Gamma-ray Burst 241101A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 01 Nov 24 05:42:08 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1264304,   Seg_Num: 0
GRB_RA:          204.333d {+13h 37m 20s} (J2000),
                 204.620d {+13h 38m 29s} (current),
                 203.754d {+13h 35m 01s} (1950)
GRB_DEC:         +28.264d {+28d 15' 49"} (J2000),
                 +28.138d {+28d 08' 16"} (current),
                 +28.518d {+28d 31' 04"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3918 [cnts]    Image_Peak=278 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   137     E_range: 15-50 keV
BKG_INTEN:       21110 [cnts]
BKG_TIME:        20493.54 SOD {05:41:33.54} UT
BKG_DUR:         8 [sec]
GRB_DATE:        20615 TJD;   306 DOY;   24/11/01
GRB_TIME:        20505.76 SOD {05:41:45.76} UT
GRB_PHI:         -145.83 [deg]
GRB_THETA:        12.57 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     22.00 [sigma]
IMAGE_SIGNIF:    11.27 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +1  +1 -100  +0 -71  +0 
SUN_POSTN:       216.90d {+14h 27m 36s}  -14.59d {-14d 35' 20"}
SUN_DIST:         44.35 [deg]   Sun_angle= 0.8 [hr] (West of Sun)
MOON_POSTN:      213.00d {+14h 12m 01s}  -15.96d {-15d 57' 21"}
MOON_DIST:        44.84 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:       41.96, 79.78 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      190.21, 35.37 [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 = 69.82,-20.08 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 01 Nov 24 05:45:47 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1264304,   Seg_Num: 0
GRB_RA:          204.333d {+13h 37m 20s} (J2000),
                 204.620d {+13h 38m 29s} (current),
                 203.754d {+13h 35m 01s} (1950)
GRB_DEC:         +28.264d {+28d 15' 49"} (J2000),
                 +28.138d {+28d 08' 16"} (current),
                 +28.518d {+28d 31' 04"} (1950)
GRB_DATE:        20615 TJD;   306 DOY;   24/11/01
GRB_TIME:        20505.76 SOD {05:41:45.76} UT
TRIGGER_INDEX:   137
GRB_PHI:         -145.83 [deg]
GRB_THETA:        12.57 [deg]
DELTA_TIME:      57.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     22.00 [sigma]
IMAGE_SIGNIF:    11.27 [sigma]
LC_URL:          sw01264304000msb.lc
SUN_POSTN:       216.90d {+14h 27m 37s}  -14.59d {-14d 35' 23"}
SUN_DIST:         44.35 [deg]   Sun_angle= 0.8 [hr] (West of Sun)
MOON_POSTN:      213.03d {+14h 12m 08s}  -15.97d {-15d 58' 06"}
MOON_DIST:        44.85 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:       41.96, 79.78 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      190.21, 35.37 [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 = 69.82,-20.08 [deg].

GCN Circular #38025
T. M. Parsotan (GSFC), S. Dichiara (PSU), R. Gupta (NASA GSFC), T. Sakamoto (AGU) and T. Sbarrato (INAF-OAB) report on behalf of the Neil Gehrels Swift Observatory Team:
At 05:41:45 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 241101A (trigger=1264304). The BAT on-board calculated location is RA, Dec 204.333, +28.264 which is
```
  RA(J2000)  = 13h 37m 20s
  Dec(J2000) = +28d 15' 49"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a double-peaked structure with a duration of about 15 sec. The peak count rate was ~2300 counts/sec (15-350 keV), at ~1 sec after the trigger.
Due to a Sun observing constraint, Swift cannot slew to the BAT position until 17:57 UT on 2024 November 05. There will thus be no XRT or UVOT data for this trigger before this time.
Burst Advocate for this burst is T. M. Parsotan (tyler.parsotan AT nasa.gov). 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/)
GCN Circular #38033
A. Y. Lien (U Tampa), S. D. Barthelmy (GSFC), R. Gupta (GSFC), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), M. J. Moss (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC), D. Sadaula (GSFC/UMBC), T. Sakamoto (AGU) (i.e. the Swift-BAT team):
Using the data set from T-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 241101A (trigger #1264304) (Parsotan, et al., GCN Circ. 38025). The BAT ground-calculated position is RA, Dec = 204.323, 28.233 deg which is
```
   RA(J2000)  =  13h 37m 17.5s
   Dec(J2000) = +28d 13' 57.6"
```
with an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%.
The mask-weighted light curve shows a single-pulse structure that starts at T-2 sec, peaks at T+1 sec, and ends at T+9 sec. T90 (15-350 keV) is 10.3 +- 4.5 sec (estimated error including systematics).
The time-averaged spectrum from T-2.76 to T+12.86 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.79 +- 0.13. The fluence in the 15-150 keV band is 5.1 +- 0.4 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T-0.29 sec in the 15-150 keV band is 1.4 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at https://swift.gsfc.nasa.gov/results/batgrbcat/BAT_refined_circular/1264304
GCN Circular #38037
Martin Jelinek and Jan Strobl (ASU CAS Ondrejov, CZ), Sergey Karpov, Martin Masek, Petr Janecek, Jakub Jurysek, Jan Ebr, Ronan Cunniffe, Petr Travnicek and Michael Prouza (Institute of Physics, Prague, CZ)
report:
The 25cm robotic telescope FRAM-ORM at La Palma (Spain) reacted robotically to the Swift/BAT alert of GRB241101A (Parsotan et al., GCNC 38025, Lien et al., GCNC 38033), obtaining a series of unfiltered images starting at 05:42:20.6 UT, i.e. 35s post trigger.
The observation sequence consisted of 40x20s exposures followed by 30x60s exposures, covering a field of view of 30 arcmin centered on the BAT position. We do not detect any new or strongly variable source in single or combined images. A deep combined image of all data taken during the first hour of follow-up (characteristic time T0+1.4ks), calibrated against Gaia DR3, reaches a 3-sigma limiting magnitude of G > 20.2 (AB).
GCN Circular #38038
V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (Lomonosov Moscow State University, SAI, Physics Department),
R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA),
R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias),
D. Buckley (South African Astronomical Observatory),
O.A. Gress, N.M. Budnev, O.Ershova (Irkutsk State University, API),
L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory),
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
V. Yurkov, A. Gabovich (Blagoveschensk Educational State University)
MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the Swift GRB 241101A ( T. M. Parsotan et al., GCN 38025) errorbox 66958 sec after notice time and 66984 sec after trigger time at 2024-11-02 00:18:10 UT, with upper limit up to 18.0 mag. The observations began at zenith distance = 87 deg. The sun altitude is -38.2 deg.
The galactic latitude b = 79 deg., longitude l = 40 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2655501
We obtain a following upper limits.
```
Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

   67075 |   MASTER-Kislovodsk |   C |   180 | 16.2 |        
   68322 |   MASTER-Kislovodsk |   C |   180 | 17.1 |        
   69560 |   MASTER-Kislovodsk |   C |   180 | 17.1 |        
   70917 |   MASTER-Kislovodsk |   C |   180 | 17.8 |        
   72195 |   MASTER-Kislovodsk |   C |   180 | 18.0 |        
   73394 |   MASTER-Kislovodsk |   C |   180 | 17.9 |        
   74716 |   MASTER-Kislovodsk |   C |   180 | 17.8 |        
```
Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.

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Jochen Greiner, last update: 02-Nov-2024 [Disclaimer]