Gamma-ray Burst 241013A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 13 Oct 24 00:59:03 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      46
TRIGGER_NUM:     750473919
GRB_RA:          272.133d {+18h 08m 32s} (J2000),
                 272.535d {+18h 10m 08s} (current),
                 271.323d {+18h 05m 18s} (1950)
GRB_DEC:         -31.350d {-31d 21' 00"} (J2000),
                 -31.344d {-31d 20' 39"} (current),
                 -31.358d {-31d 21' 29"} (1950)
GRB_ERROR:       23.03 [deg radius, statistical plus systematic]
GRB_INTEN:       46 [cnts/sec]
DATA_SIGNIF:     5.10 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        20596 TJD;   287 DOY;   24/10/13
GRB_TIME:        3514.36 SOD {00:58:34.36} UT
GRB_PHI:          65.00 [deg]
GRB_THETA:        45.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.34
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      93%  GRB
2nd_MOST_LIKELY:   2%  Generic Transient
DETECTORS:       0,1,1, 0,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:       198.64d {+13h 14m 35s}   -7.89d {-07d 53' 20"}
SUN_DIST:         72.17 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      322.42d {+21h 29m 41s}  -18.83d {-18d 50' 00"}
MOON_DIST:        46.47 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:        0.39, -5.50 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      271.84, -7.92 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241013041/quicklook/glg_lc_medres34_bn241013041.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 246.63,7.22 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(1.0<100sec) coincident with the INTEGRAL event (trignum=10938).

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Sun 13 Oct 24 00:58:45 UT
NOTICE_TYPE:    INTEGRAL Wakeup
TRIGGER_NUM:    10938,   Sub_Num: 0
GRB_RA:         275.2737d {+18h 21m 06s} (J2000),
                275.6296d {+18h 22m 31s} (current),
                274.5555d {+18h 18m 13s} (1950)
GRB_DEC:        -15.6312d {-15d 37' 51"} (J2000),
                -15.6181d {-15d 37' 04"} (current),
                -15.6551d {-15d 39' 17"} (1950)
GRB_ERROR:      3.00 [arcmin, radius, statistical only]
GRB_INTEN:      10.34 [sigma]
GRB_TIME:       3513.67 SOD {00:58:33.67} UT
GRB_DATE:       20596 TJD;   287 DOY;   24/10/13
SC_RA:          281.17 [deg] (J2000)
SC_DEC:         -17.55 [deg] (J2000)
SUN_POSTN:      198.64d {+13h 14m 35s}   -7.89d {-07d 53' 20"}
SUN_DIST:        75.42 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:     322.42d {+21h 29m 40s}  -18.83d {-18d 50' 04"}
MOON_DIST:       44.68 [deg]
GAL_COORDS:      15.61, -0.56 [deg] galactic lon,lat of the burst
ECL_COORDS:     275.12,  7.71 [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(1.0<100sec) coincident with the FERMI_GBM event (trignum=750473919).

 GCN NOTICE 

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 13 Oct 24 00:59:21 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      58
TRIGGER_NUM:     750473919
GRB_RA:          268.610d {+17h 54m 26s} (J2000),
                 269.011d {+17h 56m 03s} (current),
                 267.801d {+17h 51m 12s} (1950)
GRB_DEC:         -31.240d {-31d 14' 23"} (J2000),
                 -31.243d {-31d 14' 33"} (current),
                 -31.231d {-31d 13' 52"} (1950)
GRB_ERROR:       13.02 [deg radius, statistical only]
DATA_SIGNIF:     6.20 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        20596 TJD;   287 DOY;   24/10/13
GRB_TIME:        3514.36 SOD {00:58:34.36} UT
GRB_PHI:          61.00 [deg]
GRB_THETA:        46.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4173 (Gnd S/W Version number)
SUN_POSTN:       198.64d {+13h 14m 35s}   -7.89d {-07d 53' 21"}
SUN_DIST:         69.16 [deg]   Sun_angle= -4.7 [hr] (East of Sun)
MOON_POSTN:      322.42d {+21h 29m 41s}  -18.83d {-18d 49' 56"}
MOON_DIST:        49.48 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      359.00, -2.82 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      268.80, -7.81 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241013041/quicklook/glg_lc_medres34_bn241013041.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_750473919.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 INTEGRAL event (trignum=10938).  


