Special notes of this burst
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
314.7121 -53.4024 0.0079 40.1680 -123.2269 24.9704569 24.319 TRIG_00644259
Foreground time interval of the image:
-48.140 492.809 (delta_t = 540.949 [sec])
Background time interval of the image:
-239.992 -48.140 (delta_t = 191.852 [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 16.384000
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 16.384000
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 16.384000
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 -48.140 sec. to 705.776 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66075 ( -0.0569761 0.0570713 )
Norm@50keV : 2.80031E-03 ( -8.50317e-05 8.50102e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.53 using 59 PHA bins.
# Reduced chi-squared = 0.7813 for 57 degrees of freedom
# Null hypothesis probability = 8.853150e-01
Photon flux (15-150 keV) in 753.9 sec: 0.366958 ( -0.0125712 0.0126224 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.96138e-05 ( -6.14249e-07 6.14903e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -48.140 sec. to 705.776 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42784 ( -0.235619 0.22362 )
Epeak [keV] : 131.717 ( -40.6975 868.236 )
Norm@50keV : 3.60039E-03 ( -0.000754084 0.00101209 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.37 using 59 PHA bins.
# Reduced chi-squared = 0.7388 for 56 degrees of freedom
# Null hypothesis probability = 9.279019e-01
Photon flux (15-150 keV) in 753.9 sec: 0.360419 ( -0.013891 0.013957 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.93146e-05 ( -6.84164e-07 6.81149e-07 ) ergs/cm2
Band function
Time interval is from -48.140 sec. to 705.776 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.26514 ( -0.42924 3.31977 )
beta : -1.78727 ( 1.77063 0.122467 )
Epeak [keV] : 86.1327 ( -49.4357 457.598 )
Norm@50keV : 4.47196E-03 ( -0.00154117 260.132 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.84 using 59 PHA bins.
# Reduced chi-squared = 0.7426 for 55 degrees of freedom
# Null hypothesis probability = 9.224504e-01
Photon flux (15-150 keV) in 753.9 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.92741e-05 ( -1.92689e-05 -6.7851e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.3170 ( )
R^2/D10^2 : 3.56265E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 275.11 using 59 PHA bins.
# Reduced chi-squared = 4.8266 for 57 degrees of freedom
# Null hypothesis probability = 2.543301e-30
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.315e-06 7.577e-08
25- 50 5.323e-06 2.171e-07
50-150 8.578e-06 5.127e-07
15-150 1.522e-05 5.390e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 166.463 (-23.6885 30.7959)
Norm : 1.47609 (-0.0564851 0.0610851)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.49 using 59 PHA bins.
# Reduced chi-squared = 0.7455 for 57 degrees of freedom
# Null hypothesis probability = 9.237819e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.830e-06 1.640e-07
25- 50 5.323e-06 3.298e-07
50-150 1.095e-05 2.663e-06
15-150 1.910e-05 2.846e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.34938 (-0.832207 0.897412)
R1^2/D10^2 : 0.333393 (-0.106523 0.176887)
kT2 [keV] : 26.4600 (-2.87315 3.96829)
R2^2/D10^2 : 3.86863E-03 (-0.00155169 0.00213327)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.96 using 59 PHA bins.
# Reduced chi-squared = 0.9083 for 55 degrees of freedom
# Null hypothesis probability = 6.672645e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.632e-06 3.057e-07
25- 50 5.444e-06 3.777e-07
50-150 1.099e-05 1.029e-06
15-150 1.906e-05 1.225e-06
Peak spectrum fit
Power-law model
Time interval is from 93.584 sec. to 94.584 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58792 ( -0.217534 0.221935 )
Norm@50keV : 2.19124E-02 ( -0.00282874 0.00280999 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.15 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 57 degrees of freedom
# Null hypothesis probability = 3.623411e-01
Photon flux (15-150 keV) in 1 sec: 2.80542 ( -0.366809 0.368333 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.05235e-07 ( -2.80916e-08 2.82751e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 93.584 sec. to 94.584 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35407 ( -0.913395 0.444513 )
Epeak [keV] : 147.054 ( -146.965 -146.965 )
Norm@50keV : 2.84355E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.90 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 56 degrees of freedom
# Null hypothesis probability = 3.361131e-01
Photon flux (15-150 keV) in 1 sec: 2.77599 ( -0.38135 0.37943 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03237e-07 ( -2.916e-08 2.8934e-08 ) ergs/cm2
Band function
Time interval is from 93.584 sec. to 94.584 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.35107 ( 1.17232 0.760489 )
beta : -10.0000 ( 10 9.23706e-14 )
Epeak [keV] : 144.144 ( -72.618 -144.348 )
Norm@50keV : 2.86533E-02 ( -0.00933285 0.046446 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.90 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 55 degrees of freedom
# Null hypothesis probability = 3.024492e-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] : 16.5008 (-2.41825 2.82796)
R^2/D10^2 : 0.224105 (-0.0962207 0.167936)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.22 using 59 PHA bins.
