batgrbproduct analysis for trigger=750298

batgrbproduct Analysis for Trigger=750298

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed May 24 15:43:20 EDT 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger750298
======================================================================

  Trigger: 00750298      Segment: 000

  BAT Trigger Time: 515063641.216   [s; MET]
      Trigger Stop: 515063641.664   [s; MET]
               UTC: 2017-04-28T09:13:42.238600    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) Expanded to TRIGTIME - 64 ms to TRIGTIME + 320 ms

  BAT 
    RA: 330.062855519899   Dec: 26.9175780247122  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.87
     Image Trigger?:     NO
     Rate S/N Ratio:     96.3587048480831  [ if not an image trigger ]
     Image S/N Ratio:    12.87

  Flight Position:   [ source = BAT ]
    RA: 330.062855519899   Dec: 26.9175780247122  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 330.051862971472   Dec: 26.9135089948278  [deg; J2000]  
        { 22h 00m 12.4s , +26d 54' 48.6" }
         +/- 1.22146912638955 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.463192274735448 [arcmin] (formal 1-sigma fit error)
    SNR: 22.8560159779109
 
  Angular difference between Flight and Ground position is 0.636769 arcmin
 
  Partial Coding Fraction: 0.625    [ including projection effects ]

  Duration
     T90: 0.199999928474426 +/- 0.0737563758292483
        Measured from: 0.164000034332275
                   to: 0.363999962806702     [s; relative to TRIGTIME]
     T50: 0.0999999642372131 +/- 0.0226274207069314
        Measured from: 0.200000047683716
                   to: 0.300000011920929     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.199999988079071     
                   to: 0.800000011920929     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.148000061511993     
                   to: 0.448000013828278     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.040429   0.116143   0.133712   0.074641
           0.006092   0.007808   0.008790   0.007758 [error]
 Peak      0.044862   0.123833   0.134522   0.081290
           0.009109   0.010458   0.010608   0.009487 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
=== Fluence/Peak Flux Summary ===
 
              Model    Band1    Band2    Band3    Band4    Band5    Total      
                       15-25    25-50   50-100  100-350   15-150   15-350   keV
Fluence   Power-law 1.51e-08 4.38e-08 1.03e-07 6.72e-07 2.80e-07 8.34e-07   erg/cm2
              Error 2.24e-09 3.88e-09 7.94e-09 1.20e-07 2.20e-08 1.24e-07   erg/cm2
Peak flux Power-law 5.25e-01 7.99e-01 9.10e-01 1.98e+00 2.82e+00 4.21e+00   ph/cm2/s
              Error 1.02e-01 9.41e-02 8.16e-02 3.98e-01 2.50e-01 4.26e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.39e-08 4.50e-08 1.08e-07 4.20e-07 2.75e-07 5.88e-07   erg/cm2
              Error 2.76e-09 4.33e-09 9.86e-09 2.41e-07 2.38e-08 2.40e-07   erg/cm2
Peak flux Cutoff-PL 4.94e-01 8.07e-01 9.35e-01 1.57e+00 2.80e+00 3.80e+00   ph/cm2/s
              Error 9.54e-02 9.91e-02 1.02e-01 6.07e-01 2.57e-01 6.08e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.759    0.123    -      -           7.85e-02 5.66e-03   58.410 57
CPL   0.415    0.494     266.6    0.0      1.12e-01 5.95e-02   56.980 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.812    0.156    -      -           2.46e-02 2.21e-03   51.690 57
CPL   0.589    0.474     372.0    0.0      3.08e-02 1.74e-02   51.260 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err   : 90% error of the photon index
Epeak      : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm       : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom

 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 0.192000 sec.
T50 in the 50-300 keV band: 0.128000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.300    0.148    0.448
T90     0.200    0.164    0.364
T50     0.100    0.200    0.300
Peak    1.000   -0.200    0.800

Click here for the BAT GCN circular template

Special notes of this burst

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  330.0519    26.9135   0.0084    33.0199   165.7439         0.3698468     22.856 TRIG_00750298                 
 
Foreground time interval of the image:
  0.148   0.448 (delta_t =   0.300 [sec])
Background time interval of the image:
-622.015 -607.936 (delta_t =  14.080 [sec])
-179.216   0.148 (delta_t = 179.364 [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