 GCN NOTICE 

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 13 Oct 24 01:00:30 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      0
TRIGGER_NUM:     750473919
GRB_RA:          268.410d {+17h 53m 38s} (J2000),
                 268.774d {+17h 55m 06s} (current),
                 267.675d {+17h 50m 42s} (1950)
GRB_DEC:         -18.720d {-18d 43' 11"} (J2000),
                 -18.723d {-18d 43' 23"} (current),
                 -18.710d {-18d 42' 37"} (1950)
GRB_ERROR:       11.51 [deg radius, statistical only]
DATA_SIGNIF:     7.70 [sigma]
DATA_INTERVAL:   9.216 [sec]
GRB_DATE:        20596 TJD;   287 DOY;   24/10/13
GRB_TIME:        3514.36 SOD {00:58:34.36} UT
GRB_PHI:          52.00 [deg]
GRB_THETA:        35.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       198.65d {+13h 14m 35s}   -7.89d {-07d 53' 22"}
SUN_DIST:         68.72 [deg]   Sun_angle= -4.7 [hr] (East of Sun)
MOON_POSTN:      322.43d {+21h 29m 44s}  -18.83d {-18d 49' 40"}
MOON_DIST:        50.60 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:        9.72,  3.67 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      268.49,  4.71 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241013041/quicklook/glg_lc_medres34_bn241013041.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_750473919.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 INTEGRAL event (trignum=10938).  


 GCN NOTICE 

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 13 Oct 24 01:08:02 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     750473919
GRB_RA:          252.890d {+16h 51m 34s} (J2000),
                 253.294d {+16h 53m 11s} (current),
                 252.075d {+16h 48m 18s} (1950)
GRB_DEC:         -33.290d {-33d 17' 23"} (J2000),
                 -33.330d {-33d 19' 47"} (current),
                 -33.206d {-33d 12' 21"} (1950)
GRB_ERROR:       14.50 [deg radius, statistical only]
GRB_DATE:        20596 TJD;   287 DOY;   24/10/13
GRB_TIME:        3514.36 SOD {00:58:34.36} UT
GRB_PHI:          48.00 [deg]
GRB_THETA:        55.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       198.65d {+13h 14m 36s}   -7.89d {-07d 53' 29"}
SUN_DIST:         56.33 [deg]   Sun_angle= -3.6 [hr] (East of Sun)
MOON_POSTN:      322.51d {+21h 30m 01s}  -18.80d {-18d 48' 00"}
MOON_DIST:        62.76 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      349.78,  6.97 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      255.51,-10.71 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241013041/quicklook/glg_lc_medres34_bn241013041.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241013041/quicklook/glg_locplot_all_bn241013041.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 INTEGRAL event (trignum=10938).  


 GCN Circular #37780 


The Fermi GBM team reports the detection of a likely LONG GRB


At 00:58:34 UT on 13 Oct 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241013A (trigger 750473919.357776 / 241013041).


The on-ground calculated location, using the Fermi GBM trigger data, is RA = 252.9, Dec = -33.3 (J2000 degrees, equivalent to J2000 16h 51m, -33d 17'), with a statistical uncertainty of 14.5 degrees.


The angle from the Fermi LAT boresight is 55.0 degrees.


The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241013041/quicklook/glg_skymap_all_bn241013041.png


The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241013041/quicklook/glg_healpix_all_bn241013041.fit


The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241013041/quicklook/glg_lc_medres34_bn241013041.gif
 




 GCN NOTICE 

    
TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Sun 13 Oct 24 06:48:40 UT
NOTICE_TYPE:    INTEGRAL Offline
TRIGGER_NUM:    10938,   Sub_Num: 1
GRB_RA:         275.2758d {+18h 21m 06s} (J2000),
                275.6317d {+18h 22m 32s} (current),
                274.5576d {+18h 18m 14s} (1950)
GRB_DEC:        -15.6300d {-15d 37' 47"} (J2000),
                -15.6169d {-15d 37' 00"} (current),
                -15.6539d {-15d 39' 13"} (1950)
GRB_ERROR:      2.50 [arcmin, radius, statistical only]
GRB_INTEN:      10.34 [sigma]
GRB_TIME:       3513.67 SOD {00:58:33.67} UT
GRB_DATE:       20596 TJD;   287 DOY;   24/10/13
SC_RA:          281.17 [deg] (J2000)
SC_DEC:         -17.55 [deg] (J2000)
SUN_POSTN:      198.87d {+13h 15m 29s}   -7.98d {-07d 58' 46"}
SUN_DIST:        75.18 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:     325.76d {+21h 43m 03s}  -17.51d {-17d 30' 29"}
MOON_DIST:       47.95 [deg]
GAL_COORDS:      15.61, -0.56 [deg] galactic lon,lat of the burst
ECL_COORDS:     275.13,  7.72 [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(1.0<100sec) coincident with the FERMI_GBM event (trignum=750473919).

