Click here for the BAT GCN circular template
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
184.4189 -37.0712 0.0204 48.3667 -144.0243 1.3000272 9.434 TRIG_00559132
Foreground time interval of the image:
-10.280 10.040 (delta_t = 20.320 [sec])
Background time interval of the image:
-239.176 -10.280 (delta_t = 228.896 [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 -10.280 sec. to 10.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75039 ( -0.255014 0.262697 )
Norm@50keV : 4.08684E-03 ( -0.000757801 0.000752675 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 98.46 using 59 PHA bins.
# Reduced chi-squared = 1.727 for 57 degrees of freedom
# Null hypothesis probability = 5.385711e-04
Photon flux (15-150 keV) in 20.32 sec: 0.552868 ( -0.0997188 0.100277 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.6581e-07 ( -1.44076e-07 1.46051e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -10.280 sec. to 10.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.05158 ( -1.7333 1.32986 )
Epeak [keV] : 52.0136 ( -8.00801 10.6001 )
Norm@50keV : 0.115584 ( -0.116907 0.777877 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.82 using 59 PHA bins.
# Reduced chi-squared = 1.461 for 56 degrees of freedom
# Null hypothesis probability = 1.380233e-02
Photon flux (15-150 keV) in 20.32 sec: 0.514605 ( -0.09618 0.098078 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.92902e-07 ( -1.30753e-07 7.50661e-08 ) ergs/cm2
Band function
Time interval is from -10.280 sec. to 10.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.08532 ( -0.85299 2.60788 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 51.8851 ( -7.91726 10.6932 )
Norm@50keV : 0.120650 ( -0.120641 0.394632 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.83 using 59 PHA bins.
# Reduced chi-squared = 1.488 for 55 degrees of freedom
# Null hypothesis probability = 1.094801e-02
Photon flux (15-150 keV) in 20.32 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.00613e-07 ( -7.00471e-07 -1.36886e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.3182 (-1.9686 2.25345)
R^2/D10^2 : 0.103428 (-0.0462304 0.0837072)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.17 using 59 PHA bins.
# Reduced chi-squared = 1.442 for 57 degrees of freedom
# Null hypothesis probability = 1.619430e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.901e-08 2.752e-08
25- 50 2.792e-07 6.766e-08
50-150 3.175e-07 1.199e-07
15-150 6.757e-07 1.575e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 96.2800 (-34.814 82.0386)
Norm : 2.58021 (-0.541612 0.66139)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.96 using 59 PHA bins.
# Reduced chi-squared = 1.613 for 57 degrees of freedom
# Null hypothesis probability = 2.298952e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.370e-07 3.330e-08
25- 50 2.351e-07 6.133e-08
50-150 3.727e-07 2.264e-07
15-150 7.448e-07 2.400e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.10787 (-7.28997 16.4895)
R1^2/D10^2 : 0.246552 (-0.244741 -0.244741)
kT2 [keV] : 14.9803 (-15.018 184.949)
R2^2/D10^2 : 5.67559E-02 (-0.0564959 0.115457)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.46 using 59 PHA bins.
# Reduced chi-squared = 1.481 for 55 degrees of freedom
# Null hypothesis probability = 1.174402e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.550e-08 5.856e-08
25- 50 2.733e-07 1.512e-07
50-150 3.385e-07 2.084e-07
15-150 7.073e-07 3.879e-07
Peak spectrum fit
Power-law model
Time interval is from 1.596 sec. to 2.596 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49095 ( -0.37959 0.387964 )
Norm@50keV : 1.39527E-02 ( -0.00352466 0.00351967 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.03 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 57 degrees of freedom
# Null hypothesis probability = 4.740418e-01
Photon flux (15-150 keV) in 1 sec: 1.73775 ( -0.45468 0.459316 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32551e-07 ( -3.49077e-08 3.52743e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.596 sec. to 2.596 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.632554 ( -3.09969 1.8281 )
Epeak [keV] : 65.8542 ( -16.7231 77.9372 )
Norm@50keV : 0.142560 ( -0.142559 3.88657 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.86 using 59 PHA bins.
