Gamma-ray Burst 160223B

(All information courtesy of the instrument teams.)

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Tue 23 Feb 16 09:59:18 UT
NOTICE_TYPE:    INTEGRAL Wakeup
TRIGGER_NUM:    7380,   Sub_Num: 1
GRB_RA:          94.9760d {+06h 19m 54s} (J2000),
                 95.2419d {+06h 20m 58s} (current),
                 94.1524d {+06h 16m 37s} (1950)
GRB_DEC:        +33.4064d {+33d 24' 23"} (J2000),
                +33.3984d {+33d 23' 54"} (current),
                +33.4286d {+33d 25' 43"} (1950)
GRB_ERROR:      3.12 [arcmin, radius, statistical only]
GRB_INTEN:      9.25 [sigma]
GRB_TIME:       35951.45 SOD {09:59:11.45} UT
GRB_DATE:       17441 TJD;    54 DOY;   16/02/23
SC_RA:           88.73 [deg] (J2000)
SC_DEC:          21.76 [deg] (J2000)
SUN_POSTN:      336.10d {+22h 24m 23s}   -9.96d {-09d 57' 43"}
SUN_DIST:       119.72 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:     162.56d {+10h 50m 14s}   +6.50d {+06d 30' 10"}
MOON_DIST:       67.53 [deg]
GAL_COORDS:     179.68,  8.58 [deg] galactic lon,lat of the burst
ECL_COORDS:      94.22, 10.04 [deg] ecliptic lon,lat of the burst
COMMENTS:       INTEGRAL GRB Coordinates.  
COMMENTS:       Time_Scale=10.0000 and Time_Error=10.0000.  
COMMENTS:       Possibly real GRB event  
COMMENTS:          
COMMENTS:       NOTE: This INTEGRAL event is temporally(10.0<100sec) coincident with the FERMI_GBM event (trignum=477914345).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 23 Feb 16 09:59:40 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      57
TRIGGER_NUM:     477914345
GRB_RA:           86.320d {+05h 45m 17s} (J2000),
                  86.604d {+05h 46m 25s} (current),
                  85.440d {+05h 41m 46s} (1950)
GRB_DEC:         +40.810d {+40d 48' 36"} (J2000),
                 +40.816d {+40d 48' 56"} (current),
                 +40.790d {+40d 47' 24"} (1950)
GRB_ERROR:       3.92 [deg radius, statistical only]
DATA_SIGNIF:     12.20 [sigma]
DATA_INTERVAL:   2.048 [sec]
GRB_DATE:        17441 TJD;    54 DOY;   16/02/23
GRB_TIME:        35941.51 SOD {09:59:01.51} UT
GRB_PHI:          95.00 [deg]
GRB_THETA:        44.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4153 (Gnd S/W Version number)
SUN_POSTN:       336.10d {+22h 24m 23s}   -9.96d {-09d 57' 43"}
SUN_DIST:        111.98 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:      162.56d {+10h 50m 15s}   +6.50d {+06d 30' 06"}
MOON_DIST:        75.14 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      169.79,  6.10 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       87.08, 17.41 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2016/bn160223416/quicklook/glg_lc_medres34_bn160223416.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_477914345.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 ~4 min after the notice.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the CALET event (trignum=1140256490).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 23 Feb 16 09:59:27 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      48
TRIGGER_NUM:     477914345
GRB_RA:           87.467d {+05h 49m 52s} (J2000),
                  87.763d {+05h 51m 03s} (current),
                  86.551d {+05h 46m 12s} (1950)
GRB_DEC:         +44.750d {+44d 45' 00"} (J2000),
                 +44.754d {+44d 45' 13"} (current),
                 +44.735d {+44d 44' 08"} (1950)
GRB_ERROR:       9.73 [deg radius, statistical plus systematic]
GRB_INTEN:       198 [cnts/sec]
DATA_SIGNIF:     9.90 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        17441 TJD;    54 DOY;   16/02/23
GRB_TIME:        35941.51 SOD {09:59:01.51} UT
GRB_PHI:          94.00 [deg]
GRB_THETA:        40.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      0.47
