GRB150213B

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: Sun Mar  1 23:02:15 EST 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger631051
======================================================================

  Trigger: 00631051      Segment: 000

  BAT Trigger Time: 445559504   [s; MET]
      Trigger Stop: 445559568   [s; MET]
               UTC: 2015-02-13T22:31:30.817240    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 253.42510590632   Dec: 34.1786965238723  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.03
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.03

  Analysis Position:   [ source = BAT ]
    RA: 253.42510590632   Dec: 34.1786965238723  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 253.447648236967   Dec: 34.1630797570746  [deg; J2000]  
        { 16h 53m 47.4s , +34d 09' 47.1" }
         +/- 1.80899661834305 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.869108927567478 [arcmin] (formal 1-sigma fit error)
    SNR: 13.0421790621574
 
  Angular difference between the analysis and refined position is 1.459535 arcmin
 
  Partial Coding Fraction: 0.1367188    [ including projection effects ]

  Duration
     T90: 209 +/- 74.2428447730823
        Measured from: 9
                   to: 218     [s; relative to TRIGTIME]
     T50: 74 +/- 15.2315462117278
        Measured from: 26
                   to: 100     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 18     
                   to: 19     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 4     
                   to: 291     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.458925   2.391896   1.173747   0.509223
           0.167675   0.163898   0.137259   0.111195 [error]
 Peak      0.068577   0.035709   0.000135   0.017264
           0.016608   0.016114   0.012700   0.011725 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  287.000    4.000  291.000
T90   209.000    9.000  218.000
T50    74.000   26.000  100.000
Peak    1.000   18.000   19.000
 
 
====== Spectral Analysis Summary =====================================
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^{Ph_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 both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedo
 
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.744    -0.150      0.147       -           -               -         1.21e-03     -1.15e-04          1.14e-04      65.930   57
CPL     -0.645    -0.731      0.948       53.620      -9.224        25.044      4.99e-03     -3.02e-03          1.24e-02      58.700   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: N/A)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -3.038     -1.319     0.942       -           -               -         3.63e-03     -2.70e-03          3.57e-03      62.990   57
CPL      0.060     -2.081    -0.060       16.358      -0.435        10.402      8.74e-01     -8.74e-01          1.33e+09      61.990   56
 
 
=== 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         PL   5.58e-07  8.84e-07  1.06e-06  2.46e-06  3.21e-06  4.95e-06   erg/cm2
      90%_error_low -7.48e-08 -7.86e-08 -1.31e-07 -5.67e-07 -3.14e-07 -7.05e-07   erg/cm2
      90%_error_hi   7.69e-08  7.86e-08  1.32e-07  6.71e-07  3.17e-07  7.82e-07   erg/cm2
Peak flux       PL   6.71e-01  2.77e-01  6.74e-02  2.00e-02  1.03e+00  1.04e+00   ph/cm2/s
      90%_error_low -2.99e-01 -1.54e-01 -6.74e-02 -2.00e-02 -4.13e-01 -4.18e-01   ph/cm2/s
      90%_error_hi   2.99e-01  1.50e-01  9.86e-02  8.24e-02  4.15e-01  4.23e-01   ph/cm2/s
 
Fluence        CPL   4.99e-07  1.01e-06  1.03e-06  5.15e-07  2.89e-06  3.05e-06   erg/cm2
      90%_error_low -8.55e-08 -1.12e-07 -1.76e-07 -3.33e-07 -3.68e-07 -4.91e-07   erg/cm2
      90%_error_hi   8.65e-08  1.19e-07  1.58e-07  8.29e-07  3.78e-07  8.74e-07   erg/cm2
Peak flux      CPL   7.62e-01  1.86e-01  1.15e-04  8.76e-13  9.47e-01  9.51e-01   ph/cm2/s
      90%_error_low -3.57e-01 -1.86e-01     N/A   -8.76e-13 -3.68e-01 -3.71e-01   ph/cm2/s
      90%_error_hi   3.42e-01  2.85e-01     N/A    -8.76e-13  4.22e-01  4.19e-01   ph/cm2/s
 
======================================================================

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
  253.4476    34.1631   0.0147    38.7182   119.5005         3.7300498     13.042 TRIG_00631051                 
 
Foreground time interval of the image:
  4.000  72.901 (delta_t =  68.901 [sec])
Background time interval of the image:
-463.499 -447.733 (delta_t =  15.766 [sec])
-239.000   4.000 (delta_t = 243.000 [sec])

Light Curves

Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.

