485.845 (-484.007 0)
kT2 [keV] : 23.7121 (-8.42511 20.8489)
R2^2/D10^2 : 1.06457E-02 (-0.0089387 0.0292744)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.25 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 55 degrees of freedom
# Null hypothesis probability = 3.914904e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.372e-09 2.322e-09
25- 50 5.972e-09 3.493e-09
50-150 2.472e-08 1.588e-08
15-150 3.507e-08 2.032e-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: 1.55803 ( -0.312501 0.323869 )
Norm@50keV : 9.39012E-04 ( -0.000167599 0.000164082 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.37 using 59 PHA bins.
# Reduced chi-squared = 0.6732 for 57 degrees of freedom
# Null hypothesis probability = 9.724160e-01
Photon flux (15-150 keV) in 40.48 sec: 0.119152 ( -0.0201042 0.0201604 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.57432e-07 ( -6.89111e-08 7.04838e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.21337 ( )
Epeak [keV] : 79.0669 ( )
Norm@50keV : 4.35231E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.29 using 59 PHA bins.
# Reduced chi-squared = 0.6837 for 56 degrees of freedom
# Null hypothesis probability = 9.661847e-01
Photon flux (15-150 keV) in 40.48 sec: 0.119132 ( -0.0208993 0.020098 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.57376e-07 ( -3.93644e-08 7.01652e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.42325 ( 1.64499 2.42325 )
beta : -1.55808 ( -0.323727 0.313144 )
Epeak [keV] : 114.961 ( -114.961 -114.961 )
Norm@50keV : 0.127624 ( -0.0227777 0.0223026 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.37 using 59 PHA bins.
# Reduced chi-squared = 0.6977 for 55 degrees of freedom
# Null hypothesis probability = 9.568884e-01
Photon flux (15-150 keV) in 40.48 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) = 2.54e-07
S(50-100 keV) = 2.69e-07
T90 vs. Hardness ratio plot
T90 = 552.960000008345 sec.
Hardness ratio (energy fluence ratio) = 1.05906
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.959047
Count Ratio (50-100 keV) / (15-25 keV) = 0.66233
Mask shadow pattern
IMX = 2.664206550830084E-01, IMY = -2.225879905399725E-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:
-230.227410 -4.712000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9864 -15.6404 0.3 29.6 -144.2 8.0353 37.7 0.4 Sco X-1
254.2981 35.3622 10.9 23.0 16.1 0.1950 1.1 7.9 Her X-1
255.9814 -37.8355 996.2 50.2 -164.7 -0.0054 -0.0 0.6 4U 1700-377
256.2407 -36.3257 9.7 48.7 -165.0 -0.4588 -1.2 11.1 GX 349+2
262.9544 -24.7968 2.8 38.1 -175.6 1.0678 4.1 4.3 GX 1+4
264.7383 -44.3249 4.0 57.5 -171.8 2.7040 3.0 7.5 4U 1735-44
268.4029 -1.4588 7.4 19.5 151.1 0.2784 1.6 2.1 SW J1753.5-0127
