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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
291.8017 -65.3995 0.0190 36.6060 169.2671 0.4611118 10.063 TRIG_00613775
Foreground time interval of the image:
0.428 8.696 (delta_t = 8.268 [sec])
Background time interval of the image:
-239.968 0.428 (delta_t = 240.396 [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
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
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 0.428 sec. to 8.696 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81761 ( -0.294043 0.302022 )
Norm@50keV : 3.52682E-03 ( -0.000632374 0.000617518 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.64 using 59 PHA bins.
# Reduced chi-squared = 0.9937 for 57 degrees of freedom
# Null hypothesis probability = 4.885215e-01
Photon flux (15-150 keV) in 8.268 sec: 0.489347 ( -0.0818898 0.082222 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.68297e-07 ( -4.79435e-08 4.86682e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.428 sec. to 8.696 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82613 ( -0.999302 1.00416 )
Epeak [keV] : 9998.92 ( )
Norm@50keV : 3.49364E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.64 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 56 degrees of freedom
# Null hypothesis probability = 4.508435e-01
Photon flux (15-150 keV) in 8.268 sec: 0.489974 ( -0.082667 0.081393 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.6738e-07 ( -5.04662e-08 4.90607e-08 ) ergs/cm2
Band function
Time interval is from 0.428 sec. to 8.696 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94443 ( -14.292 -4.94443 )
beta : -2.05407 ( -0.305508 0.377406 )
Epeak [keV] : 25.5315 ( -9.05817 5.73468 )
Norm@50keV : 410.694 ( -65.4822 7194.86 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.76 using 59 PHA bins.
# Reduced chi-squared = 0.9775 for 55 degrees of freedom
# Null hypothesis probability = 5.220521e-01
Photon flux (15-150 keV) in 8.268 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] : 9.80775 (-1.84558 2.55685)
R^2/D10^2 : 0.244320 (-0.144744 0.309891)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.11 using 59 PHA bins.
# Reduced chi-squared = 1.195 for 57 degrees of freedom
# Null hypothesis probability = 1.488435e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.930e-08 1.296e-08
25- 50 9.504e-08 2.548e-08
50-150 4.688e-08 2.104e-08
15-150 1.812e-07 5.101e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.4244 (-44.761 -99.4391)
Norm : 2.14658 (-0.474692 0.69171)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.69 using 59 PHA bins.
# Reduced chi-squared = 1.012 for 57 degrees of freedom
# Null hypothesis probability = 4.494835e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.639e-08 9.938e-09
25- 50 8.012e-08 1.831e-08
50-150 1.294e-07 7.362e-08
15-150 2.559e-07 9.822e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.43917 (-1.65352 1.9828)
R1^2/D10^2 : 0.623823 (-0.371217 0.990499)
kT2 [keV] : 58.0380 (-33.1946 -58.038)
R2^2/D10^2 : 4.78951E-04 (-0.000442352 0.00492202)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.51 using 59 PHA bins.
# Reduced chi-squared = 0.9365 for 55 degrees of freedom
# Null hypothesis probability = 6.088429e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.993e-08 2.547e-08
25- 50 8.437e-08 4.024e-08
50-150 1.502e-07 7.986e-08
15-150 2.845e-07 1.262e-07
Peak spectrum fit
Power-law model
Time interval is from 7.696 sec. to 8.696 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.26778 ( -0.461914 0.52304 )
Norm@50keV : 5.29515E-03 ( -0.00191462 0.00187971 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.89 using 59 PHA bins.
# Reduced chi-squared = 1.209 for 57 degrees of freedom
# Null hypothesis probability = 1.344005e-01
Photon flux (15-150 keV) in 1 sec: 0.909062 ( -0.243659 0.243801 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.03192e-08 ( -1.52441e-08 1.60157e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.696 sec. to 8.696 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.570234 ( 0.613919 2.51817 )
Epeak [keV] : 28.6080 ( )
Norm@50keV : 0.446358 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.18 using 59 PHA bins.
# Reduced chi-squared = 1.182 for 56 degrees of freedom
# Null hypothesis probability = 1.657153e-01
Photon flux (15-150 keV) in 1 sec: 0.867924 ( -0.119764 0.238656 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.87869e-08 ( -1.51005e-08 1.70466e-08 ) ergs/cm2
Band function
Time interval is from 7.696 sec. to 8.696 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.681 -5 )
beta : -3.04189 ( -2.54004 0.807956 )
Epeak [keV] : 24.3139 ( -4.59449 5.14271 )
Norm@50keV : 1565.66 ( -388.81 4844.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.89 using 59 PHA bins.
