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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
281.8358 -11.1920 0.0237 26.8111 -172.8743 0.0793030 8.111 TRIG_00592544
Foreground time interval of the image:
-0.176 0.464 (delta_t = 0.640 [sec])
Background time interval of the image:
-239.728 -0.176 (delta_t = 239.552 [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 0.256000
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 0.256000
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 0.256000
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)
The mask-weighted light curves based on cleaned DPHs
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 -0.176 sec. to 0.464 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29291 ( -0.359623 0.358754 )
Norm@50keV : 8.27767E-03 ( -0.00157527 0.00157456 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.13 using 59 PHA bins.
# Reduced chi-squared = 1.213 for 57 degrees of freedom
# Null hypothesis probability = 1.302202e-01
Photon flux (15-150 keV) in 0.64 sec: 0.986266 ( -0.194608 0.195852 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.24422e-08 ( -1.10778e-08 1.12214e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.176 sec. to 0.464 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.51875 ( )
Epeak [keV] : 168.789 ( )
Norm@50keV : 1.82924E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.72 using 59 PHA bins.
# Reduced chi-squared = 1.227 for 56 degrees of freedom
# Null hypothesis probability = 1.182902e-01
Photon flux (15-150 keV) in 0.64 sec: 0.984840 ( -0.205631 0.19558 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.25007e-08 ( -1.13782e-08 1.11488e-08 ) ergs/cm2
Band function
Time interval is from -0.176 sec. to 0.464 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.50805 ( 1.64499 2.50805 )
beta : -1.29288 ( -0.358955 0.359483 )
Epeak [keV] : 298.772 ( -298.772 -298.772 )
Norm@50keV : 1.12505 ( -0.214131 0.214008 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.13 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 55 degrees of freedom
# Null hypothesis probability = 9.533295e-02
Photon flux (15-150 keV) in 0.64 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] : 21.6917 (-5.03375 6.77998)
R^2/D10^2 : 3.37533E-02 (-0.0195003 0.0457144)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.63 using 59 PHA bins.
# Reduced chi-squared = 1.327 for 57 degrees of freedom
# Null hypothesis probability = 4.995606e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.893e-09 7.830e-10
25- 50 9.927e-09 4.460e-09
50-150 3.488e-08 1.314e-08
15-150 4.670e-08 1.681e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 4.08759 (-0.787778 0.787701)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.12 using 59 PHA bins.
# Reduced chi-squared = 1.248 for 57 degrees of freedom
# Null hypothesis probability = 9.888279e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.515e-09 3.901e-09
25- 50 1.253e-08 7.306e-09
50-150 2.748e-08 1.575e-08
15-150 4.653e-08 2.700e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.21951 (-2.68669 3.68377)
R1^2/D10^2 : 7.13204 (-6.64962 5801.82)
kT2 [keV] : 26.6610 (-6.96048 13.0044)
R2^2/D10^2 : 1.61486E-02 (-0.0115028 0.0275423)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.31 using 59 PHA bins.
# Reduced chi-squared = 1.206 for 55 degrees of freedom
# Null hypothesis probability = 1.412669e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.578e-09 3.598e-09
25- 50 9.457e-09 4.318e-09
50-150 3.761e-08 2.265e-08
15-150 5.365e-08 2.697e-08
Peak spectrum fit
Power-law model
Time interval is from -0.356 sec. to 0.644 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29788 ( -0.467566 0.4682 )
Norm@50keV : 5.20299E-03 ( -0.00121617 0.00121597 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.87 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.064582e-01
Photon flux (15-150 keV) in 1 sec: 0.620482 ( -0.152352 0.153583 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.1442e-08 ( -1.3293e-08 1.34683e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.356 sec. to 0.644 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28685 ( -0.610855 0.474103 )
Epeak [keV] : 9999.32 ( -9999.36 -9999.36 )
Norm@50keV : 5.21992E-03 ( -0.00122221 0.0176868 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.87 using 59 PHA bins.
# Reduced chi-squared = 1.105 for 56 degrees of freedom
# Null hypothesis probability = 2.744874e-01
Photon flux (15-150 keV) in 1 sec: 0.622181 ( -0.157038 0.151443 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.14466e-08 ( -1.32768e-08 1.33715e-08 ) ergs/cm2
Band function
Time interval is from -0.356 sec. to 0.644 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.29877 ( -0.466976 1.72491 )
beta : -9.33789 ( 6.1799 9.33789 )
Epeak [keV] : 9999.36 ( -9925.46 -9999.36 )
Norm@50keV : 5.21441E-03 ( -0.00122155 0.0176972 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.87 using 59 PHA bins.