270.3331 -25.0563 2.2 40.5 174.5 1.5342 5.3 3.0 GX 5-1
270.4112 -25.7029 3.5 41.1 174.8 0.9792 3.3 6.3 GRS 1758-258
274.1219 -13.9522 11.4 32.7 159.9 0.2619 1.0 8.4 GX 17+2
275.8310 -30.4553 6.5 47.5 171.7 0.7333 1.8 7.2 H1820-303
284.9121 -24.9152 7.7 47.6 158.5 0.8643 1.5 6.7 HT1900.1-2455
288.7957 10.9396 1.0 33.5 105.6 4.4920 11.7 0.4 GRS 1915+105
262.9189 -33.8430 3.0 46.9 -172.7 1.2888 3.9 3.5 GX 354-0
252.1968 63.4480 2.7 51.1 15.4 2.5901 4.3 ------ UNKNOWN
247.0822 41.9428 2.9 30.3 5.6 0.8038 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-4.712000 35.772600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9187 -15.6608 4.3 29.6 -144.1 0.1925 2.7 3.7 Sco X-1
254.4317 35.4269 10.6 23.0 16.4 -0.0717 -1.1 5.2 Her X-1
256.1068 -37.8167 11.1 50.2 -164.8 -0.1595 -1.0 5.9 4U 1700-377
256.4994 -36.5178 4.5 48.9 -165.3 0.3543 2.6 6.5 GX 349+2
262.9452 -24.8649 8.5 38.1 -175.5 -0.1167 -1.4 8.0 GX 1+4
264.8343 -44.5862 12.6 57.7 -171.8 -0.3639 -1.0 9.1 4U 1735-44
268.4127 -1.3883 6.5 19.4 151.0 0.1232 1.8 4.7 SW J1753.5-0127
270.3712 -25.0842 3.4 40.5 174.5 -0.3494 -3.4 4.7 GX 5-1
270.4168 -25.6920 6.0 41.1 174.8 -0.2024 -1.9 6.9 GRS 1758-258
273.8727 -14.0523 28.8 32.6 160.3 -0.0365 -0.4 7.8 GX 17+2
275.9224 -30.3355 14.5 47.4 171.5 -0.1152 -0.8 1.9 H1820-303
284.9237 -24.9665 16.0 47.6 158.5 -0.1386 -0.7 6.7 HT1900.1-2455
288.6339 11.0399 0.0 33.3 105.5 0.0661 0.5 11.2 GRS 1915+105
262.8931 -33.7750 3.3 46.8 -172.7 -0.4360 -3.5 6.0 GX 354-0
275.1899 16.6868 2.5 20.4 92.1 0.3572 4.7 ------ UNKNOWN
263.1483 29.8221 1.6 19.1 39.9 0.5110 7.0 ------ UNKNOWN
245.6796 -42.3231 2.5 55.3 -155.2 1.1121 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
76.372600 962.512000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9778 -15.6339 0.7 48.7 -147.7 22.7351 15.7 0.4 Sco X-1
254.4841 35.1942 8.1 9.1 -42.7 0.8270 1.4 9.0 Her X-1
263.1113 -24.7485 9.4 54.6 -171.2 -2.6282 -1.2 5.6 GX 1+4
268.4033 -1.4664 2.4 31.7 178.8 2.8362 4.8 2.3 SW J1753.5-0127
270.1888 -25.0795 50.8 55.3 -179.0 -0.4754 -0.2 5.2 GX 5-1
270.2448 -25.7429 117.3 56.0 -178.9 -0.2191 -0.1 3.1 GRS 1758-258
273.9924 -13.9624 6.0 45.0 173.8 2.3372 1.9 4.5 GX 17+2
288.7876 10.9387 0.5 30.4 131.8 18.2218 21.6 0.8 GRS 1915+105
299.5990 35.2053 0.3 31.0 79.1 36.4657 38.5 0.5 Cyg X-1
308.1009 40.9454 18.2 37.8 69.2 -1.1038 -0.6 0.6 Cyg X-3
263.5990 4.4521 2.8 25.4 -172.2 2.2977 4.2 ------ UNKNOWN
236.7991 18.8725 3.4 26.3 -99.8 2.7233 3.4 ------ UNKNOWN
184.5218 62.8625 4.0 58.6 -22.8 15.6554 2.9 ------ UNKNOWN
206.2246 39.6559 4.7 47.0 -53.1 9.0517 2.5 ------ UNKNOWN
235.3745 -13.6152 5.9 51.0 -135.6 6.2070 2.0 ------ UNKNOWN
227.2178 3.3394 4.0 43.1 -112.2 8.5514 2.9 ------ UNKNOWN
Plot creation:
Sun May 31 11:51:25 EDT 2015