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

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    0.148 sec. to    0.448 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.758586     ( -0.124939   0.121921 )
Norm@50keV  : 7.84841E-02    ( -0.00567241   0.00564841 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.41 using 59 PHA bins.
# Reduced chi-squared =          1.025 for     57 degrees of freedom 
# Null hypothesis probability =   4.232770e-01
 
Photon flux (15-150 keV)    in 0.3 sec: 0.525477 ( -0.032798  0.146213 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.80079e-07 ( -2.19478e-08  2.20766e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.148 sec. to    0.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.415329     ( -0.547899   0.440599 )
Epeak [keV] : 266.609      ( -266.609 -266.609 )
Norm@50keV  : 0.111675    ( -0.0382381   0.0808612 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.98 using 59 PHA bins.
# Reduced chi-squared =          1.018 for     56 degrees of freedom 
# Null hypothesis probability =   4.382536e-01
 
Photon flux (15-150 keV)    in 0.3 sec: 8.94465 ( -0.65503  0.6538 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.75284e-07 ( -2.42914e-08  2.33649e-08 ) ergs/cm2

Band function

Time interval is from    0.148 sec. to    0.448 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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]    : 24.0661  (-2.39157  2.82804)
R^2/D10^2   : 0.259721  (-0.0723881   0.09516)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.61 using 59 PHA bins.
# Reduced chi-squared =          1.379 for     57 degrees of freedom 
# Null hypothesis probability =   3.045749e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.996e-09   1.089e-09
25- 50  4.447e-08   4.590e-09
50-150  1.919e-07   2.412e-08
15-150  2.443e-07   2.638e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 33.1769       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         160.56 using 59 PHA bins.
# Reduced chi-squared =         2.8168 for     57 degrees of freedom 
# Null hypothesis probability =   8.535868e-12
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.478e-08   3.230e-09
25- 50  4.768e-08   1.180e-08
50-150  1.046e-07   4.252e-08
15-150  1.770e-07   7.449e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 14.2447        (-3.38018      2.26894)
R1^2/D10^2  : 0.854886        (-0.311414      0.707602)
kT2 [keV]   : 99.0527        (-57.0674      -99.8025)
R2^2/D10^2  : 5.48581E-03    (-0.00392253   0.0339486)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.95 using 59 PHA bins.
# Reduced chi-squared =         0.9446 for     55 degrees of freedom 
# Null hypothesis probability =   5.918200e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.196e-08   3.660e-09
25- 50  4.951e-08   1.815e-08
50-150  2.120e-07   1.623e-07
15-150  2.734e-07   1.931e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.200 sec. to    0.800 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.811916     ( -0.159445   0.153553 )
Norm@50keV  : 2.45799E-02    ( -0.00222394   0.00220428 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.69 using 59 PHA bins.
# Reduced chi-squared =         0.9068 for     57 degrees of freedom 
# Null hypothesis probability =   6.738922e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.82388 ( -0.25007  0.2506 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.85838e-07 ( -2.64798e-08  2.66332e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.200 sec. to    0.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.588504     ( -0.652056   0.295103 )
Epeak [keV] : 371.959      ( -371.963 -371.963 )
Norm@50keV  : 3.07523E-02    ( -0.00796558   0.0269339 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.26 using 59 PHA bins.
# Reduced chi-squared =         0.9154 for     56 degrees of freedom 
# Null hypothesis probability =   6.544868e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.80094 ( -0.25692  0.25645 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.82872e-07 ( -2.823e-08  2.77842e-08 ) ergs/cm2