# Reduced chi-squared = 1.125 for 55 degrees of freedom
# Null hypothesis probability = 2.441720e-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] : 23.0894 (-6.21994 9.38124)
R^2/D10^2 : 1.72765E-02 (-0.0112937 0.0302383)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.25 using 59 PHA bins.
# Reduced chi-squared = 1.162 for 57 degrees of freedom
# Null hypothesis probability = 1.880430e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.666e-09 1.008e-09
25- 50 9.059e-09 5.107e-09
50-150 3.607e-08 1.958e-08
15-150 4.679e-08 2.255e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.359 (-94.3809 -199.362)
Norm : 2.57702 (-0.610729 0.612892)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.37 using 59 PHA bins.
# Reduced chi-squared = 1.112 for 57 degrees of freedom
# Null hypothesis probability = 2.617681e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.417e-09 3.907e-09
25- 50 1.234e-08 7.260e-09
50-150 2.707e-08 1.599e-08
15-150 4.583e-08 2.683e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.99573 (-1.22978 4.09951)
R1^2/D10^2 : 527.671 (-572.777 9721)
kT2 [keV] : 25.4895 (-6.84934 13.1135)
R2^2/D10^2 : 1.22065E-02 (-0.00876511 0.0211077)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.48 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 55 degrees of freedom
# Null hypothesis probability = 3.834262e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.122e-09 3.299e-09
25- 50 7.939e-09 4.498e-09
50-150 3.752e-08 2.286e-08
15-150 5.158e-08 2.641e-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: 1.29291 ( -0.359623 0.358754 )
Norm@50keV : 8.27767E-03 ( -0.00157527 0.00157456 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.13 using 59 PHA bins.
# Reduced chi-squared = 1.213 for 57 degrees of freedom
# Null hypothesis probability = 1.302202e-01
Photon flux (15-150 keV) in 0.64 sec: 0.986266 ( -0.194608 0.195852 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.24422e-08 ( -1.10778e-08 1.12214e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.51875 ( )
Epeak [keV] : 168.789 ( )
Norm@50keV : 1.82924E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.72 using 59 PHA bins.
# Reduced chi-squared = 1.227 for 56 degrees of freedom
# Null hypothesis probability = 1.182902e-01
Photon flux (15-150 keV) in 0.64 sec: 0.984840 ( -0.205631 0.19558 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.25007e-08 ( -1.13782e-08 1.11488e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.50805 ( 1.64499 2.50805 )
beta : -1.29288 ( -0.358955 0.359483 )
Epeak [keV] : 298.772 ( -298.772 -298.772 )
Norm@50keV : 1.12505 ( -0.214131 0.214008 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.13 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 55 degrees of freedom
# Null hypothesis probability = 9.533295e-02
Photon flux (15-150 keV) in 0.64 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) = 1.16e-08
S(50-100 keV) = 1.90e-08
T90 vs. Hardness ratio plot
T90 = 0.512000024318695 sec.
Hardness ratio (energy fluence ratio) = 1.63793
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.23972
Count Ratio (50-100 keV) / (15-25 keV) = 1.54379
Mask shadow pattern
IMX = -5.014766492289734E-01, IMY = 6.269090877061936E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
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:
-239.728000 -0.176000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9794 -15.6142 1.7 41.0 124.2 5.1467 6.7 1.6 Sco X-1
