Gamma-ray Burst 190110A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 10 Jan 19 17:25:03 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     883012,   Seg_Num: 0
  GRB_RA:          276.882d {+18h 27m 32s} (J2000),
                   277.268d {+18h 29m 04s} (current),
                   275.864d {+18h 23m 27s} (1950)
  GRB_DEC:         -53.676d {-53d 40' 34"} (J2000),
                   -53.663d {-53d 39' 47"} (current),
                   -53.707d {-53d 42' 26"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       1695 [cnts]    Image_Peak=100 [image_cnts]
  TRIGGER_DUR:     0.512 [sec] 
  TRIGGER_INDEX:   41     E_range: 25-100 keV
  BKG_INTEN:       18998 [cnts]
  BKG_TIME:        62673.77 SOD {17:24:33.77} UT
  BKG_DUR:         8 [sec]
  GRB_DATE:        18493 TJD;    10 DOY;   19/01/10
  GRB_TIME:        62688.30 SOD {17:24:48.30} UT
  GRB_PHI:         -48.90 [deg]
  GRB_THETA:        35.15 [deg]
  SOLN_STATUS:     0x20000003
  RATE_SIGNIF:     14.73 [sigma]
  IMAGE_SIGNIF:    7.06 [sigma]
  MERIT_PARAMS:     +1  +0  +0  -1  +2  -3 -100  +0 -83  +0 
  SUN_POSTN:       291.82d {+19h 27m 17s}  -21.92d {-21d 55' 14"}
  SUN_DIST:         33.61 [deg]   Sun_angle= 1.0 [hr] (West of Sun)
  MOON_POSTN:      343.60d {+22h 54m 25s}  -11.02d {-11d 01' 00"}
  MOON_DIST:        67.21 [deg]
  MOON_ILLUM:      18 [%]
  GAL_COORDS:      341.26,-18.21 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      274.72,-30.35 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Coordinates.  
  COMMENTS:        This is a rate trigger.  
  COMMENTS:        A point_source was found.  
  COMMENTS:        This does not match any source in the on-board catalog.  
  COMMENTS:        This does not match any source in the ground catalog.  
  COMMENTS:        This is a GRB.  
  COMMENTS:        This trigger occurred at longitude,latitude = 273.26,-5.33 [deg].  
  COMMENTS:           
  COMMENTS:        NOTE: This BAT event is temporally(1.0<100sec) coincident with the FERMI_GBM event (trignum=568833894).  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/FERMI NOTICE
  NOTICE_DATE:     Thu 10 Jan 19 17:24:53 UT
  NOTICE_TYPE:     Fermi-GBM Flight Position
  RECORD_NUM:      46
  TRIGGER_NUM:     568833894
  GRB_RA:          281.117d {+18h 44m 28s} (J2000),
                   281.555d {+18h 46m 13s} (current),
                   279.964d {+18h 39m 51s} (1950)
  GRB_DEC:         -61.867d {-61d 52' 00"} (J2000),
                   -61.846d {-61d 50' 44"} (current),
                   -61.918d {-61d 55' 02"} (1950)
  GRB_ERROR:       12.33 [deg radius, statistical plus systematic]
  GRB_INTEN:       225 [cnts/sec]
  DATA_SIGNIF:     9.70 [sigma]
  INTEG_TIME:      1.024 [sec]
  GRB_DATE:        18493 TJD;    10 DOY;   19/01/10
  GRB_TIME:        62689.21 SOD {17:24:49.21} UT
  GRB_PHI:         321.00 [deg]
  GRB_THETA:        50.00 [deg]
  DATA_TIME_SCALE: 1.0240 [sec]
  HARD_RATIO:      1.43
  LOC_ALGORITHM:   3 (version number of)
  MOST_LIKELY:      90%  GRB
  2nd_MOST_LIKELY:   7%  Solar Flare
  DETECTORS:       0,0,0, 1,1,1, 0,0,0, 0,0,0, 0,0,
  SUN_POSTN:       291.82d {+19h 27m 17s}  -21.92d {-21d 55' 14"}
  SUN_DIST:         40.55 [deg]   Sun_angle= 0.7 [hr] (West of Sun)
  MOON_POSTN:      343.60d {+22h 54m 25s}  -11.02d {-11d 01' 01"}
  MOON_DIST:        67.32 [deg]
  MOON_ILLUM:      18 [%]
  GAL_COORDS:      333.71,-22.91 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      276.69,-38.69 [deg] ecliptic lon,lat of the burst (or transient)
  LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190110726/quicklook/glg_lc_medres34_bn190110726.gif
  COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
  COMMENTS:        This trigger occurred at longitude,latitude = 219.63,7.32 [deg].  
  COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
  