# Reduced chi-squared = 1.337 for 57 degrees of freedom
# Null hypothesis probability = 4.542702e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.252e-08 3.240e-09
25- 50 5.409e-08 1.032e-08
50-150 1.041e-07 2.609e-08
15-150 1.707e-07 2.975e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.148 (-89.1803 -199.148)
Norm : 11.3835 (-1.42699 1.71292)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.99 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 57 degrees of freedom
# Null hypothesis probability = 3.677951e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.835e-08 1.597e-08
25- 50 5.453e-08 3.008e-08
50-150 1.196e-07 6.595e-08
15-150 2.024e-07 1.113e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.40451 (-1.23153 1.86771)
R1^2/D10^2 : 18.4432 (-11.8017 73.0179)
kT2 [keV] : 21.5251 (-3.81501 5.71484)
R2^2/D10^2 : 7.75315E-02 (-0.0446514 0.0808731)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.48 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 55 degrees of freedom
# Null hypothesis probability = 4.193499e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.296e-08 1.672e-08
25- 50 4.741e-08 1.698e-08
50-150 1.215e-07 4.919e-08
15-150 2.018e-07 6.338e-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: 1.63553 ( -0.057251 0.0573171 )
Norm@50keV : 3.67300E-03 ( -0.000112598 0.000112583 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.25 using 59 PHA bins.
# Reduced chi-squared = 0.8115 for 57 degrees of freedom
# Null hypothesis probability = 8.447349e-01
Photon flux (15-150 keV) in 540.9 sec: 0.477340 ( -0.01657 0.0166384 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.85049e-05 ( -5.85146e-07 5.85741e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37981 ( -0.236362 0.224409 )
Epeak [keV] : 131.505 ( -38.4907 433.805 )
Norm@50keV : 4.82748E-03 ( -0.00100497 0.00134759 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.45 using 59 PHA bins.
# Reduced chi-squared = 0.7581 for 56 degrees of freedom
# Null hypothesis probability = 9.093353e-01
Photon flux (15-150 keV) in 540.9 sec: 0.468083 ( -0.018235 0.018327 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.82104e-05 ( -6.46213e-07 6.42535e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.37990 ( -0.304808 4.23651 )
beta : -2.64746 ( 9.15778 6.4673 )
Epeak [keV] : 131.684 ( -25.3219 156.256 )
Norm@50keV : 4.82651E-03 ( -0.000729938 0.000917091 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.45 using 59 PHA bins.
# Reduced chi-squared = 0.7718 for 55 degrees of freedom
# Null hypothesis probability = 8.919490e-01
Photon flux (15-150 keV) in 540.9 sec: 0.467182 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.81858e-05 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 5.22e-06
S(50-100 keV) = 6.61e-06
T90 vs. Hardness ratio plot
T90 = 608.407999992371 sec.