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      84%  GRB
2nd_MOST_LIKELY:  12%  GRO_J0422_32
DETECTORS:       0,0,0, 0,0,0, 0,0,0, 1,1,0, 0,0,
SUN_POSTN:       336.10d {+22h 24m 23s}   -9.96d {-09d 57' 43"}
SUN_DIST:        112.34 [deg]   Sun_angle= -7.4 [hr] (East of Sun)
MOON_POSTN:      162.56d {+10h 50m 15s}   +6.50d {+06d 30' 08"}
MOON_DIST:        74.65 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      166.79,  8.82 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       88.07, 21.33 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2016/bn160223416/quicklook/glg_lc_medres34_bn160223416.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 189.60,24.90 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(10.0<100sec) coincident with the INTEGRAL event (trignum=7380).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 23 Feb 16 10:00:37 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      2
TRIGGER_NUM:     477914345
GRB_RA:           92.900d {+06h 11m 36s} (J2000),
                  93.188d {+06h 12m 45s} (current),
                  92.007d {+06h 08m 02s} (1950)
GRB_DEC:         +42.270d {+42d 16' 12"} (J2000),
                 +42.265d {+42d 15' 55"} (current),
                 +42.282d {+42d 16' 55"} (1950)
GRB_ERROR:       2.82 [deg radius, statistical only]
DATA_SIGNIF:     19.50 [sigma]
DATA_INTERVAL:   13.312 [sec]
GRB_DATE:        17441 TJD;    54 DOY;   16/02/23
GRB_TIME:        35941.51 SOD {09:59:01.51} UT
GRB_PHI:         101.00 [deg]
GRB_THETA:        41.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41531 (Gnd S/W Version number)
SUN_POSTN:       336.10d {+22h 24m 23s}   -9.96d {-09d 57' 42"}
SUN_DIST:        116.63 [deg]   Sun_angle= -7.8 [hr] (East of Sun)
MOON_POSTN:      162.57d {+10h 50m 17s}   +6.50d {+06d 29' 58"}
MOON_DIST:        70.42 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      170.90, 11.12 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       92.27, 18.85 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2016/bn160223416/quicklook/glg_lc_medres34_bn160223416.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_477914345.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 ~4 min after the notice.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the CALET event (trignum=1140256490).

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Tue 23 Feb 16 10:41:24 UT
NOTICE_TYPE:    INTEGRAL Offline
TRIGGER_NUM:    7380,   Sub_Num: 2
GRB_RA:          94.9937d {+06h 19m 58s} (J2000),
                 95.2596d {+06h 21m 02s} (current),
                 94.1701d {+06h 16m 41s} (1950)
GRB_DEC:        +33.4074d {+33d 24' 27"} (J2000),
                +33.3994d {+33d 23' 58"} (current),
                +33.4297d {+33d 25' 47"} (1950)
GRB_ERROR:      2.50 [arcmin, radius, statistical only]
GRB_INTEN:      9.25 [sigma]
GRB_TIME:       35951.45 SOD {09:59:11.45} UT
GRB_DATE:       17441 TJD;    54 DOY;   16/02/23
SC_RA:           88.73 [deg] (J2000)
SC_DEC:          21.76 [deg] (J2000)
SUN_POSTN:      336.12d {+22h 24m 30s}   -9.95d {-09d 57' 05"}
SUN_DIST:       119.70 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:     162.90d {+10h 51m 37s}   +6.40d {+06d 23' 50"}
MOON_DIST:       67.86 [deg]
GAL_COORDS:     179.68,  8.59 [deg] galactic lon,lat of the burst
ECL_COORDS:      94.23, 10.04 [deg] ecliptic lon,lat of the burst
COMMENTS:       INTEGRAL GRB Coordinates.  
COMMENTS:       Time_Scale=10.0000 and Time_Error=10.0000.  
COMMENTS:       refined_coordinates_after_offline_analysis  
COMMENTS:          
COMMENTS:       NOTE: This INTEGRAL event is temporally(10.0<100sec) coincident with the FERMI_GBM event (trignum=477914345).

