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GCN Circular 37282

Subject
SGR 1E 1841-045 / Kes 73 (Trigger 1249653) - Osservatorio Astronomico Nastro Verde upper limit
Date
2024-08-25T20:16:24Z (a month ago)
Edited On
2024-08-25T20:37:25Z (a month ago)
From
Nello Ruocco at Osservatorio Nastro Verde - Sorrento (Naples) - Italy - MPC Code C82 <osservatorionastroverde@gmail.com>
Edited By
Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Nello Ruocco at Osservatorio Nastro Verde - Sorrento (Naples) - Italy - MPC Code C82 <osservatorionastroverde@gmail.com>
Via
Web form
Nello Ruocco at Osservatorio Nastro Verde - Sorrento (Naples) - Italy
in a large collaboration with:
M.G. Dainotti (National Astronomical Observatory of Japan), 
Y. Niino (Tokyo University, Institute of Astronomy), 
K. Kalinowski (Aarhus University, Department of Physics and Astronomy),
B. De Simone (Universita' degli Studi Di Salerno)
report: 

We imaged the field of  SGR 1E 1841-045 / Kes 73 (trigger=1249653) (J. J. DeLaunay (PSU), S. Dichiara (PSU), A. Y. Lien (U Tampa) and
T. M. Parsotan (GSFC) GCN 37211) with telescope of Nastro Verde Observatory - Sorrento (Naples), Italy. 
Member of: 
AAVSO - American Association of Variable Star Observers.
UAI - Unione Astrofili Italiani/GRB Section


The observations started at 20:57 UT of 2024/08/20, after about 2 hours after the transient, with clear sky, with principal telescope  SC 0.35 f/10 with focal reduced + CCD Sbig ST10 XME
I took 23 image of 60 sec each. All images are unfiltered, calibrated with masterdark and masterflat,stacked with Tycho Tracker software
We have not detected any clearly visible sources, up to 19.5th magnitude with clear skies.
 Start                       End        Rlim
20:57:34 UT               21:26:02 UT   19.5

We did not found any optical counterpart.




Magnitudes were estimated with the Gaia DR2 cat. and 
are not corrected for galactic dust extinction.



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