Full-time range; 1 s binning

Bokeh Plot

Other quick-look light curves:

64 ms binning (zoomed)
16 ms binning (zoomed)
8 ms binning (zoomed)
2 ms binning (zoomed)
SN=5 or 10 s binning (full-time range)
Raw light curve

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    4.000 sec. to  291.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.7437     ( -0.149564   0.147091 )
Norm@50keV  : 1.21036E-03    ( -0.000115319   0.000114355 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.93 using 59 PHA bins.
# Reduced chi-squared =          1.157 for     57 degrees of freedom 
# Null hypothesis probability =   1.954873e-01
 
Photon flux (15-150 keV)    in 287 sec: 0.163290 ( -0.014667  0.014687 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.20702e-06 ( -3.13734e-07  3.17187e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from    4.000 sec. to  291.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.645486     ( -0.733521   0.945849 )
Epeak [keV] : 53.6203      ( -9.16972 25.0981 )
Norm@50keV  : 4.99381E-03    ( -0.00305206   0.0123891 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.70 using 59 PHA bins.
# Reduced chi-squared =          1.048 for     56 degrees of freedom 
# Null hypothesis probability =   3.766406e-01
 
Photon flux (15-150 keV)    in 287 sec: 0.156940 ( -0.015311  0.015283 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.89015e-06 ( -3.67934e-07  3.77551e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from   18.000 sec. to   19.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -3.0385     ( -1.3188   0.941901 )
Norm@50keV  : 3.63091E-03    ( -0.00269752   0.00357028 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.99 using 59 PHA bins.
# Reduced chi-squared =          1.105 for     57 degrees of freedom 
# Null hypothesis probability =   2.727227e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.02723 ( -0.413175  0.41536 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.44294e-08 ( -2.09304e-08  2.5426e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   18.000 sec. to   19.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 9.27893     ( -11.2817   -9.26101 )
Epeak [keV] : 20.3362      ( -4.41508 6.42137 )
Norm@50keV  : 2.64348E+07    ( -2.38326e+07   1.31073e+09 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.65 using 59 PHA bins.
# Reduced chi-squared =          1.101 for     56 degrees of freedom 
# Null hypothesis probability =   2.810577e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.947239 ( -0.367833  0.422051 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 209.0 sec.
Hardness ratio (energy fluence ratio) = 1.19448372672

S(15-50 keV) vs. S(50-150 keV) plot

S(15-50 keV)  = 1.4414371e-06
S(50-150 keV) = 1.7656544e-06

The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.

Mask shadow pattern

 IMX = -3.947685319726116E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -463.499400 -447.732900 -239.000000 4.000000

# RAcent #  [deg] 244.9985 -15.6596 254.5092  35.3948 256.0040 -37.8568 256.3895 -36.4260 262.9827 -24.7640 264.7163 -44.3314 268.3891  -1.4371 270.3359 -25.0757 270.4063 -25.7213 274.0254 -14.1147 275.9629 -30.3661 284.9334 -24.8027 288.8097  10.9233 299.5700  35.2050 308.1064  40.9546 326.2487  38.1812 262.9952 -33.8497 249.1237 -14.8876 305.5889  63.0902 277.3834 -23.7898 283.5763 -49.4661 UNKNOWN UNKNOWN UNKNOWN

Pre-slew

 Time interval of the image: 4.000000 72.900600

# RAcent #  [deg] 245.0957 -15.7382 254.6260  35.4124 255.9823 -37.9220 256.5290 -36.5010 262.9829 -24.6609 264.8555 -44.4772 268.5024  -1.5146 270.4488 -25.0130 270.3404 -25.7637 274.0593 -14.0226 275.7478 -30.4457 284.9018 -25.0421 288.9249  10.8424 299.7035  35.0819 308.2632  40.9206 326.1567 263.1532 -33.7332 253.4477  34.1630 264.0282 -32.5575

Post-slew

 Time interval of the image: 132.500600 533.000590

# RAcent #  [deg] 244.9777 -15.6358 254.4326  35.3264 268.2566  -1.4467 288.7086  10.8981 299.5953  35.2279 308.1185  40.9590 224.8332  63.7427 262.9803  58.4323 255.6443 -13.1452