• GCN NOTICE
  

  TITLE:           GCN/FERMI NOTICE
  NOTICE_DATE:     Thu 10 Jan 19 17:25:01 UT
  NOTICE_TYPE:     Fermi-GBM Flight Position
  RECORD_NUM:      59
  TRIGGER_NUM:     568833894
  GRB_RA:          281.417d {+18h 45m 40s} (J2000),
                   281.854d {+18h 47m 25s} (current),
                   280.265d {+18h 41m 04s} (1950)
  GRB_DEC:         -61.817d {-61d 49' 00"} (J2000),
                   -61.795d {-61d 47' 42"} (current),
                   -61.869d {-61d 52' 08"} (1950)
  GRB_ERROR:       5.88 [deg radius, statistical plus systematic]
  GRB_INTEN:       672 [cnts/sec]
  DATA_SIGNIF:     26.60 [sigma]
  INTEG_TIME:      1.024 [sec]
  GRB_DATE:        18493 TJD;    10 DOY;   19/01/10
  GRB_TIME:        62689.21 SOD {17:24:49.21} UT
  GRB_PHI:         321.00 [deg]
  GRB_THETA:        50.00 [deg]
  DATA_TIME_SCALE: 1.0240 [sec]
  HARD_RATIO:      1.07
  LOC_ALGORITHM:   3 (version number of)
  MOST_LIKELY:      95%  GRB
  2nd_MOST_LIKELY:   2%  Solar Flare
  DETECTORS:       0,0,0, 1,1,1, 0,0,0, 0,0,0, 0,0,
  SUN_POSTN:       291.82d {+19h 27m 17s}  -21.92d {-21d 55' 14"}
  SUN_DIST:         40.46 [deg]   Sun_angle= 0.7 [hr] (West of Sun)
  MOON_POSTN:      343.60d {+22h 54m 25s}  -11.02d {-11d 01' 00"}
  MOON_DIST:        67.17 [deg]
  MOON_ILLUM:      18 [%]
  GAL_COORDS:      333.80,-23.04 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      276.88,-38.65 [deg] ecliptic lon,lat of the burst (or transient)
  LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190110726/quicklook/glg_lc_medres34_bn190110726.gif
  COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
  COMMENTS:        This trigger occurred at longitude,latitude = 219.63,7.32 [deg].  
  COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
  