# Reduced chi-squared = 0.9439 for 56 degrees of freedom
# Null hypothesis probability = 5.944558e-01
Photon flux (15-150 keV) in 1 sec: 1.61911 ( -0.45152 0.46589 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23685e-07 ( -3.56891e-08 3.7006e-08 ) ergs/cm2
Band function
Time interval is from 1.596 sec. to 2.596 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.633659 ( -1.42455 -0.181444 )
beta : -10.0000 ( 10 1.06581e-14 )
Epeak [keV] : 65.8356 ( -16.2957 77.9584 )
Norm@50keV : 0.142761 ( -0.142761 3.91392 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.86 using 59 PHA bins.
# Reduced chi-squared = 0.9611 for 55 degrees of freedom
# Null hypothesis probability = 5.567972e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23674e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.9936 (-3.52874 4.70668)
R^2/D10^2 : 0.174223 (-0.105861 0.245163)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.24 using 59 PHA bins.
# Reduced chi-squared = 0.9340 for 57 degrees of freedom
# Null hypothesis probability = 6.169698e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.215e-09 4.986e-09
25- 50 3.876e-08 1.545e-08
50-150 6.930e-08 3.365e-08
15-150 1.173e-07 5.097e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.352 (-117.773 -199.362)
Norm : 7.29672 (-1.80949 2.14328)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.81 using 59 PHA bins.
# Reduced chi-squared = 0.9792 for 57 degrees of freedom
# Null hypothesis probability = 5.196344e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.817e-08 1.104e-08
25- 50 3.495e-08 2.058e-08
50-150 7.665e-08 4.548e-08
15-150 1.298e-07 7.855e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.39913 (-9.46496 -9.46496)
R1^2/D10^2 : 0.392949 (-0.37786 -0.37786)
kT2 [keV] : 19.8065 (-20.0529 -20.0529)
R2^2/D10^2 : 6.17747E-02 (-0.0560323 0.331013)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.77 using 59 PHA bins.
# Reduced chi-squared = 0.9594 for 55 degrees of freedom
# Null hypothesis probability = 5.604663e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.159e-08 9.530e-09
25- 50 3.889e-08 3.448e-08
50-150 7.422e-08 5.730e-08
15-150 1.247e-07 1.107e-07
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: 1.75039 ( -0.255014 0.262697 )
Norm@50keV : 4.08684E-03 ( -0.000757801 0.000752675 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 98.46 using 59 PHA bins.
# Reduced chi-squared = 1.727 for 57 degrees of freedom
# Null hypothesis probability = 5.385711e-04
Photon flux (15-150 keV) in 20.32 sec: 0.552868 ( -0.0997188 0.100277 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.6581e-07 ( -1.44076e-07 1.46051e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.05158 ( -1.7333 1.32986 )
Epeak [keV] : 52.0136 ( -8.00801 10.6001 )
Norm@50keV : 0.115584 ( -0.116907 0.777877 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.82 using 59 PHA bins.
# Reduced chi-squared = 1.461 for 56 degrees of freedom
# Null hypothesis probability = 1.380233e-02
Photon flux (15-150 keV) in 20.32 sec: 0.514605 ( -0.09618 0.098078 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.92902e-07 ( -1.30753e-07 7.50661e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.08532 ( -0.85299 2.60788 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 51.8851 ( -7.91726 10.6932 )
Norm@50keV : 0.120650 ( -0.120641 0.394632 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.83 using 59 PHA bins.
# Reduced chi-squared = 1.488 for 55 degrees of freedom
# Null hypothesis probability = 1.094801e-02
Photon flux (15-150 keV) in 20.32 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.00613e-07 ( -7.00471e-07 -1.36886e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 2.12e-07
S(50-100 keV) = 2.51e-07
T90 vs. Hardness ratio plot
T90 = 18.0480000376701 sec.