# Reduced chi-squared = 1.143 for 55 degrees of freedom
# Null hypothesis probability = 2.170960e-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] : 7.26292 (-1.674 2.25569)
R^2/D10^2 : 1.57847 (-1.07171 3.15918)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.27 using 59 PHA bins.
# Reduced chi-squared = 1.163 for 57 degrees of freedom
# Null hypothesis probability = 1.875258e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.388e-08 8.235e-09
25- 50 2.039e-08 1.055e-08
50-150 3.854e-09 3.126e-09
15-150 3.812e-08 2.321e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 36.4512 (-15.9764 41.2386)
Norm : 6.43857 (-2.64985 4.68032)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.36 using 59 PHA bins.
# Reduced chi-squared = 1.182 for 57 degrees of freedom
# Null hypothesis probability = 1.638266e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.430e-08 4.994e-09
25- 50 1.804e-08 8.555e-09
50-150 1.257e-08 9.502e-09
15-150 4.490e-08 2.054e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.83313 (-5.1482 1.91377)
R1^2/D10^2 : 1.96381 (-1.03718 4.08807)
kT2 [keV] : 200.000 ( )
R2^2/D10^2 : 5.53143E-05 (-5.5316e-05 -5.5316e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.04 using 59 PHA bins.
#Fit statistic : Chi-Squared = 64.02 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 55 degrees of freedom
# Reduced chi-squared = 1.164 for 55 degrees of freedom
# Null hypothesis probability = 1.889689e-01
# Null hypothesis probability = 1.895703e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.406e-08 8.460e-09
25- 50 1.974e-08 1.188e-08
50-150 1.723e-08 3.118e-09
15-150 5.103e-08 2.196e-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: 1.81761 ( -0.294043 0.302022 )
Norm@50keV : 3.52682E-03 ( -0.000632374 0.000617518 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.64 using 59 PHA bins.
# Reduced chi-squared = 0.9937 for 57 degrees of freedom
# Null hypothesis probability = 4.885215e-01
Photon flux (15-150 keV) in 8.268 sec: 0.489347 ( -0.0818898 0.082222 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.68297e-07 ( -4.79435e-08 4.86682e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82613 ( -0.999302 1.00416 )
Epeak [keV] : 9998.92 ( )
Norm@50keV : 3.49364E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.64 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 56 degrees of freedom
# Null hypothesis probability = 4.508435e-01
Photon flux (15-150 keV) in 8.268 sec: 0.489974 ( -0.082667 0.081393 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.6738e-07 ( -5.04662e-08 4.90607e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94443 ( -13.8474 -4.94443 )
beta : -2.05407 ( -0.305508 0.377406 )
Epeak [keV] : 25.5315 ( -9.08046 5.73495 )
Norm@50keV : 410.694 ( -65.4822 7194.86 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.76 using 59 PHA bins.
# Reduced chi-squared = 0.9775 for 55 degrees of freedom
# Null hypothesis probability = 5.220521e-01
Photon flux (15-150 keV) in 8.268 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) = 7.60e-08
S(50-100 keV) = 8.63e-08
T90 vs. Hardness ratio plot
T90 = 6.25599998235703 sec.
Hardness ratio (energy fluence ratio) = 1.13553
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.41088
Count Ratio (50-100 keV) / (15-25 keV) = 0.741713
Mask shadow pattern
IMX = -7.298330504303442E-01, IMY = -1.383374533288296E-01
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
