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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
241.8563 32.3078 0.0193 32.5885 167.5201 1.0165707 9.947 TRIG_00191512
Foreground time interval of the image:
-57.068 8.240 (delta_t = 65.308 [sec])
Background time interval of the image:
-299.144 -57.068 (delta_t = 242.076 [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 8.192000
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 8.192000
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 8.192000
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 -57.068 sec. to 8.240 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.52916 ( -0.302367 0.342262 )
Norm@50keV : 6.68679E-04 ( -0.000162841 0.000161379 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.30 using 59 PHA bins.
# Reduced chi-squared = 1.128 for 57 degrees of freedom
# Null hypothesis probability = 2.361666e-01
Photon flux (15-150 keV) in 65.31 sec: 0.133741 ( -0.0199207 0.0199227 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.40205e-07 ( -7.79338e-08 8.1211e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -57.068 sec. to 8.240 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.969678 ( -1.78599 1.03206 )
Epeak [keV] : 24.1353 ( )
Norm@50keV : 6.24248E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.97 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 56 degrees of freedom
# Null hypothesis probability = 3.018696e-01
Photon flux (15-150 keV) in 65.31 sec: 0.128297 ( -0.020261 0.020368 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.97114e-07 ( -7.1374e-08 8.32487e-08 ) ergs/cm2
Band function
Time interval is from -57.068 sec. to 8.240 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06116 ( -0.896144 1.04081 )
beta : -9.37167 ( 9.37167 19.3716 )
Epeak [keV] : 23.6509 ( -11.5343 10.3949 )
Norm@50keV : 5.40548E-03 ( -0.00541345 0.0571076 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.98 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 55 degrees of freedom
# Null hypothesis probability = 2.695732e-01
Photon flux (15-150 keV) in 65.31 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] : 7.94220 (-1.21239 1.36005)
R^2/D10^2 : 0.149883 (-0.0718987 0.147602)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.30 using 59 PHA bins.
# Reduced chi-squared = 1.146 for 57 degrees of freedom
# Null hypothesis probability = 2.106598e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.111e-07 3.110e-08
25- 50 1.919e-07 4.523e-08
50-150 4.920e-08 2.105e-08
15-150 3.522e-07 8.023e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 32.0801 (-9.08499 14.0087)
Norm : 1.01871 (-0.27242 0.398957)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.14 using 59 PHA bins.
# Reduced chi-squared = 1.073 for 57 degrees of freedom
# Null hypothesis probability = 3.295264e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.399e-07 2.870e-08
25- 50 1.657e-07 3.432e-08
50-150 9.893e-08 4.813e-08
15-150 4.046e-07 8.686e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.70560 (-1.59395 2.47555)
R1^2/D10^2 : 10.4157 (-9.99354 21339.6)
kT2 [keV] : 9.59985 (-1.86652 3.23624)
R2^2/D10^2 : 5.94115E-02 (-0.0459013 0.0863642)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.13 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 55 degrees of freedom
# Null hypothesis probability = 3.272841e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.367e-07 7.014e-08
25- 50 1.746e-07 9.764e-08
50-150 7.788e-08 4.790e-08
15-150 3.892e-07 1.935e-07
Peak spectrum fit
Power-law model
Time interval is from 4.060 sec. to 5.060 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.85688 ( -0.709216 1.07122 )
Norm@50keV : 2.18960E-03 ( -0.00138491 0.00143663 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.12 using 59 PHA bins.
# Reduced chi-squared = 0.8618 for 57 degrees of freedom
# Null hypothesis probability = 7.616864e-01
Photon flux (15-150 keV) in 1 sec: 0.543742 ( -0.162833 0.16301 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.47205e-08 ( -9.28327e-09 1.03048e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.060 sec. to 5.060 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87609 ( )
Epeak [keV] : 4.44053 ( )
Norm@50keV : 9.23919E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.47 using 59 PHA bins.
# Reduced chi-squared = 0.8834 for 56 degrees of freedom
# Null hypothesis probability = 7.186881e-01
Photon flux (15-150 keV) in 1 sec: 0.543499 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.45857e-08 ( -9.3638e-09 1.04561e-08 ) ergs/cm2
Band function
Time interval is from 4.060 sec. to 5.060 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.00335 ( 11.7286 7.00335 )
beta : -2.85707 ( -1.07159 0.708559 )
Epeak [keV] : 39.4947 ( -39.4947 -39.4947 )
Norm@50keV : 0.297558 ( -0.188204 0.195282 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.12 using 59 PHA bins.
# Reduced chi-squared = 0.8931 for 55 degrees of freedom
# Null hypothesis probability = 6.976526e-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] : 6.62799 (-2.53387 2.92323)
R^2/D10^2 : 1.24117 (-1.23513 9.66106)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.10 using 59 PHA bins.
# Reduced chi-squared = 0.9141 for 57 degrees of freedom
# Null hypothesis probability = 6.588566e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.247e-09 5.080e-09
25- 50 1.014e-08 6.215e-09
50-150 1.373e-09 1.167e-09
15-150 1.976e-08 1.246e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.3425 (-12.6611 30.2891)
Norm : 5.46941 (-2.92629 9.76961)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.77 using 59 PHA bins.
# Reduced chi-squared = 0.8731 for 57 degrees of freedom
# Null hypothesis probability = 7.405679e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.562e-09 5.186e-09
25- 50 9.367e-09 5.801e-09
50-150 3.594e-09 3.044e-09
15-150 2.252e-08 1.364e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.83962 (-1.74597 2.49467)
R1^2/D10^2 : 1067.84 ( )
kT2 [keV] : 8.80616 (-3.11615 5.28586)
R2^2/D10^2 : 0.314229 (-0.287416 0.918204)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.72 using 59 PHA bins.