  
 GCN Circular #37781 


D.Gotz (CEA, Saclay), S.Mereghetti (INAF, IASF-Milano), C.Ferrigno, E.Bozzo,
V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC, Versoix)
and J.Borkowski (CAMK, Torun) report:


a gamma ray burst lasting about 30 s has been detected by IBAS in the
IBIS/ISGRI data at 00:58:26  UT of 2024 October 13.


The refined coordinates (J2000) are:
R.A.=  275.2756 deg
DEC.=  -15.6302 deg

with an uncertainty of  2.5   arcmin (90% c.l.).


A preliminary analysis gives a peak flux of  about 0.6  ph/cm2/s (20-200 keV, 2-s integration time) and a fluence in the same energy range of about 6e-7 erg/cmsq.


This burst has also been detected by Fermi/GBM (GCN 37780), and its position 
is at 26.8 =C2=B0 from the Fermi reported position.


A plot of the light curve will  be posted at
http://ibas.iasf-milano.inaf.it/IBAS_Results.html

 GCN Circular #37787 


M. Ferro, S. Campana, Y.-D. Hu, R. Brivio, P. D=E2=80=99Avanzo, S. Covino, =
and D. Fugazza (INAF-OAB) report on behalf of the REM team:
We observed the field of GRB 241013A, detected by Fermi GBM (Fermi GBM Team=
 GCN 37780) and INTEGRAL (Gotz et al. GCN 37781), with the REM 60cm robotic=
 telescope located at the ESO observatory of La Silla (Chile), for two cons=
ecutive nights. The observations were carried in the g, r, i, z, J, H bands=
, starting:
(1) epoch 1 on 2024 October 13 at 01:23 UT (i.e. 24.4 minutes after the INT=
EGRAL trigger), and lasting for about 1 hours.
(2) epoch 2 on 2024 October 14 at 00:57 UT (i.e. 1 day after the INTEGRAL t=
rigger), and lasting for about 1 hours.


We note that the field is extremely crowded due to its localization near th=
e Galactic plane, where the extinction is significantly high, with E(B-V) =
=3D 11.8 (https://irsa.ipac.caltech.edu/workspace/TMP_QnYsQd_14990/DUST/18_=
20_57.1_-15_38_09.5.v0001/extinction.html)


From preliminary photometry within the 90% c.l. INTEGRAL error region (2.5 =
arcmin) we detect a source that is not listed in the 2MASS catalog, in H ba=
nd first epoch, at the following position (J2000):
R.A. = 18:20:57.1
DEC. = -15:38:09.5

with a fiducial uncertainty of 3 arcsec.
With magnitude:
epoch (1) H = 14.9+-0.3 (Vega; against 2MASS)


The source is not detected in the second epoch down to:
epoch (2) H > 15.3 (Vega; against 2MASS)


We note however that two PS1 sources are consistent with the candidate posi=
tion, and a third one is marginally consistent, with r-band magnitudes ~20.=
3, ~21.6, and ~20.4, respectively. From preliminary photometry at the H-ban=
d source position, on the two r-band observations, we find:
epoch (1) r > 19.7 (AB; against PS1)
epoch (2) r =3D 19.8+-0.3 (AB; against PS1)


We suggest that this could be the blending of the PS1 sources, only detecte=
d in the second epoch given our deeper magnitude limit with respect to the =
first night. Further analysis is ongoing.

 GCN Circular #37789 


P. Veres (UAH) and C. Meegan (UAH) report on behalf of
the Fermi Gamma-ray Burst Monitor Team:


"At 00:58:34.36 UT on 13 October 2024, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 241013A (trigger 750473919/241013041).
which was also detected by INTEGRAL (Gotz et al. 2024, GCN 37781).
The Fermi GBM on-ground location is consistent with the INTEGRAL position.


The angle from the Fermi LAT boresight is 29 degrees.


The GBM light curve consists of a single emission episode with a duration (T90)
of about 9 s (50-300 keV). The time-averaged spectrum
from T0-6.1 to T0+3.6 s is best fit by
a simple power law function with index -1.26 +/- 0.06.


The event fluence (10-1000 keV) in this time interval is
(1.4 +/- 0.1)E-06 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+2.1 s in the 10-1000 keV band is 1 +/- 0.1 ph/s/cm^2.


A power law function with an exponential high-energy cutoff fits the spectrum equally well.
The power law index is -0.58 +/- 0.29 and the cutoff energy, parameterized as
Epeak, is 550 +/- 200 keV.


The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog:
https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html


For Fermi GBM data and info, please visit the official Fermi GBM Support Page:
https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"

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Jochen Greiner, last update: 15-Oct-2024 [Disclaimer]