Band function

Time interval is from   -0.200 sec. to    0.800 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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]    : 24.5237  (-3.05741  3.79421)
R^2/D10^2   : 7.49958E-02  (-0.0260557   0.0374892)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.41 using 59 PHA bins.
# Reduced chi-squared =          1.218 for     57 degrees of freedom 
# Null hypothesis probability =   1.252710e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.915e-09   1.449e-09
25- 50  4.446e-08   6.430e-09
50-150  1.988e-07   2.710e-08
15-150  2.511e-07   3.070e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-13.1081      -200)
Norm        : 11.1057       (-1.03723     1.03723)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         111.74 using 59 PHA bins.
# Reduced chi-squared =         1.9604 for     57 degrees of freedom 
# Null hypothesis probability =   2.022908e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.766e-08   1.510e-08
25- 50  5.320e-08   1.880e-08
50-150  1.167e-07   6.035e-08
15-150  1.975e-07   1.072e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 12.2518        (-3.06745      3.99152)
R1^2/D10^2  : 0.387372        (-0.19341      0.428331)
kT2 [keV]   : 63.7065        (-29.5543      -67.2962)
R2^2/D10^2  : 4.39704E-03    (-0.00337914   0.0137745)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.39 using 59 PHA bins.
# Reduced chi-squared =         0.8616 for     55 degrees of freedom 
# Null hypothesis probability =   7.573542e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.392e-08   6.024e-09
25- 50  5.187e-08   2.401e-08
50-150  2.193e-07   1.100e-07
15-150  2.851e-07   1.348e-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: 0.758586     ( -0.124939   0.121921 )
Norm@50keV  : 7.84841E-02    ( -0.00567241   0.00564841 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.41 using 59 PHA bins.
# Reduced chi-squared =          1.025 for     57 degrees of freedom 
# Null hypothesis probability =   4.232770e-01
 
Photon flux (15-150 keV)    in 0.3 sec: 9.03696 ( -0.639692  0.639944 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.80049e-07 ( -2.19668e-08  2.20787e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.415303     ( -0.547894   0.440605 )
Epeak [keV] : 266.590      ( -266.609 -266.609 )
Norm@50keV  : 0.111678    ( -0.0382376   0.0808611 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.98 using 59 PHA bins.
# Reduced chi-squared =          1.018 for     56 degrees of freedom 
# Null hypothesis probability =   4.382535e-01
 
Photon flux (15-150 keV)    in 0.3 sec: 8.94456 ( -0.65066  0.6537 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.75419e-07 ( -2.37873e-08  2.33802e-08 ) ergs/cm2

Band function

 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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)  = 4.38e-08
S(50-100 keV) = 1.03e-07

T90 vs. Hardness ratio plot

T90                                   = 0.199999928474426 sec.
Hardness ratio (energy fluence ratio) = 2.3516

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 2.87276
Count Ratio (50-100 keV) / (15-25 keV) = 3.30733

Mask shadow pattern

IMX = -6.298865960649478E-01, IMY = -1.600419800630581E-01

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

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:
-622.015400 -607.935600
-179.216000 0.148000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.0508  38.2967    7.5  44.1  172.4   1.4792   1.5    5.9	Cyg X-2                       
347.6080 -19.7774    2.1  19.9   26.2   2.2849   5.5 ------	UNKNOWN                       
334.9685  32.3721    2.4  35.3  177.4   2.6482   4.9 ------	UNKNOWN                       
336.3142  35.8732    2.8  38.0 -178.5   2.4346   4.2 ------	UNKNOWN                       
352.2759  18.7170    3.6  18.8 -153.6   1.4004   3.3 ------	UNKNOWN                       
  8.0449 -20.3412    2.8  27.0  -20.2   1.8241   4.0 ------	UNKNOWN                       
  3.1404  36.8509    3.5  38.8 -143.4   2.3077   3.3 ------	UNKNOWN                       
 19.9767  39.4655    2.3  48.0 -129.1  10.5793   4.9 ------	UNKNOWN

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
0.148000 0.448000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.1025  38.2487    7.0  44.1  172.5   0.0379   1.7    5.5	Cyg X-2                       
306.5985  13.4103    1.8  45.0  128.8   0.3453   6.5 ------	UNKNOWN                       
330.0519  26.9135    0.5  33.0  165.7   0.3697  22.9 ------	UNKNOWN                       
327.7791  32.8918    2.1  39.0  169.3   0.0957   5.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
68.284600 950.284610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5823  35.2029    0.5  27.3  118.0  22.4451  23.1    0.4	Cyg X-1                       
308.0830  40.9497    1.1  22.9  136.2   8.4825  10.2    1.2	Cyg X-3                       
326.3247  38.1819    5.7  11.7  168.2   1.4109   2.0   11.1	Cyg X-2                       
 26.1658  48.1687    2.8  48.0 -129.1  16.6514   4.1 ------	UNKNOWN

Plot creation:
Wed May 24 16:20:23 EDT 2017