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:
-239.968000 0.428000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9886 -15.6296 0.3 25.6 -48.2 11.2352 41.8 0.8 Sco X-1
255.9900 -37.8484 0.5 10.3 -119.7 5.6040 25.0 0.3 4U 1700-377
256.3797 -36.4412 1.5 9.4 -113.2 1.6842 7.6 2.9 GX 349+2
263.1750 -24.7642 6.5 8.0 -15.9 0.4126 1.8 9.1 GX 1+4
264.7029 -44.4832 3.4 12.4 -167.3 0.8021 3.4 2.6 4U 1735-44
268.4217 -1.5225 4.5 30.7 10.3 0.6926 2.6 5.3 SW J1753.5-0127
270.4454 -25.0485 7.0 7.9 33.4 0.4038 1.7 9.0 GX 5-1
270.4517 -25.6356 6.0 7.4 35.3 0.5312 2.2 10.3 GRS 1758-258
273.9412 -14.0737 2.5 19.3 28.8 1.1057 4.5 4.4 GX 17+2
275.8878 -30.3605 3.1 8.2 86.3 0.8113 3.8 2.0 H1820-303
285.0115 -25.0454 8.3 17.7 77.6 0.4080 1.4 7.6 HT1900.1-2455
288.8601 10.9132 3.2 48.1 36.7 3.7674 3.6 4.1 GRS 1915+105
262.9227 -33.8069 2.2 3.4 -112.8 1.1870 5.3 3.7 GX 354-0
323.0870 -46.8759 3.3 45.0 132.8 3.5665 3.5 ------ UNKNOWN
287.0729 -7.6587 2.4 31.1 49.0 1.9031 4.8 ------ UNKNOWN
266.5565 -32.2221 1.6 0.1 158.8 1.8419 7.4 ------ UNKNOWN
218.4658 -29.9756 3.5 40.9 -93.5 3.6897 3.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.428000 8.696000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9499 -15.7825 7.8 25.5 -48.6 0.0545 1.5 8.7 Sco X-1
255.8409 -37.9567 5.3 10.5 -119.9 0.0656 2.2 9.7 4U 1700-377
256.6241 -36.5174 3.2 9.3 -114.1 0.1072 3.6 10.7 GX 349+2
262.8594 -24.9079 0.0 7.9 -18.2 0.0133 0.4 12.7 GX 1+4
264.5452 -44.5136 3.4 12.4 -166.8 -0.1072 -3.4 9.3 4U 1735-44
268.4772 -1.3114 6.4 30.9 10.4 0.0711 1.8 10.7 SW J1753.5-0127
270.2637 -24.9307 10.5 7.9 31.9 0.0345 1.1 9.0 GX 5-1
270.1981 -25.9077 3.7 7.0 34.7 -0.0984 -3.1 11.4 GRS 1758-258
274.0395 -14.0634 197.7 19.4 29.1 -0.0020 -0.1 2.5 GX 17+2
275.7867 -30.3815 8.7 8.1 86.3 -0.0431 -1.3 7.2 H1820-303
285.0039 -24.9861 4.1 17.7 77.4 -0.1064 -2.8 4.3 HT1900.1-2455
288.7461 10.8103 28.0 47.9 36.6 -0.0585 -0.4 8.7 GRS 1915+105
262.8237 -33.9959 0.0 3.6 -114.9 -0.0741 -2.3 12.7 GX 354-0
291.8019 -65.3994 1.1 36.6 169.3 0.4612 10.1 ------ UNKNOWN
287.1856 -63.9899 2.3 34.3 170.7 0.2186 5.1 ------ UNKNOWN
288.2671 -84.2429 2.5 52.5 -176.1 0.4137 4.7 ------ UNKNOWN
250.6190 -15.2445 2.4 22.3 -37.6 0.1582 4.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
106.532600 907.032600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3076 -60.6240 25.6 46.8 -127.5 0.9449 0.5 0.2 Cen X-3
186.6624 -62.7027 6.2 40.7 -119.8 2.7069 1.9 4.1 GX 301-2
256.0467 -37.8483 1.9 34.5 -37.3 3.7856 6.2 2.9 4U 1700-377
256.5804 -36.4940 3.6 35.5 -35.6 1.9595 3.2 8.2 GX 349+2
263.1685 -24.6059 5.6 44.7 -20.9 1.7115 2.1 12.1 GX 1+4
264.6876 -44.5405 3.5 25.6 -31.4 1.5362 3.3 5.9 4U 1735-44
270.1590 -25.0928 3.9 42.6 -12.2 2.0715 3.0 6.9 GX 5-1
270.3238 -25.7260 3.3 41.9 -12.2 2.3030 3.6 1.5 GRS 1758-258
274.0190 -14.0382 4.0 52.7 -4.5 3.8626 2.9 0.8 GX 17+2
275.9545 -30.3795 3.1 36.3 -6.1 2.5329 3.7 1.7 H1820-303
285.0677 -25.0118 2.4 40.6 8.0 3.4140 4.9 5.7 HT1900.1-2455
263.0238 -33.8247 1.8 36.0 -25.6 3.9697 6.5 1.8 GX 354-0
352.2002 -41.9700 3.6 40.4 102.5 8.7184 3.2 ------ UNKNOWN
50.7755 -56.7895 3.5 49.4 158.3 6.0305 3.3 ------ UNKNOWN
82.4010 -65.7986 3.6 47.1 -178.5 3.3546 3.2 ------ UNKNOWN
94.4015 -68.0319 2.8 46.0 -171.5 4.0806 4.0 ------ UNKNOWN
266.5738 -32.2264 1.5 36.5 -19.9 4.5187 7.6 ------ UNKNOWN
261.2762 -11.2843 2.5 58.0 -18.6 9.9115 4.6 ------ UNKNOWN
Plot creation:
Thu May 28 14:19:49 EDT 2015