Transient Analysis Summary

Summary of the Input Information

T0: 591543364.968000054 [MET] (2019-09-30T13:35:41.246 UTC)
Search time window: T0 +/- 100.0 s
Input source: RA=0.0, DEC=0.0 (source location is randomly seleected, since the true location is unknown.)
Input image: /local/data/bat2/batusers/batgroup/BAT_GW/results/S190930s/bayestar.fits.gz

FOV Check

The input source is out of the BAT FOV
The input image does not overlaps with the BAT FOV
Max probability in LIGO map: 5.5997989347694914e-05
Sum of (BAT pcode)*(LIGO probability) of the entire LIGO map: 0.0010086751657029597
The integrated LIGO localization probability that are in BAT FOV (with pcode > 10%): 0.003995932703484544
The integrated probability of Phil's convolved map that are in BAT FOV (with pcode > 10%): 0.004457762170013353
The integrated LIGO localization probability that are outside of the BAT FOV (with pcode > 10%) but above the Earth's limb: 0.9960031560541163

RED: BAT FOV (the brighter/whiter color refers to higher partial coding fraction).

YELLOW: Earth

BLUE: LIGO probability map

GREEN STAR: Input source (location is randomly seleected unless the true source location is available.)

Click here for the BAT GCN circular template

Raw Light Curves

Quad-rate light curves (with 1.6 s time bin)

64-ms light curves

Detection > 5-sigma found:
## Time  Net_count SNR
-95.9760000705719 488.79424 18.64383697507684
-95.91200006008148 760.79424 29.018598464125688

1-s light curves

Detection > 5-sigma found:
## Time  Net_count SNR
-95.96800005435944 4244.675 12.358334425746751

Event data image search

Event data found. The analysis results are listing below.

 
## list of detected sources for 00926515005
 
########################################
 
########################################
## tstart_since_T0: 0.0
## tstop_since_T0: 0.1

                 TIME                           NAME     RA_OBJ    DEC_OBJ        SNR
                    s                                       deg        deg           
  1  591543364.968000 UNKNOWN                           57.6533   -51.0796      3.991
## tstart_since_T0: -2.0
## tstop_since_T0: 8.0

                 TIME                           NAME     RA_OBJ    DEC_OBJ        SNR
                    s                                       deg        deg           
  1  591543362.968000 UNKNOWN                          322.7268   -34.4455      6.283
  2  591543362.968000 UNKNOWN                           82.8522   -45.8833      5.307
  3  591543362.968000 UNKNOWN                          284.8055   -53.0180      5.301
########################################
 
########################################
## tstart_since_T0: -100.968
## tstop_since_T0: 99.102

                 TIME                           NAME     RA_OBJ    DEC_OBJ        SNR
                    s                                       deg        deg           
  1  591543264.000000 UNKNOWN                           61.6003   -17.0083      3.735
  2  591543264.000000 UNKNOWN                          311.1291   -42.7189      4.231
  3  591543264.000000 UNKNOWN                          289.6601   -36.1704      2.877
########################################

Investigation of the detector glitch around T-95.85 s

The short spike at ~T-95.9 s in 15-25 keV is due to detector glitch.

Reasons:
1. It is extremely short (~ 40 ms; see the zoomed-in light curve below).
2. The counts are from a few dozen of specific detectors (see the TIME vs DetID and the DPI plot below).

Here is the zoomed-in light curve of the short spike from T-95.95 s to T-95.85 s in 15-25 keV:


Here is the TIME vs DetID plot from T-95.95 s to T-95.85 s:

Last update: Mon Sep 30 14:10:08 EDT 2019