GCN Circular 33641
Subject
GRB 230414B: Osservatorio Astronomico Nastro Verde - Sorrento: optical observations
Date
2023-04-18T16:26:54Z (2 years ago)
From
Nello Ruocco at Osservatorio Nastro Verde - Sorrento (Naples) - Italy - MPC Code C82 <osservatorionastroverde@gmail.com>
I imaged the field of GRB 230414B detected by SWIFT(trigger 1164180)
with telescope of Nastro Verde Observatory - Sorrento (Naples), Italy. Member of:
AAVSO - American Association of Variable Star Observers.
UAI/SSV - Unione Astrofili Italiani/sezione stelle variabili.
AstroCampania Associazione
The observations started at 20:28 UT of 2023/04/14
with principal telescope SC 0.35 f/10 with focal reduced + CCD Sbig ST10 XME
I took 12 image of 180 sec each. All images are unfiltered stacked with Tycho Tracker software
.
Start T0+ End T0+
20:28:53 UT 21;26:21 UT
I detected a (fading) afterglow in the error box of the XRTcandidate.
A. D'Ai (INAF-IASFPA), E. Ambrosi (INAF-IASFPA), et al.
at the following position (+/- 2 arcsec):
RA (J2000.0) = 12h 04m 22.73s
DEC(J2000.0) = +53° 09' 15.3"
The results of our photometry are:
-----------------------------------------
Date UT CR-mag
Middle +/- 0.05
-----------------------------------------
2460049.354 19.760887
2460049.359 19.691675
2460049.361 19.481389
2460049.363 19.618392
2460049.365 19.760087
2460049.367 19.909645
2460049.37 19.739394
2460049.374 19.071181
2460049.388 19.378857
2460049.394 21.82892
-----------------------------------------
Magnitudes were estimated with the Gaia DR2 cat. and
are not corrected for galactic dust extinction.
The message may be cited.