IMY = -6.977378766001685E-01 source in the pre-burst/pre-slew/post-slew images

image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 1.2 46.1 41.7 6.6532 9.3 1.6 Sco X-1 4.2 38.7 121.9 1.6944 2.8 4.0 Her X-1 1.6 53.4 11.2 5.7547 7.0 1.1 4U 1700-377 4.2 52.0 11.9 2.0749 2.8 2.2 GX 349+2 63.9 39.3 15.1 0.0575 0.2 1.8 GX 1+4 6.8 55.6 0.2 1.4953 1.7 7.2 4U 1735-44 3.6 19.0 43.0 0.6562 3.1 1.6 SW J1753.5-0127 6.2 36.2 5.4 0.5417 1.8 2.8 GX 5-1 3.7 36.7 4.9 0.9046 3.1 5.8 GRS 1758-258 2.7 24.8 8.5 0.8568 4.2 4.8 GX 17+2 3.6 39.5 -5.1 0.9138 3.2 2.0 H1820-303 5.5 33.1 -17.4 0.5100 2.1 9.0 HT1900.1-2455 1.0 4.8 -141.1 2.2904 11.8 1.5 GRS 1915+105 1.2 30.2 -172.5 2.0818 9.6 1.0 Cyg X-1 3.9 38.7 -168.5 0.8608 3.0 0.2 Cyg X-3 56.7 47.8 -152.4 -0.0974 -0.2 9.2 Cyg X-2 6.4 46.9 7.9 0.7607 1.8 1.0 GX 354-0 2.6 42.2 39.8 2.1580 4.5 ------ UNKNOWN 2.4 56.9 174.0 6.2109 4.9 ------ UNKNOWN 2.0 32.8 -4.6 1.3989 5.7 ------ UNKNOWN 2.6 57.7 -16.2 3.9122 4.4 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 7.7 46.0 41.5 -0.5539 -1.5 8.9 Sco X-1 5.0 38.7 122.0 -0.6364 -2.3 9.2 Her X-1 53.8 53.4 11.2 -0.0909 -0.2 4.7 4U 1700-377 7.0 52.0 11.8 0.5969 1.6 6.5 GX 349+2 4.4 39.2 15.2 0.4230 2.6 5.3 GX 1+4 6.2 55.7 0.0 0.7913 1.8 5.1 4U 1735-44 15.7 18.9 42.6 0.0776 0.7 8.9 SW J1753.5-0127 5.6 36.1 5.3 -0.2572 -2.0 9.8 GX 5-1 9.4 36.8 4.9 0.1614 1.2 2.4 GRS 1758-258 45.1 24.7 8.5 0.0253 0.3 3.2 GX 17+2 6.4 39.7 -4.9 0.2429 1.8 10.3 H1820-303 4.4 33.3 -17.3 0.3024 2.6 10.3 HT1900.1-2455 6.5 4.9 -139.6 -0.1568 -1.8 9.7 GRS 1915+105 5.4 30.1 -172.2 -0.2189 -2.1 9.1 Cyg X-1 11.1 38.8 -168.3 -0.1284 -1.0 7.2 Cyg X-3 38.3361 2700.0 47.8 -152.7 0.0002 0.0 1.1 Cyg X-2 11.1 46.7 7.8 0.2189 1.0 10.2 GX 354-0 0.9 38.7 119.5 3.7293 13.0 ------ UNKNOWN 2.0 45.3 7.7 1.0528 5.7 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.7 50.5 -9.3 8.9817 16.8 0.3 Sco X-1 1.2 1.4 -164.9 2.2631 9.8 1.6 Her X-1 4.7 38.2 -44.3 0.9342 2.5 6.7 SW J1753.5-0127 3.0 39.7 -82.5 3.4297 3.9 6.0 GRS 1915+105 1.5 37.6 -125.1 3.3514 8.0 1.6 Cyg X-1 14.2 43.2 -135.7 0.4182 0.8 0.5 Cyg X-3 2.5 34.4 138.1 1.7711 4.6 ------ UNKNOWN 3.3 25.1 171.9 0.9261 3.5 ------ UNKNOWN 2.4 47.4 -22.8 2.2420 4.8 ------ UNKNOWN

Analysis Summary

Notes:

Image

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

Light Curves

Full-time range; 1 s binning

Other quick-look light curves:

64 ms binning (zoomed) 16 ms binning (zoomed) 8 ms binning (zoomed) 2 ms binning (zoomed) SN=5 or 10 s binning (full-time range) Raw light curve

Spectra

Notes:

Time averaged spectrum fit using the average DRM

Power-law model

Cutoff power-law model

1-s peak spectrum fit

Power-law model

Cutoff power-law model

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

S(15-50 keV) vs. S(50-150 keV) plot

Mask shadow pattern

Spacecraft aspect plot

Bright

64 ms binning (zoomed)
16 ms binning (zoomed)
8 ms binning (zoomed)
2 ms binning (zoomed)
SN=5 or 10 s binning (full-time range)
Raw light curve