Click here for the BAT GCN circular template
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
272.1598 -20.4109 0.0089 14.4 -9.3 0.1704 21.7 TRIG_00597570
------------------------------------------
Foreground time interval of the image:
-0.020 0.224 (delta_t = 0.244 [sec])
Background time interval of the image:
-48.115 -0.020 (delta_t = 48.095 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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 0.016000
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 0.016000
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 0.016000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
The mask-weighted light curves based on cleaned DPHs
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.020 sec. to 0.224 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.36009 ( -0.131364 0.137451 )
Norm@50keV : 3.28501E-02 ( -0.00320912 0.00316494 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.94 using 59 PHA bins.
# Reduced chi-squared = 1.297 for 57 degrees of freedom
# Null hypothesis probability = 6.511500e-02
Photon flux (15-150 keV) in 0.244 sec: 5.93914 ( -0.462722 0.463162 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.7509e-08 ( -6.38165e-09 6.41537e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.020 sec. to 0.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.922874 ( -0.954103 0.76146 )
Epeak [keV] : 29.1836 ( -11.3918 5.0993 )
Norm@50keV : 0.241590 ( -0.24209 0.700653 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.32 using 59 PHA bins.
# Reduced chi-squared = 1.095 for 56 degrees of freedom
# Null hypothesis probability = 2.912472e-01
Photon flux (15-150 keV) in 0.244 sec: 5.75778 ( -0.47345 0.47358 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.11843e-08 ( -6.68877e-09 6.98865e-09 ) ergs/cm2
Band function
Time interval is from -0.020 sec. to 0.224 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.733982 ( -1.24098 -0.0240555 )
beta : -2.95576 ( -1.18179 0.40867 )
Epeak [keV] : 28.6908 ( -4.28434 4.16381 )
Norm@50keV : 3.52169 ( -3.43131 2079.83 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.74 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 55 degrees of freedom
# Null hypothesis probability = 3.744377e-01
Photon flux (15-150 keV) in 0.244 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] : 8.48949 (-0.608909 0.653785)
R^2/D10^2 : 5.29911 (-1.4216 1.93361)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.24 using 59 PHA bins.
# Reduced chi-squared = 1.337 for 57 degrees of freedom
# Null hypothesis probability = 4.529001e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.755e-08 2.180e-09
25- 50 3.396e-08 2.855e-09
50-150 1.080e-08 2.262e-09
15-150 6.231e-08 5.295e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 40.2402 (-6.13564 7.68224)
Norm : 38.8270 (-5.33631 6.18364)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.92 using 59 PHA bins.
# Reduced chi-squared = 1.086 for 57 degrees of freedom
# Null hypothesis probability = 3.049717e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.180e-08 2.080e-09
25- 50 2.875e-08 2.391e-09
50-150 2.239e-08 4.717e-09
15-150 7.294e-08 6.112e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.91249 (-1.4185 1.07613)
R1^2/D10^2 : 10.3138 (-4.06184 10.4333)
kT2 [keV] : 21.4749 (-8.42293 25.0769)
R2^2/D10^2 : 4.96106E-02 (-0.0461754 0.470842)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.46 using 59 PHA bins.
# Reduced chi-squared = 1.063 for 55 degrees of freedom
# Null hypothesis probability = 3.495460e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.011e-08 3.935e-09
25- 50 3.092e-08 6.256e-09
50-150 2.277e-08 1.040e-08
15-150 7.380e-08 1.869e-08
Peak spectrum fit
Power-law model
Time interval is from -0.396 sec. to 0.604 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.17602 ( -0.18226 0.19109 )
Norm@50keV : 9.90878E-03 ( -0.00131935 0.00129889 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.21 using 59 PHA bins.
# Reduced chi-squared = 1.039 for 57 degrees of freedom
# Null hypothesis probability = 3.948015e-01
Photon flux (15-150 keV) in 1 sec: 1.62004 ( -0.167671 0.167768 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.28606e-08 ( -1.08963e-08 1.10785e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.396 sec. to 0.604 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.642814 ( -1.36833 1.03128 )
Epeak [keV] : 33.2822 ( -11.0313 6.59167 )
Norm@50keV : 8.65075E-02 ( -0.0865467 0.541406 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.97 using 59 PHA bins.
# Reduced chi-squared = 0.9280 for 56 degrees of freedom
# Null hypothesis probability = 6.282389e-01
Photon flux (15-150 keV) in 1 sec: 1.55410 ( -0.17191 0.17259 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.12329e-08 ( -1.10782e-08 1.24601e-08 ) ergs/cm2
Band function
Time interval is from -0.396 sec. to 0.604 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.547419 ( -1.40418 -0.0423218 )
beta : -2.86155 ( 2.89851 0.577267 )
Epeak [keV] : 30.7903 ( -7.95187 6.46138 )
Norm@50keV : 0.595232 ( -0.583822 574.605 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.15 using 59 PHA bins.
