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GRB 240112D

GCN Circular 35527

Subject

GRB 240112D: Fermi GBM Final Real-time Localization

Date

2024-01-12T22:06:48Z (a year ago)

From

Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>

Via

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

At 21:56:04 UT on 12 Jan 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240112D (trigger 726789369.452754 / 240112914).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 148.5, Dec = -79.4 (J2000 degrees, equivalent to J2000 09h 54m, -79d 24'), with a statistical uncertainty of 11.1 degrees.

The angle from the Fermi LAT boresight is 26.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240112914/quicklook/glg_skymap_all_bn240112914.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/bn240112914/quicklook/glg_healpix_all_bn240112914.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240112914/quicklook/glg_lc_medres34_bn240112914.gif

GCN Circular 35528

Subject

Fermi GRB 240112D: Global MASTER-Net observations report

Date

2024-01-12T22:31:00Z (a year ago)

From

Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>

Via

legacy email

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-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 240112D ( Fermi GBM team, GCN 35527Loading...
 
 ) errorbox  42 sec after notice time and 78 sec after trigger time at 2024-01-12 21:57:23 UT, with upper limit up to  19.8 mag. The observations began at zenith distance = 52 deg. The sun  altitude  is -35.0 deg. 

The galactic latitude b = -20 deg., longitude l = 295 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2354610

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

      89 | 2024-01-12 21:57:23 |         MASTER-SAAO | (10h 37m 28.51s , -77d 28m 52.6s) |   C |    20 | 18.4 |        
     114 | 2024-01-12 21:57:23 |         MASTER-SAAO | (10h 37m 28.45s , -77d 28m 52.6s) |   C |    70 | 19.1 |  Coadd 
      89 | 2024-01-12 21:57:23 |         MASTER-SAAO | (10h 49m 36.14s , -77d 40m 50.9s) |   C |    20 | 18.6 |        
     114 | 2024-01-12 21:57:23 |         MASTER-SAAO | (10h 49m 36.14s , -77d 40m 50.8s) |   C |    70 | 19.5 |  Coadd 
     128 | 2024-01-12 21:58:02 |         MASTER-SAAO | (10h 37m 28.13s , -77d 28m 52.8s) |   C |    20 | 18.4 |        
     128 | 2024-01-12 21:58:02 |         MASTER-SAAO | (10h 49m 35.78s , -77d 40m 50.9s) |   C |    20 | 18.6 |        
     172 | 2024-01-12 21:58:41 |         MASTER-SAAO | (10h 37m 27.74s , -77d 28m 52.7s) |   C |    30 | 18.8 |        
     172 | 2024-01-12 21:58:41 |         MASTER-SAAO | (10h 49m 35.40s , -77d 40m 51.0s) |   C |    30 | 18.9 |        
     227 | 2024-01-12 21:59:31 |         MASTER-SAAO | (10h 37m 27.15s , -77d 28m 53.1s) |   C |    40 | 18.9 |        
     282 | 2024-01-12 21:59:31 |         MASTER-SAAO | (10h 37m 27.16s , -77d 28m 53.1s) |   C |   150 | 19.7 |  Coadd 
     227 | 2024-01-12 21:59:31 |         MASTER-SAAO | (10h 49m 34.89s , -77d 40m 51.0s) |   C |    40 | 19.2 |        
     282 | 2024-01-12 21:59:31 |         MASTER-SAAO | (10h 49m 34.90s , -77d 40m 51.1s) |   C |   150 | 19.8 |  Coadd 
     303 | 2024-01-12 22:00:42 |         MASTER-SAAO | (10h 37m 26.55s , -77d 28m 53.5s) |   C |    50 | 18.9 |        
     303 | 2024-01-12 22:00:42 |         MASTER-SAAO | (10h 49m 34.21s , -77d 40m 51.2s) |   C |    50 | 19.0 |        
     377 | 2024-01-12 22:01:51 |         MASTER-SAAO | (10h 37m 26.05s , -77d 28m 53.8s) |   C |    60 | 19.2 |        
     377 | 2024-01-12 22:01:51 |         MASTER-SAAO | (10h 49m 33.67s , -77d 40m 51.6s) |   C |    60 | 19.4 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.

GCN Circular 35547

Subject

GRB 240112D: Glowbug gamma-ray detection

Date

2024-01-16T17:32:58Z (a year ago)

From

C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>

Via

Web form

C.C. Cheung, M. Kerr, J. E. Grove, R. Woolf (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge (MSFC), and M.S. Briggs (UAH) report:                                                                                                                                                                                                                                                   
 
The Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of GRB 240112D, which was also detected by Fermi/GBM (GCN #35527Loading...
 
 ) and INTEGRAL/SPI-ACS (Trigger no. 10468).
 
Using an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2024-01-12 21:56:04.064 with a duration of 2.56 s and a total significance of about 13.0 sigma.  The light curve comprises a single peak.
 
Using a standard power-law function with an exponential high-energy cutoff [3] to model the emission over this duration results in a photon index dN/dE~E^x of x=1.5 and a cutoff energy ("Epeak") of 455 keV.  The modeled 10-10000 keV fluence is 1.3e-06 erg/cm^2.
 
The analysis results presented here are preliminary and use a response function that lacks a detailed characterization of the surrounding passive structure of the ISS.
 
Glowbug is a NASA-funded technology demonstrator for sensitive, low-cost gamma-ray transient telescopes developed, built, and operated by the U.S. Naval Research Laboratory (NRL) with support from the University of Alabama in Huntsville, USRA, and NASA MSFC.  It was launched on 2023 March 15 aboard the Department of Defense Space Test Program’s STP-H9 to the ISS.  The detector comprises 12 large-area (15 cm x 15 cm) CsI:Tl panels covering the surface of a half cube, and two hexagonal (5-cm diameter, 10-cm length) CLLB scintillators, giving it a large field of view (instantaneous FoV ~2/3 sky) over a wide energy band of 50 keV to >2 MeV.
 
[1] Grove, J.E. et al. 2020, Proc. Yamada Conf. LXXI, arXiv:2009.11959Loading...
 
 
[2] Woolf, R.S. et al. 2022, Proc. SPIE, 12181, id. 121811O
[3] Goldstein, A. et al. 2020, ApJ 895, 40, arXiv :1909.03006
 
Distribution Statement A: Approved for public release.  Distribution is unlimited.