• GCN NOTICE
  

  TITLE:           GCN/FERMI NOTICE
  NOTICE_DATE:     Thu 10 Jan 19 17:25:06 UT
  NOTICE_TYPE:     Fermi-GBM Ground Position
  RECORD_NUM:      58
  TRIGGER_NUM:     568833894
  GRB_RA:          271.410d {+18h 05m 38s} (J2000),
                   271.786d {+18h 07m 09s} (current),
                   270.422d {+18h 01m 41s} (1950)
  GRB_DEC:         -51.330d {-51d 19' 47"} (J2000),
                   -51.327d {-51d 19' 36"} (current),
                   -51.334d {-51d 20' 03"} (1950)
  GRB_ERROR:       9.14 [deg radius, statistical only]
  DATA_SIGNIF:     17.00 [sigma]
  DATA_INTERVAL:   0.256 [sec]
  GRB_DATE:        18493 TJD;    10 DOY;   19/01/10
  GRB_TIME:        62689.21 SOD {17:24:49.21} UT
  GRB_PHI:         336.00 [deg]
  GRB_THETA:        46.00 [deg]
  E_RANGE:         44.032 - 279.965 [keV]
  LOC_ALGORITHM:   4153 (Gnd S/W Version number)
  SUN_POSTN:       291.82d {+19h 27m 17s}  -21.92d {-21d 55' 14"}
  SUN_DIST:         33.27 [deg]   Sun_angle= 1.3 [hr] (West of Sun)
  MOON_POSTN:      343.60d {+22h 54m 25s}  -11.02d {-11d 00' 59"}
  MOON_DIST:        70.09 [deg]
  MOON_ILLUM:      18 [%]
  GAL_COORDS:      342.11,-14.22 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      271.00,-27.90 [deg] ecliptic lon,lat of the burst (or transient)
  LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190110726/quicklook/glg_lc_medres34_bn190110726.gif
  POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_568833894.fits
  COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
  COMMENTS:        In the LAT Field-of-view.  
  COMMENTS:        This Notice was ground-generated -- not flight-generated.  
  COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
  COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
  COMMENTS:           
  COMMENTS:        NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=883012).  
  

• GCN NOTICE
  

  TITLE:           GCN/FERMI NOTICE
  NOTICE_DATE:     Thu 10 Jan 19 17:25:34 UT
  NOTICE_TYPE:     Fermi-GBM Ground Position
  RECORD_NUM:      0
  TRIGGER_NUM:     568833894
  GRB_RA:          268.240d {+17h 52m 58s} (J2000),
                   268.624d {+17h 54m 30s} (current),
                   267.230d {+17h 48m 55s} (1950)
  GRB_DEC:         -53.000d {-53d 00' 00"} (J2000),
                   -53.003d {-53d 00' 09"} (current),
                   -52.989d {-52d 59' 19"} (1950)
  GRB_ERROR:       3.55 [deg radius, statistical only]
  DATA_SIGNIF:     17.70 [sigma]
  DATA_INTERVAL:   4.096 [sec]
  GRB_DATE:        18493 TJD;    10 DOY;   19/01/10
  GRB_TIME:        62689.21 SOD {17:24:49.21} UT
  GRB_PHI:         334.00 [deg]
  GRB_THETA:        44.00 [deg]
  E_RANGE:         44.032 - 279.965 [keV]
  LOC_ALGORITHM:   41531 (Gnd S/W Version number)
  SUN_POSTN:       291.82d {+19h 27m 17s}  -21.92d {-21d 55' 14"}
  SUN_DIST:         35.78 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
  MOON_POSTN:      343.61d {+22h 54m 26s}  -11.02d {-11d 00' 54"}
  MOON_DIST:        72.20 [deg]
  MOON_ILLUM:      18 [%]
  GAL_COORDS:      339.67,-13.24 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      268.78,-29.57 [deg] ecliptic lon,lat of the burst (or transient)
  LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190110726/quicklook/glg_lc_medres34_bn190110726.gif
  POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_568833894.fits
  COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
  COMMENTS:        In the LAT Field-of-view.  
  COMMENTS:        This is likely a Long GRB.  
  COMMENTS:        This Notice was ground-generated -- not flight-generated.  
  COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
  COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
  COMMENTS:           
  COMMENTS:        NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=883012).  
  

