GCN Circular 36351
Subject
Additional DECam GW-MMADS Candidates from three nights of observations
Date
2024-04-30T03:04:39Z (17 days ago)
From
Igor Andreoni at JSI/UMD/NASA <igor.andreoni@gmail.com>
Via
Web form
Lei Hu (CMU), Tomás Cabrera (CMU), Antonella Palmese (CMU), Igor Andreoni (UMD), Brendan O'Connor (CMU), Keerthi Kunnumkai (CMU) report on behalf of the GW-MMADS team:
We report additional candidates from the DECam GW-MMADS survey program (GCN 36245, GCN 36273, GCN 36298, GCN 36317) follow-up of the LIGO/Virgo/KAGRA event S240422ed (GCN 36236, GCN 36240).
We ran the SFFT difference imaging (Hu et al. 2022) on the available images from the first three nights of observations (between 2023-04-22 23:37 and 2024-04-25 02:50 UTC), filtered out likely stars and moving objects, and visually inspected the remaining transients.
We reported on TNS new transients within the LVK 95% CI area, and report here the additional candidate counterparts with at least two detections and possibly associated with a galaxy.
+-------------------------+------------+------------+-----------+-----------+
| id | tns | ra | dec | comment |
|-------------------------+------------+------------+-----------+-----------|
| T202404240826256m240205 | AT 2024hiw | 126.60656 | -24.03458 | [1] |
| T202404240824462m330712 | AT 2024hiu | 126.19269 | -33.12002 | [2] |
+-------------------------+------------+------------+-----------+-----------+
[1] ~2.3 arcsec from a galaxy
[2] ~3.8 arcsec from a galaxy (possibly from a star on top of a galaxy based on Gaia DR3 and visual inspection)
We thank the CTIO and NOIRLab staff for supporting these observations and the data calibrations.