# Reduced chi-squared = 0.9118 for 55 degrees of freedom
# Null hypothesis probability = 6.601387e-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] : 8.74403 (-0.872391 0.9795)
R^2/D10^2 : 1.29088 (-0.453757 0.688607)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.46 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 57 degrees of freedom
# Null hypothesis probability = 4.213855e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.892e-08 3.340e-09
25- 50 3.841e-08 4.865e-09
50-150 1.340e-08 3.936e-09
15-150 7.073e-08 9.540e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 46.9869 (-10.47 15.6357)
Norm : 9.62331 (-1.61765 2.04475)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.98 using 59 PHA bins.
# Reduced chi-squared = 0.9295 for 57 degrees of freedom
# Null hypothesis probability = 6.266333e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.318e-08 3.210e-09
25- 50 3.254e-08 3.775e-09
50-150 2.976e-08 8.440e-09
15-150 8.547e-08 1.118e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.30058 (-2.51025 1.44398)
R1^2/D10^2 : 2.28282 (-1.05974 4.9423)
kT2 [keV] : 25.2714 (-20.6071 -25.3996)
R2^2/D10^2 : 8.26027E-03 (-0.00806414 0.189549)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.14 using 59 PHA bins.
# Reduced chi-squared = 0.9117 for 55 degrees of freedom
# Null hypothesis probability = 6.603190e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.129e-08 6.685e-09
25- 50 3.543e-08 1.169e-08
50-150 3.039e-08 1.619e-08
15-150 8.711e-08 3.016e-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: 2.36009 ( -0.131364 0.137451 )
Norm@50keV : 3.28501E-02 ( -0.00320912 0.00316494 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.94 using 59 PHA bins.
# Reduced chi-squared = 1.297 for 57 degrees of freedom
# Null hypothesis probability = 6.511500e-02
Photon flux (15-150 keV) in 0.244 sec: 5.93914 ( -0.462722 0.463162 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.7509e-08 ( -6.38165e-09 6.41537e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.922874 ( -0.954103 0.76146 )
Epeak [keV] : 29.1836 ( -11.3918 5.0993 )
Norm@50keV : 0.241590 ( -0.24209 0.700653 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.32 using 59 PHA bins.
# Reduced chi-squared = 1.095 for 56 degrees of freedom
# Null hypothesis probability = 2.912472e-01
Photon flux (15-150 keV) in 0.244 sec: 5.75778 ( -0.47345 0.47358 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.11843e-08 ( -6.68877e-09 6.98865e-09 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.733982 ( -1.24098 -0.0240555 )
beta : -2.95576 ( -1.1818 0.409217 )
Epeak [keV] : 28.6908 ( -4.28434 4.16381 )
Norm@50keV : 3.52169 ( -3.43131 2080.17 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.74 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 55 degrees of freedom
# Null hypothesis probability = 3.744377e-01
Photon flux (15-150 keV) in 0.244 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) = 2.52743e-08
S(50-100 keV) = 1.96921e-08
T90 vs. Hardness ratio plot
T90 = 0.175999939441681 sec.
Hardness ratio (energy fluence ratio) = 0.779135
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.03631
Count Ratio (50-100 keV) / (15-25 keV) = 0.29184
Mask shadow pattern
IMX = 2.530927381026362E-01, IMY = 4.138903551104882E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
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:
-48.115410 -0.020000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9863 -15.6480 0.4 23.9 74.3 3.2776 27.8 0.6 Sco X-1
254.3618 35.3211 11.9 43.9 172.6 0.1489 1.0 4.9 Her X-1
256.0063 -37.8026 3.2 32.8 25.2 0.4219 3.6 2.7 4U 1700-377