• GCN NOTICE
  

  TITLE:           GCN/FERMI NOTICE
  NOTICE_DATE:     Thu 10 Jan 19 17:25:39 UT
  NOTICE_TYPE:     Fermi-GBM Ground Position
  RECORD_NUM:      1
  TRIGGER_NUM:     568833894
  GRB_RA:          269.680d {+17h 58m 43s} (J2000),
                   270.057d {+18h 00m 14s} (current),
                   268.690d {+17h 54m 46s} (1950)
  GRB_DEC:         -51.490d {-51d 29' 23"} (J2000),
                   -51.490d {-51d 29' 24"} (current),
                   -51.486d {-51d 29' 09"} (1950)
  GRB_ERROR:       2.59 [deg radius, statistical only]
  DATA_SIGNIF:     32.70 [sigma]
  DATA_INTERVAL:   6.144 [sec]
  GRB_DATE:        18493 TJD;    10 DOY;   19/01/10
  GRB_TIME:        62689.21 SOD {17:24:49.21} UT
  GRB_PHI:         336.00 [deg]
  GRB_THETA:        45.00 [deg]
  E_RANGE:         44.032 - 279.965 [keV]
  LOC_ALGORITHM:   41531 (Gnd S/W Version number)
  SUN_POSTN:       291.82d {+19h 27m 18s}  -21.92d {-21d 55' 14"}
  SUN_DIST:         34.05 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
  MOON_POSTN:      343.61d {+22h 54m 26s}  -11.02d {-11d 00' 54"}
  MOON_DIST:        71.18 [deg]
  MOON_ILLUM:      18 [%]
  GAL_COORDS:      341.47,-13.32 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      269.77,-28.05 [deg] ecliptic lon,lat of the burst (or transient)
  LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190110726/quicklook/glg_lc_medres34_bn190110726.gif
  POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_568833894.fits
  COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
  COMMENTS:        In the LAT Field-of-view.  
  COMMENTS:        This is likely a Long GRB.  
  COMMENTS:        This Notice was ground-generated -- not flight-generated.  
  COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
  COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
  COMMENTS:           
  COMMENTS:        NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=883012).  
  

• GCN NOTICE
  

  TITLE:           GCN/FERMI NOTICE
  NOTICE_DATE:     Thu 10 Jan 19 17:33:52 UT
  NOTICE_TYPE:     Fermi-GBM Final Position
  RECORD_NUM:      0
  TRIGGER_NUM:     568833894
  GRB_RA:          272.460d {+18h 09m 50s} (J2000),
                   272.829d {+18h 11m 19s} (current),
                   271.491d {+18h 05m 58s} (1950)
  GRB_DEC:         -49.740d {-49d 44' 23"} (J2000),
                   -49.735d {-49d 44' 05"} (current),
                   -49.750d {-49d 44' 58"} (1950)
  GRB_ERROR:       3.55 [deg radius, statistical only]
  GRB_DATE:        18493 TJD;    10 DOY;   19/01/10
  GRB_TIME:        62689.21 SOD {17:24:49.21} UT
  GRB_PHI:         338.00 [deg]
  GRB_THETA:        47.00 [deg]
  E_RANGE:         44.032 - 279.965 [keV]
  LOC_ALGORITHM:   41531 (Gnd S/W Version number)
  SUN_POSTN:       291.83d {+19h 27m 19s}  -21.92d {-21d 55' 11"}
  SUN_DIST:         31.59 [deg]   Sun_angle= 1.3 [hr] (West of Sun)
  MOON_POSTN:      343.67d {+22h 54m 42s}  -10.99d {-10d 59' 36"}
  MOON_DIST:        69.29 [deg]
  MOON_ILLUM:      18 [%]
  GAL_COORDS:      343.89,-14.13 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      271.77,-26.32 [deg] ecliptic lon,lat of the burst (or transient)
  LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190110726/quicklook/glg_lc_medres34_bn190110726.gif
  LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190110726/quicklook/glg_locplot_all_bn190110726.png
  COMMENTS:        Fermi-GBM Final Position.  
  COMMENTS:        This Notice was ground-generated -- not flight-generated.  
  COMMENTS:        The LC_URL file should be available by the time this FINAL notice is produced.  
  COMMENTS:        This notice was generated completely by automated pipeline processing.  
  COMMENTS:        In the LAT Field-of-view.  
  COMMENTS:        This is likely a Long GRB.  
  COMMENTS:           
  COMMENTS:        NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=883012).  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 10 Jan 19 17:29:59 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     883012,   Seg_Num: 0
  GRB_RA:          276.882d {+18h 27m 32s} (J2000),
                   277.268d {+18h 29m 04s} (current),
                   275.864d {+18h 23m 27s} (1950)
  GRB_DEC:         -53.676d {-53d 40' 34"} (J2000),
                   -53.663d {-53d 39' 47"} (current),
                   -53.707d {-53d 42' 26"} (1950)
  GRB_DATE:        18493 TJD;    10 DOY;   19/01/10
  GRB_TIME:        62688.30 SOD {17:24:48.30} UT
  TRIGGER_INDEX:   41
  GRB_PHI:         -48.90 [deg]
  GRB_THETA:        35.15 [deg]
  DELTA_TIME:      -11.00 [sec]
  TRIGGER_DUR:     0.512 [sec] 
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     14.73 [sigma]
  IMAGE_SIGNIF:    7.06 [sigma]
  LC_URL:          sw00883012000msb.lc
  SUN_POSTN:       291.83d {+19h 27m 18s}  -21.92d {-21d 55' 12"}
  SUN_DIST:         33.62 [deg]   Sun_angle= 1.0 [hr] (West of Sun)
  MOON_POSTN:      343.64d {+22h 54m 34s}  -11.00d {-11d 00' 13"}
  MOON_DIST:        67.24 [deg]
  MOON_ILLUM:      18 [%]
  GAL_COORDS:      341.26,-18.21 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      274.72,-30.35 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Lightcurve.  
  COMMENTS:           
  COMMENTS:        The next comments were copied from the BAT_POS Notice:  
  COMMENTS:        This is a rate trigger.  
  COMMENTS:        A point_source was found.  
  COMMENTS:        This does not match any source in the on-board catalog.  
  COMMENTS:        This does not match any source in the ground catalog.  
  COMMENTS:        This is a GRB.  
  COMMENTS:        This trigger occurred at longitude,latitude = 273.26,-5.33 [deg].  
  