#Fit statistic : Chi-Squared = 47.63 using 59 PHA bins.
# Reduced chi-squared = 0.8676 for 55 degrees of freedom
# Reduced chi-squared = 0.8661 for 55 degrees of freedom
# Null hypothesis probability = 7.463990e-01
# Null hypothesis probability = 7.492405e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.567e-09 4.528e-09
25- 50 9.517e-09 5.925e-09
50-150 3.669e-09 2.813e-09
15-150 2.275e-08 1.260e-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: 2.52916 ( -0.302367 0.342262 )
Norm@50keV : 6.68679E-04 ( -0.000162841 0.000161379 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.30 using 59 PHA bins.
# Reduced chi-squared = 1.128 for 57 degrees of freedom
# Null hypothesis probability = 2.361666e-01
Photon flux (15-150 keV) in 65.31 sec: 0.133741 ( -0.0199207 0.0199227 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.40205e-07 ( -7.79338e-08 8.1211e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.969678 ( -1.78599 1.03206 )
Epeak [keV] : 24.1353 ( )
Norm@50keV : 6.24248E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.97 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 56 degrees of freedom
# Null hypothesis probability = 3.018696e-01
Photon flux (15-150 keV) in 65.31 sec: 0.128297 ( -0.020261 0.020368 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.97114e-07 ( -7.1374e-08 8.32487e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06116 ( -0.896144 1.04082 )
beta : -9.37167 ( 9.37167 19.3716 )
Epeak [keV] : 23.6509 ( -11.5343 10.3949 )
Norm@50keV : 5.40548E-03 ( -0.00541345 0.0571076 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.98 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 55 degrees of freedom
# Null hypothesis probability = 2.695732e-01
Photon flux (15-150 keV) in 65.31 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) = 1.46e-07
S(50-100 keV) = 1.01e-07
T90 vs. Hardness ratio plot
T90 = 62.0439999997616 sec.
Hardness ratio (energy fluence ratio) = 0.691781
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.997095
Count Ratio (50-100 keV) / (15-25 keV) = 0.172839
Mask shadow pattern
IMX = -6.241397423938010E-01, IMY = -1.381387024942553E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
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:
-299.144000 -57.068000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9751 -15.6350 0.2 16.5 -36.8 13.9818 61.4 0.4 Sco X-1
254.5137 35.4047 3.4 38.4 -176.4 1.0940 3.4 4.6 Her X-1
255.8446 -37.9752 5.8 40.8 -37.0 0.7825 2.0 10.3 4U 1700-377
256.3724 -36.4235 4.4 39.6 -38.7 1.0194 2.6 3.0 GX 349+2
262.8904 -24.6000 0.0 33.5 -58.2 0.7455 2.1 10.9 GX 1+4
264.5043 -44.5969 9.3 49.8 -40.3 1.0481 1.2 13.5 4U 1735-44
268.3672 -1.4161 6.2 29.2 -104.1 0.6665 1.8 2.2 SW J1753.5-0127
270.3189 -25.2046 7.8 39.1 -64.6 0.8042 1.5 7.8 GX 5-1
270.4300 -25.8724 0.0 39.6 -63.8 -0.5090 -0.9 10.4 GRS 1758-258
273.9190 -14.1428 11.2 37.1 -83.1 0.5519 1.0 8.1 GX 17+2
263.1412 -33.8839 5.9 40.5 -48.0 0.8392 1.9 8.1 GX 354-0
208.2455 8.1595 2.2 31.9 89.2 2.3956 5.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-57.068000 8.240000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.7966 -15.7159 6.7 16.5 -36.2 -0.1452 -1.7 11.5 Sco X-1
254.4102 35.1962 7.4 38.1 -176.3 0.1805 1.6 9.1 Her X-1
255.8769 -37.7005 0.0 40.6 -37.2 -0.1634 -1.2 10.1 4U 1700-377
256.2913 -36.3596 35.6 39.5 -38.6 -0.0421 -0.3 7.9 GX 349+2
263.0592 -24.8822 77.3 33.8 -58.0 0.0197 0.1 8.6 GX 1+4
264.8687 -44.3945 4.9 49.8 -40.7 -0.8388 -2.3 6.3 4U 1735-44
268.2145 -1.5412 3.9 29.1 -103.9 -0.3650 -3.0 10.6 SW J1753.5-0127
270.2534 -24.9539 6.5 39.0 -64.9 0.3713 1.8 7.7 GX 5-1
270.4120 -25.8715 63.6 39.6 -63.8 0.0409 0.2 9.7 GRS 1758-258
273.9853 -14.1449 7.3 37.2 -83.1 0.3324 1.6 6.6 GX 17+2
262.8946 -33.7630 3.9 40.3 -47.9 -0.5029 -3.0 6.4 GX 354-0
255.1045 55.0886 1.8 56.8 174.1 2.8705 6.2 ------ UNKNOWN
241.8563 32.3078 1.2 32.6 167.5 1.0166 9.9 ------ UNKNOWN
233.8601 -7.8402 2.2 9.3 17.7 0.4048 5.3 ------ UNKNOWN
236.0320 -44.0093 2.0 43.9 -13.5 0.7527 5.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
104.156600 302.928500
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9747 -15.6360 0.5 48.0 -12.7 8.5310 21.8 0.4 Sco X-1
254.5513 35.4743 4.6 11.0 -118.8 0.4162 2.5 9.1 Her X-1
268.4534 -1.5935 0.0 42.2 -50.4 0.8154 2.1 9.9 SW J1753.5-0127
329.4647 68.2534 2.6 59.4 -163.1 4.9009 4.4 ------ UNKNOWN
Plot creation:
Sun May 31 14:08:36 EDT 2015