256.3035 -36.3548 6.6 31.4 25.8 0.2019 1.8 7.6 GX 349+2
262.8934 -24.7398 4.7 18.6 21.7 0.2294 2.4 6.3 GX 1+4
264.8270 -44.4385 3.6 37.8 11.4 0.3833 3.2 3.7 4U 1735-44
268.4315 -1.2920 14.7 5.5 -163.0 0.0632 0.8 10.4 SW J1753.5-0127
270.3557 -25.0859 4.1 18.6 0.3 0.2433 2.8 3.9 GX 5-1
270.1832 -25.7884 5.1 19.2 1.1 0.1974 2.3 7.0 GRS 1758-258
274.1326 -13.8638 0.0 9.6 -33.3 0.2339 3.0 12.7 GX 17+2
276.1100 -30.4866 0.0 25.1 -9.3 -0.1208 -1.4 12.0 H1820-303
285.1642 -24.7774 4.9 24.7 -32.8 0.2086 2.3 11.1 HT1900.1-2455
288.8350 10.8569 4.6 27.5 -121.4 0.2682 2.5 5.7 GRS 1915+105
299.5978 35.1814 3.3 51.6 -138.2 1.6535 3.5 1.3 Cyg X-1
262.9726 -33.8083 20.7 27.4 16.6 0.0536 0.6 1.8 GX 354-0
242.0831 14.1641 2.2 32.8 137.8 0.7387 5.4 ------ UNKNOWN
259.3752 18.6380 2.8 26.6 170.6 0.3769 4.1 ------ UNKNOWN
296.9578 41.5450 4.0 55.2 -145.3 1.5049 2.9 ------ UNKNOWN
308.0964 -1.3205 3.8 40.7 -87.6 1.2010 3.0 ------ UNKNOWN
304.0229 20.0997 2.8 44.8 -119.4 1.6198 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.020000 0.224000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0028 -15.5011 13.4 23.8 74.7 0.0088 0.9 8.5 Sco X-1
254.5592 35.5165 0.0 44.0 172.9 -0.0003 -0.0 11.6 Her X-1
256.1342 -37.7313 16.5 32.7 25.1 -0.0080 -0.7 9.7 4U 1700-377
256.6201 -36.5344 10.5 31.4 25.2 -0.0120 -1.1 11.1 GX 349+2
263.0936 -24.8873 22.1 18.7 21.0 0.0041 0.5 9.7 GX 1+4
264.9021 -44.4037 18.5 37.8 11.3 -0.0074 -0.6 7.4 4U 1735-44
268.2418 -1.6222 0.0 5.1 -164.5 -0.0095 -1.2 12.7 SW J1753.5-0127
270.1220 -25.0604 5.3 18.5 1.0 0.0168 2.2 8.9 GX 5-1
270.4317 -25.5729 0.0 19.0 0.3 -0.0061 -0.8 12.4 GRS 1758-258
274.0017 -14.0913 26.5 9.7 -31.8 0.0035 0.4 3.3 GX 17+2
276.0622 -30.2529 6.9 24.8 -9.4 -0.0138 -1.7 9.9 H1820-303
285.2153 -25.0270 0.0 24.9 -32.5 0.0123 1.4 11.7 HT1900.1-2455
288.8166 10.9775 28.7 27.6 -121.6 0.0038 0.4 2.2 GRS 1915+105
299.4483 35.1631 6.2 51.5 -138.3 0.0728 1.9 7.3 Cyg X-1
263.0858 -33.7371 13.7 27.3 16.4 -0.0079 -0.8 7.6 GX 354-0
232.8388 -10.4834 2.4 34.5 89.5 0.0898 4.8 ------ UNKNOWN
271.0883 -49.4971 2.4 42.9 4.9 0.0666 4.9 ------ UNKNOWN
272.1598 -20.4109 0.5 14.4 -9.3 0.1704 21.8 ------ UNKNOWN
287.4328 47.1449 2.0 56.7 -155.8 0.1922 5.7 ------ UNKNOWN
295.5437 25.2351 2.6 42.0 -132.4 0.0717 4.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
45.384600 751.584600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9804 -15.6290 0.2 26.2 99.3 48.8703 48.6 0.7 Sco X-1
255.9746 -37.8316 0.9 22.4 38.6 9.4571 12.4 0.9 4U 1700-377
256.4467 -36.4200 3.0 21.1 40.6 2.7101 3.9 0.6 GX 349+2
262.9640 -24.7055 3.0 9.5 64.7 2.3856 3.8 3.4 GX 1+4
264.7010 -44.4202 28.3 24.8 16.0 0.2827 0.4 2.5 4U 1735-44
268.3913 -1.4980 5.4 19.3 171.8 1.3983 2.2 3.1 SW J1753.5-0127
270.3374 -25.0423 1.7 4.9 22.8 3.9812 7.0 3.6 GX 5-1
270.3751 -25.6350 2.7 5.5 20.3 2.7574 4.8 7.6 GRS 1758-258
274.0852 -14.0560 2.8 6.6 -160.2 2.7738 4.2 4.8 GX 17+2
275.7655 -30.4969 19.2 10.6 -13.9 0.3846 0.6 11.4 H1820-303
284.9623 -24.8405 6.1 12.6 -63.8 1.1646 1.9 6.3 HT1900.1-2455
288.7968 10.9192 1.8 35.4 -147.6 6.3594 6.5 1.6 GRS 1915+105
262.8133 -33.8554 4.4 15.8 33.0 1.7184 2.7 8.8 GX 354-0
247.1510 21.8620 3.2 48.8 151.9 8.8194 3.6 ------ UNKNOWN
263.5978 16.1089 2.7 37.5 169.7 4.4402 4.3 ------ UNKNOWN
265.6710 -27.7217 1.2 9.4 41.0 6.4287 9.8 ------ UNKNOWN
266.1562 -28.7458 2.1 10.0 35.3 3.6987 5.6 ------ UNKNOWN
265.2528 28.0847 2.6 49.0 175.2 7.1452 4.5 ------ UNKNOWN
279.1158 -49.2275 3.2 29.3 -6.0 2.7996 3.6 ------ UNKNOWN
293.5916 -16.4530 3.5 20.7 -94.2 2.2178 3.3 ------ UNKNOWN
Plot creation:
Tue Apr 29 19:39:26 EDT 2014