Hardness ratio (energy fluence ratio) = 1.18396
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 3.21952
Count Ratio (50-100 keV) / (15-25 keV) = 2.10714
Mask shadow pattern
IMX = -9.104329731323985E-01, IMY = 6.608788957985384E-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:
-239.176000 -10.280000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9831 -15.6454 0.3 17.7 101.9 11.3510 42.1 0.4 Sco X-1
254.3750 35.2889 6.0 50.8 16.1 1.8119 1.9 5.2 Her X-1
255.8822 -37.8712 8.0 38.1 131.9 0.8678 1.4 5.2 4U 1700-377
256.2576 -36.4579 4.0 37.4 129.8 1.7294 2.9 8.8 GX 349+2
262.9128 -24.7268 4.3 36.6 108.1 1.7730 2.7 5.4 GX 1+4
263.0826 -33.7688 5.6 40.5 121.2 -1.8798 -2.1 6.1 GX 354-0
226.2139 7.2677 3.0 16.5 -18.4 0.8877 3.8 ------ UNKNOWN
209.0932 -26.5055 3.4 25.1 -148.0 0.9356 3.4 ------ UNKNOWN
190.1610 -38.4027 3.2 44.9 -148.5 1.6690 3.6 ------ UNKNOWN
179.8869 -54.8989 3.8 59.5 -161.7 6.4148 3.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-10.280000 10.040000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9368 -15.6251 4.3 17.6 101.8 -0.1686 -2.7 2.6 Sco X-1
254.5279 35.2993 316.6 50.9 16.3 0.0080 0.0 4.3 Her X-1
256.1160 -37.8709 6.2 38.2 131.7 -0.2496 -1.9 6.3 4U 1700-377
256.4626 -36.2872 16.4 37.4 129.4 0.0902 0.7 8.3 GX 349+2
262.9384 -24.8347 4.7 36.6 108.3 -0.3564 -2.5 6.6 GX 1+4
263.0002 -33.7067 6.9 40.4 121.2 0.3302 1.7 7.7 GX 354-0
267.6754 0.2295 2.0 40.4 67.2 1.1895 5.7 ------ UNKNOWN
184.4194 -37.0728 1.2 48.4 -144.0 1.2908 9.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
150.924590 707.724600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9697 -15.6373 0.3 34.0 155.5 29.5518 35.2 0.6 Sco X-1
256.0690 -37.8508 6.8 36.9 113.2 2.5300 1.7 3.9 4U 1700-377
256.4112 -36.3488 4.5 35.5 114.5 3.3708 2.5 4.6 GX 349+2
263.0512 -24.9060 2.7 23.2 121.2 2.6471 4.3 9.9 GX 1+4
264.7079 -44.5980 7.7 39.3 98.5 -2.8196 -1.5 9.0 4U 1735-44
268.2345 -1.5834 5.3 11.8 -159.3 1.1389 2.2 11.2 SW J1753.5-0127
270.2413 -25.0958 3.5 19.6 106.1 2.0580 3.3 2.5 GX 5-1
270.3764 -25.6034 7.8 20.0 105.1 0.9471 1.5 9.3 GRS 1758-258
273.9956 -14.0102 2.1 8.2 116.4 2.8207 5.5 1.7 GX 17+2
275.9528 -30.4084 10.0 23.3 88.7 0.8751 1.2 2.9 H1820-303
285.2128 -24.7833 0.0 18.7 64.0 1.1286 2.0 12.7 HT1900.1-2455
288.7947 10.9000 1.7 20.7 -68.0 5.0157 6.9 2.7 GRS 1915+105
262.9964 -33.8347 16.9 30.3 109.2 0.7297 0.7 0.4 GX 354-0
244.1571 -35.7327 2.8 42.5 125.7 9.5113 4.1 ------ UNKNOWN
319.5209 5.9803 3.5 42.8 -24.1 3.0330 3.3 ------ UNKNOWN
225.4690 19.4029 4.8 58.7 -159.3 9.6560 2.4 ------ UNKNOWN
320.4225 22.7505 4.2 50.6 -44.6 11.1802 2.8 ------ UNKNOWN
258.2225 33.7426 2.7 45.3 -121.3 12.0177 4.4 ------ UNKNOWN
272.7144 34.1488 3.0 41.7 -104.6 11.8712 3.8 ------ UNKNOWN
244.0700 31.7304 2.8 51.1 -135.6 13.6699 4.1 ------ UNKNOWN
Plot creation:
Sat May 30 16:15:09 EDT 2015