  
• GCN Circular #23670
  B. Sbarufatti (PSU), S. D. Barthelmy (GSFC), J.D. Gropp (PSU), J. A. Kennea (PSU), N. J. Klingler (PSU), M. J. Moss (George Washington University), K. L. Page (U Leicester), D. M. Palmer (LANL), M. H. Siegel (PSU) and A. Tohuvavohu (PSU) report on behalf of the Neil Gehrels Swift Observatory Team:
  At 17:24:48 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 190110A (trigger=883012). Swift did not slew due to an observing constraint. The BAT on-board calculated location is RA, Dec 276.882, -53.676, which is

     RA(J2000)  =  18h 27m 32s
     Dec(J2000) = -53d 40' 34"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows several peaks with a total duration of about 15 sec. The peak count rate was ~7000 counts/sec (15-350 keV), at ~5 sec after the trigger.
  Due to a Sun observing constraint, Swift cannot slew to the BAT position until 16:10 UT on 2019 February 01. There will thus be no XRT or UVOT data for this trigger before this time.
  Burst Advocate for this burst is B. Sbarufatti (bxs60 AT psu.edu). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
• GCN Circular #23671
  S.Poolakkil(UAH) and C. Meegan (UAH) report on behalf of the Fermi GBM Team:
  "At 17:24:49.21 UT on 10 January 2019, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 190110A(trigger 568833894/ 190110726), which was also detected by the Swift/BAT (Sbarufatti et al. 2019, GCN 23670). The GBM on-ground location is consistent with the Swift position.
  The angle from the Fermi LAT boresight at the GBM trigger time is 50 degrees.
  The GBM light curve consists of a single bright peak with a duration (T90) of about 9 s (50-300 keV). The time-averaged spectrum from T0-2.04 s to T0+10.24 s is best fit by a Band function with Epeak = 73 +/- 8 keV, alpha = -0.44 +/- 0.20 and beta = -2.12 +/- 0.08.
  The event fluence (10-1000 keV) in this time interval is (5.331 +/- 0.209)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+3.71 s in the 10-1000 keV band is 14.7 +/- 0.3 ph/s/cm^2.
  The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
• GCN Circular #23674
  T. N. Ukwatta (LANL), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), B. Sbarufatti (PSU), M. Stamatikos (OSU) (i.e. the Swift-BAT team):
  Using the data set from T-240 to T+180 sec from the recent telemetry downlink, we report further analysis of BAT GRB 190110A (trigger #883012) (Sbarufatti et al., GCN Circ. 23670). The BAT ground-calculated position is RA, Dec = 276.939, -53.643 deg which is