GCN Circular #19059
D.Gotz (CEA, Saclay), S.Mereghetti (IASF-Milano), C.Ferrigno, E.Bozzo, S. Fotopoulou(ISDC, Versoix), and J.Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report: a gamma ray burst lasting about 30 s has been detected by IBAS in the IBIS/ISGRI data at 09:58:58 UT of February 23, 2016.
The refined coordinates (J2000) are:
```
R.A.=   94.9937 deg
DEC.=   +33.4075 deg
```
with an uncertainty of 2.2 arcmin (90% c.l.).
The burst had a peak flux of 1.2 counts/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 1.6e-6 erg/cmsq.
A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html
GCN Circular #19060
P. A. Evans (U. Leicester) reports on behalf of the Swift team:
Swift has initiated a ToO observation of the INTEGRAL GRB 160223B. Automated analysis of the XRT data will be presented online at http://www.swift.ac.uk/ToO_GRBs/00020601
Any uncatalogued X-ray sources detected in this analysis will be reported on this website and via GCN COUNTERPART notices. These are not necessarily related to the INTEGRAL event. Any X-ray source considered to be a probable afterglow candidate will be reported via a GCN Circular after manual consideration.
Details of the XRT automated analysis methods are detailed in Evans et al. (2007, A&A, 469, 379; 2009, MNRAS, 397, 1177 and 2014, ApJS, 210, 8).
This circular is an official product of the Swift-XRT team.
GCN Circular #19061
A. von Kienlin, H.-F. Yu, and K. Toelge (all MPE) report on behalf of the Fermi GBM Team:
"At 09:59:01.51 UT on 23 February 2016, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 160223B (trigger 477914345 / 160223416), which was also detected by INTEGRAL (G=F6tz et al. 2016, GCN 19059) The GBM on-ground location is consistent with the INTEGRAL position.
The angle from the Fermi LAT boresight at the GBM trigger time is 49 degrees.
The GBM light curve shows a structured pulse with a duration (T90) of about 17 s (50-300 keV). The time-averaged spectrum from T0-2.560 s to T0+16.896 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.90 (+0.08/-0.07) and the cutoff energy, parameterized as Epeak, is 560 (+110 /-80) keV
The event fluence (10-1000 keV) in this time interval is (5.9 +/- 0.3)E-06 erg/cm^2. The 1.024-sec peak photon flux measured starting from T0+0.256 s in the 10-1000 keV band is 3.1 +/- 0.2 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #19062
S. Dichiara, C. Guidorzi (U. Ferrara), S. Kobayashi (LJMU), A. Gomboc (U. Nova Gorica), C.G. Mundell (U. Bath), on behalf of a larger collaboration report:
The 2-m LCOGT Faulkes Telescope North began observing INTEGRAL and Fermi GRB 160223B (Gotz et al. GCN 19059, von Kienlin et al., GCN 19061) on Feb 23 at 10:06:58 UT (7.8 minutes after the burst trigger) with r filter. We do not detect any optical afterglow candidate within the INTEGRAL error circle (Gotz et al. GCN 19059) down to the following magnitudes:
```
Mid Time      Exposure       Filter       Magnitude
(min)           (s)
-------------------------------------------------------
12.27          5x120            r'          > 20.5
-------------------------------------------------------
```
Values have been calibrated against nearby USNOB-1 stars (R2)
GCN Circular #19063
T.G.R. Roegiers (PSU), L.M. McCauley (PSU), J.A. Kennea (PSU), S.L. Gibson (U. Leicester), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team:
Swift-XRT has performed follow-up observations of the INTEGRAL-detected burst GRB 160223B (Gotz et al. GCN Circ. 19059), collecting 2.3 ks of Photon Counting (PC) mode data between T0+10.6 ks and T0+16.4 ks.
No X-ray sources have been detected inside or close to the INTEGRAL error region. The 3-sigma upper limit in the field ranges from ~0.004 to ~0.005 ct s^-1, corresponding to a 0.3-10 keV observed flux of 1.8e-13 to 1.9e-13 erg cm^-2 s^-1 (assuming a typical GRB spectrum).