255.9859 -37.8389 1.2 22.2 93.6 2.4398 9.3 0.3 4U 1700-377
256.6092 -36.5397 5.4 21.9 97.3 0.5530 2.1 10.9 GX 349+2
263.1092 -24.7235 2.8 22.2 132.5 0.9315 4.0 5.6 GX 1+4
264.7363 -44.4958 4.6 16.0 71.7 0.5421 2.5 2.8 4U 1735-44
268.2579 -1.6215 0.0 39.1 166.5 0.4978 1.4 12.1 SW J1753.5-0127
270.1394 -25.0630 4.1 17.5 145.4 0.6157 2.8 7.9 GX 5-1
270.2569 -25.6985 4.3 17.0 144.3 0.5934 2.7 3.6 GRS 1758-258
274.1382 -13.9629 6.9 25.6 169.1 0.4334 1.7 8.9 GX 17+2
275.7844 -30.3922 3.4 10.2 147.1 0.6996 3.4 7.4 H1820-303
285.1201 -24.7541 7.2 13.2 -164.0 0.4094 1.6 11.0 HT1900.1-2455
288.8445 10.9255 1.5 49.0 -161.7 3.7926 7.6 3.0 GRS 1915+105
263.1231 -33.9086 3.0 17.5 109.1 0.8419 3.8 8.0 GX 354-0
265.6935 -27.7292 1.4 18.5 130.2 1.8750 8.5 ------ UNKNOWN
266.1202 -28.7476 0.3 17.6 128.3 7.3542 32.9 ------ UNKNOWN
270.0268 -13.9124 2.4 27.1 160.8 1.1986 4.9 ------ UNKNOWN
268.1997 15.8296 2.3 55.8 173.5 5.4807 5.0 ------ UNKNOWN
15.9170 -59.3305 3.0 58.9 -24.3 7.7711 3.8 ------ UNKNOWN
331.0116 -25.9428 2.6 41.1 -80.7 5.4316 4.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.176000 0.464000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9864 -15.5140 3.9 41.1 124.4 -0.0970 -3.0 7.6 Sco X-1
255.8064 -37.7599 4.0 22.3 93.8 0.0327 2.9 9.9 4U 1700-377
256.3203 -36.5557 4.7 22.1 97.1 0.0270 2.5 9.7 GX 349+2
263.0112 -24.7455 2700.0 22.3 132.3 -0.0000 -0.0 0.1 GX 1+4
264.8226 -44.3065 642.2 15.9 72.3 0.0002 0.0 9.3 4U 1735-44
268.4235 -1.2928 3.0 39.4 166.9 0.0546 3.8 10.2 SW J1753.5-0127
270.1747 -24.9411 4.7 17.6 145.7 -0.0216 -2.5 10.2 GX 5-1
270.1314 -25.6106 0.0 17.1 144.2 0.0274 3.1 12.2 GRS 1758-258
273.9053 -13.9758 10.0 25.6 168.6 0.0112 1.2 6.9 GX 17+2
275.9555 -30.2901 3.7 10.2 148.1 0.0265 3.1 4.9 H1820-303
285.0328 -24.9209 119.5 13.0 -164.3 -0.0009 -0.1 0.2 HT1900.1-2455
288.8159 11.0870 81.9 49.2 -161.8 0.0028 0.1 8.6 GRS 1915+105
263.1574 -33.9738 42.9 17.4 108.9 -0.0027 -0.3 11.8 GX 354-0
227.9640 -61.7033 2.6 41.5 48.7 0.1157 4.5 ------ UNKNOWN
281.8349 -11.1928 1.4 26.8 -172.9 0.0798 8.2 ------ UNKNOWN
347.4629 -69.2165 2.1 45.5 -14.2 0.0841 5.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
64.372600 288.572600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9643 -15.6628 1.4 36.1 81.1 4.7610 8.3 1.6 Sco X-1
256.0818 -37.8705 2.6 35.3 38.9 1.5203 4.5 4.8 4U 1700-377
256.4219 -36.5403 15.4 34.2 40.3 0.2601 0.7 7.1 GX 349+2
262.8525 -24.5886 420.2 22.5 53.2 0.0067 0.0 12.7 GX 1+4
264.6458 -44.3130 3.7 36.3 23.4 0.9334 3.1 9.2 4U 1735-44
268.2202 -1.4562 6.0 16.7 127.2 -0.4032 -1.9 8.9 SW J1753.5-0127
270.2528 -24.9714 9.1 17.6 39.4 0.2577 1.3 6.7 GX 5-1
270.3709 -25.7817 3.0 18.2 37.5 0.8046 3.9 4.4 GRS 1758-258
273.8507 -13.9890 4.1 8.3 71.8 0.5692 2.8 9.5 GX 17+2
275.7624 -30.2692 3.5 19.9 18.0 0.6849 3.2 10.3 H1820-303
285.1964 -24.9145 8.6 14.1 -10.2 0.2962 1.3 8.7 HT1900.1-2455
288.8027 10.9687 0.8 23.2 -160.1 3.4217 14.4 1.4 GRS 1915+105
299.5761 35.2152 1.5 49.3 -158.5 4.2461 7.9 1.1 Cyg X-1
308.2685 40.8244 9.3 57.5 -154.1 -1.8469 -1.3 10.5 Cyg X-3
262.9877 -33.7902 3.7 28.4 36.8 0.7955 3.2 2.7 GX 354-0
265.6420 -27.7410 1.7 22.5 42.7 1.5608 6.8 ------ UNKNOWN
266.1379 -28.7451 0.4 22.9 40.0 7.6896 32.7 ------ UNKNOWN
277.3813 -23.7814 2.2 13.3 20.5 1.0882 5.1 ------ UNKNOWN
294.9358 -10.9606 2.4 12.8 -87.3 1.0165 4.8 ------ UNKNOWN
315.9326 -45.8908 5.6 45.2 -31.0 0.8629 2.1 ------ UNKNOWN
321.4313 1.6304 3.4 41.4 -103.2 4.4118 3.4 ------ UNKNOWN
UNKNOWN
Plot creation:
Sat May 30 14:00:09 EDT 2015