    RA(J2000)  =  18h 27m 45.3s
    Dec(J2000) = -53d 38' 34.3"
  

  with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 43%.
  The mask-weighted light curve shows several overlapping peaks that starts at ~ T-1 s and ends at ~ T+11 s. The main peak occurs at ~T+5 s. T90 (15-350 keV) is 9.3 +- 0.8 sec (estimated error including systematics).
  The time-averaged spectrum from T-0.8 to T+11.0 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.66 +- 0.07. The fluence in the 15-150 keV band is 2.5 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+4.66 sec in the 15-150 keV band is 9.0 +- 0.5 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
  The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/883012/BA/
• GCN Circular #23675
  A. Kozlova, S. Golenetskii, R. Aptekar, D. Frederiks, M. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, report:
  The long-duration GRB 190110A (Swift-BAT detection and analysis: Sbarufatti et al., GCN Circ. 23670; Ukwatta et al., GCN Circ. 23674; Fermi-GBM detection: Poolakkil & Meegan, GCN Circ. 23671) triggered Konus-Wind at T0=62689.767 s UT (17:24:49.767).
  The burst light curve shows a single pulse started at ~T0-3.5 s with a total duration of ~5 s. The emission is seen up to ~8 MeV.
  As observed by Konus-Wind, the burst had a fluence of 3.39(-0.51,+0.88)x10^-6 erg/cm2, and a 64-ms peak flux, measured from T0+0.158 s, of 2.21(-0.93,+1.71)x10^-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range).
  The time-averaged spectrum of the burst (measured from T0 to T0+8.448 s) is best fit in the 20 keV - 8 MeV range by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -1.44(-0.46,+0.58) and Ep = 132(-60,+111) keV (chi2 = 62/81 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -2.4 (chi2 = 62/80 dof).
  The spectrum near the maximum count rate (measured from T0+0.128 to T0+0.256 s) is best fit in the 20 keV - 8 MeV range by a power law with exponential cutoff model with alpha = -0.87(-0.82,+1.27) and Ep = 165(-53,+382) keV (chi2 = 12/18 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -2.0 (chi2 = 12/17 dof).
  The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB190110_T62689/
  All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.
• GCN Circular #23676
  Q. Luo, C. K. Li, X. B. Li, G. Li, J. Y. Liao, S. L. Xiong, C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, X. F. Lu, J. L. Zhao, A. M. Zhang, Y. F. Zhang, C. L. Zou (IHEP), Y. J. Jin, Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song, M. Wu, Y. P. Xu, S. N. Zhang (IHEP), report on behalf of the Insight-HXMT team:
  At 2019-01-10T17:24:48.30 (T0), the Insight-HXMT/HE detected GRB 190110A(trigger ID: HEB190110725) in a routine search of the data, which was also triggered by the Swift/BAT (Sbarufatti et al. 2019, GCN 23670),Fermi/GBM(S.Poolakkil et al. ,GCN 23671) and Konus-Wind(A. Kozlova et al. ,GCN 23675).
  The Insight-HXMT/HE light curve mainly consists of multiple pulses with a duration (T90) of 7.19 s measured from T0-0.18 s. The 1-s peak rate, measured from T0+4.45 s, is 1630.6 cnts/sec. The total counts from this burst is 3920.2 counts. URL_LC: http://www.hxmt.org/images/GRB/HEB190110725_lc.jpg
  All measurements above are made with the CsI detectors operating in the regular mode with the energy range of about 80-800 keV (record energy). Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed inside of the telescope.
  The analysis results presented above are preliminary, final results will be published elsewhere.
  Insight-HXMT is the first Chinese space X-ray telescope, which was fundedjointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information about it could be found at: http://www.hxmt.org.