[vsnet-grb-info 24742] GRB 191031D: XMM-Newton upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  26841
SUBJECT: GRB 191031D: XMM-Newton upper limit
DATE:    20/01/21 16:38:21 GMT
FROM:    Paolo D'Avanzo at INAF-OAB  <pda.davanzo at gmail.com>

P. D'Avanzo, S. Campana, M. G. Bernardini (INAF-OAB), M. Branchesi (GSSI), E. Chassande-Mottin (APC, CNRS/IN2P3), 
S. Covino (INAF-OAB), V. D'Elia (ASI-SSDC), G. Ghirlanda, G. Ghisellini, A. Melandri, L. Nava, O. S. Salafia (INAF-OAB), 
R. Salvaterra (INAF-IASFMi), G. Tagliaferri (INAF-OAB), S. D. Vergani (GEPI/Obs. Paris) report:

XMM-Newton started observing the field of the short GRB 191031D (Fermi-GBM et al., GCN Circ. 26111; D'Elia et al., GCN Circ. 26112; 
Mailyan et al., GCN Circ. 26118; Ursi et al., GCN Circ. 26123; Frederiks et al., GCN Circ. 26126; Gaikwad et al., GCN Circ. 26129; 
Frederiks et al., GCN Circ. 26149; Shimizu et al., GCN Circular. 26240) on 14 November 2019 at 09:58:00 UT, ~ 13.5 d after the burst. 
The last ~18 ks of the observation were affected by an enhanced background and were filtered out. The resulting EPIC/pn exposure 
time is 27.2 ks. 

No X-ray source is detected within the enhanced XRT position (Osborne et al., GCN Circ. 26117) down to a 3sigma limit of ~ 1.6e-3 cts/s 
in the 0.3-10 keV energy range. Assuming the spectral parameters derived by Swift/XRT, the above value translates into an unabsorbed 
flux limit of ~ 4.8e-15 erg/cm^2/s in the 0.3-10 keV energy range. 


We acknowledge the XMM-Newton staff for their support in scheduling and executing these observations.