The results of the XRT-team automatic analysis of the XRT observations, including a position-specific upper limit calculator, are available at http://www.swift.ac.uk/ToO_GRBs/00020601.
This circular is an official product of the Swift-XRT team.
GCN Circular #19065
E. Mazaeva (IKI), S. Schmalz (ISON), A. Volnova (IKI), N. Tungalag (Research Center of Astronomy and Geophysics MAS), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of INTEGRAL and Fermi GRB 160223B GRB 160223B (Gotz et al. GCN 19059; von Kienlin et al., GCN 19061) with ORI-40 telescope of Khureltogot observatory starting on Feb., 23 (UT) 12:34:31. Within 2.2 arcmin error circle of the GRB 160223B localization (Gotz et al., GCN 19059) we marginally detect two possible sources not presented in USNO-B1.0 catalog. Coordinates of the sources are
```
Source (1): (J2000) 6:20:05.53 +33:24:58.7
Source (2): (J2000) 6:20:03.89 +33:23:14.2
```
with uncertainties of 1 arcsec in both coordinates. At this time we cannot confirm the sources are real or variable due to low S/N and absence of a full dataset.
Preliminary photometry of the sources is following
```
Date UT start       t-T0   Filter Exp.   OT   Err   UL(3sigma) Source#
                     (mid, days)   (s)

2016-02-23 12:34:31  0.14969 none  7200   18.7 0.35  18.9  (1)
2016-02-23 12:34:31  0.14969 none  7200   18.7 0.30  18.9  (2)
```
Photometry is based on nearby USNO-B1.0 stars, R2 magnitudes:
```
USNO-B1_id        R2
1234-0146334    14.41
1234-0146221    14.55
1233-0156534    14.77
1234-0146470    13.48
1234-0146172    13.37
```
GCN Circular #19069
A.Gabovich, V.Yurkov, Yu.Sergienko, D.Varda Blagoveschensk Educational State University, Blagoveschensk
N.Tyurina, V. Lipunov, E. Gorbovskoy, V.Kornilov, P.Balanutsa, A.Kuznetsov, D.Kuvshinov Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University
D.Buckley, S. Potter, M.Kotze South African Astronomical Observatory
K.Ivanov, N.M.Budnev, O.Gres, V.A.Poleshchuk Irkutsk State University
A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory
R. Rebolo, M. Serra-Ricart, N. Lodieu, G. Israelian The Instituto de Astrofisica de Canarias
MASTER-Amur robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Blagoveschensk was pointed to the GRB160223B 32 sec after trigger time at 2016-02-23 09:59:30 UT. On our first set (10 sec, unfiltered) we not found optical transients within INTEGRAL error-box (ra=06 19 54 dec=+33 24 21 r=2'.2 ) brighter then 15.8.
The message may be cited.
GCN Circular #19085
S. Ozawa (Wasoeda U), A. Yoshida, T. Sakamoto, I. Takahashi, Y. Kawakubo, K. Senuma, M. Moriyama, Y. Yamada (AGU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA), Y. Asaoka, S. Torii (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U), W. Ishizaki (ICRR), M. L. Cherry (LSU), S. Ricciarini (U of Florence) P. S. Marrocchesi (U of Siena) and the CALET collaboration:
The long-duration GRB160223B (Gotz et al., GCN Circ. 19059; von Kienlin et al., GCN Circ. 19061) triggered the CALET Gamma-Ray Burst Monitor (CGBM) at 09:58:59.5 on 23 February 2016. The burst signal was detected by SGM instrument.
The light curve of the SGM shows at least three peaks. The emission starts at T0, peaks at T0+1 sec and ends at T0+25 sec. The T90 duration measured by the SGM data is 11 +- 1 sec (40-1000 keV).
The CGBM data used in this analysis are provided by the Waseda CALET Operation Center located at the Waseda University.

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Jochen Greiner, last update: 26-Feb-2016 [Disclaimer]