Hardness ratio (energy fluence ratio) = 1.26628
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.33326
Count Ratio (50-100 keV) / (15-25 keV) = 0.974371
Mask shadow pattern
IMX = -4.625346132641776E-01, IMY = 7.061034131319260E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000
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:
-239.992000 -48.140000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9892 -15.6351 0.4 25.6 45.8 7.1498 27.1 0.6 Sco X-1
256.0070 -37.7787 2.7 10.2 -25.4 0.8279 4.3 4.0 4U 1700-377
256.5355 -36.4489 5.2 9.2 -19.4 0.4302 2.2 5.1 GX 349+2
262.8692 -24.9004 17.1 8.0 76.4 -0.1236 -0.7 12.0 GX 1+4
264.8734 -44.4618 12.3 12.3 -74.3 -0.1795 -0.9 5.6 4U 1735-44
268.3480 -1.4560 88.5 30.9 104.1 -0.0539 -0.1 1.2 SW J1753.5-0127
270.2776 -25.0278 3.0 8.0 126.3 0.7390 3.8 3.1 GX 5-1
270.3491 -25.7625 8.7 7.3 129.1 0.2464 1.3 2.8 GRS 1758-258
274.0059 -14.0781 4.3 19.5 122.9 0.5855 2.7 2.5 GX 17+2
275.9779 -30.3400 6.8 8.4 179.6 0.3091 1.7 3.2 H1820-303
284.9329 -25.1037 0.0 17.7 171.2 0.2203 1.2 12.3 HT1900.1-2455
263.0828 -33.6716 4.4 3.1 -17.0 0.4857 2.6 10.8 GX 354-0
266.6228 -32.2957 1.5 0.2 -158.3 1.3561 7.6 ------ UNKNOWN
333.3019 -21.8767 3.9 59.5 -161.6 5.3957 3.0 ------ UNKNOWN
197.6286 -59.0879 2.7 52.0 -42.2 4.4555 4.3 ------ UNKNOWN
327.8658 -49.9785 2.9 48.0 -129.1 3.3672 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-48.140000 492.808600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8351 -15.5077 0.0 25.8 45.8 1.5056 2.2 11.5 Sco X-1
255.9467 -37.8610 2.0 10.2 -25.6 3.0215 5.8 2.1 4U 1700-377
256.3516 -36.5770 8.3 9.4 -19.8 0.7319 1.4 10.1 GX 349+2
263.1634 -24.6803 3.3 8.1 78.8 1.7774 3.5 9.3 GX 1+4
264.8304 -44.4040 4.6 12.2 -74.2 1.2812 2.5 4.7 4U 1735-44
268.3557 -1.5320 15.9 30.8 104.1 -0.7263 -0.7 4.8 SW J1753.5-0127
270.3807 -25.1702 9.7 7.9 127.3 -0.5972 -1.2 7.6 GX 5-1
270.2862 -25.7682 9.5 7.3 128.7 0.6475 1.3 1.7 GRS 1758-258
273.8908 -14.1771 5.1 19.3 122.7 1.3297 2.2 10.8 GX 17+2
275.9232 -30.5213 28.9 8.3 -179.3 -0.1927 -0.4 9.3 H1820-303
285.0159 -24.7757 4.4 17.9 170.4 1.2903 2.6 8.8 HT1900.1-2455
263.1406 -33.6644 0.0 3.1 -17.3 -0.7951 -1.6 12.7 GX 354-0
294.9005 7.8434 2.6 48.4 139.5 11.2468 4.3 ------ UNKNOWN
314.7121 -53.4024 0.5 40.2 -123.2 24.9712 24.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
559.808600 962.143200
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
264.7908 -44.5643 9.1 33.2 66.0 0.9979 1.3 7.2 4U 1735-44
275.8686 -30.4894 34.2 36.1 94.8 -0.3474 -0.3 7.9 H1820-303
285.0348 -24.9233 16.0 36.1 111.6 0.6033 0.7 0.2 HT1900.1-2455
308.9706 -3.5032 3.0 50.1 153.8 4.2217 3.9 ------ UNKNOWN
288.0068 -41.4511 3.8 21.4 94.2 1.1431 3.1 ------ UNKNOWN
314.7427 -53.3532 1.6 0.1 -158.0 1.9056 7.2 ------ UNKNOWN
325.9090 -78.1058 3.3 25.0 -24.2 0.8780 3.5 ------ UNKNOWN
347.6895 -1.3851 3.9 58.7 -159.2 5.9282 3.0 ------ UNKNOWN
21.4701 -48.4924 3.5 40.8 -87.5 4.4423 3.4 ------ UNKNOWN
Plot creation:
Sat Jul 11 00:44:29 EDT 2015