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Medicina ToO of the non-identified gamma-ray source AGL J1412-0522

ATel #10718; Elise Egron, Maura Pilia (INAF-OAC), Simona Righini (INAF-IRA), Alberto Pellizzoni, Sara Loru (INAF-OAC), Marcello Giroletti (INAF-IRA)
on 6 Sep 2017; 20:17 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Elise Egron (egron@oa-cagliari.inaf.it)

Subjects: Radio, Gamma Ray, Transient

Following the AGILE detection of a non-identified gamma-ray source AGL J1412-0522 on 5-7 August 2017 (ATel #10623), we performed radio observations with the 32-m Medicina radio telescope at 8.5 GHz (with 680 MHz bandwidth) on 9 August 2017 from 12:40 to 19:00 UTC and on 10 August 2017 from 14:00 to 17:50 UTC. We carried out squared on-the-fly maps of 45.5'x45.5' centered on the gamma-ray position (ra=14:12:06.0, dec=-05:22:14.9) to take into account the 0.4 deg position error from AGILE results. Bad and unstable weather conditions constrained us to reject more than 30% of the data and might have partially affected also the remaining acquisitions. We therefore carried out an additional observation on 1 September 2017 from 11:20 to 17:30 UTC with much improved weather conditions. The map obtained during the last session is similar to the previous ones, showing some radio excesses with flux intensities peaking between 50 and 85 mJy, whereas the rms is about 10 mJy. Although we cannot exclude the presence of remaining artifacts, the gamma-ray source might correspond to one of these possible radio emissions located at the following positions assuming a 4.5' beam size :
ra= 14:13:21.3, dec= -4:57:53.0;
ra= 14:13:27.8, dec= -5:30:45.4;
ra= 14:13:10.8, dec= -5:40:19.3;
ra= 14:12:39.2, dec= -5:44:15.7;
ra= 14:12:19.2, dec= -5:38:14.0;
ra= 14:11:42.8, dec= -5:40:40.7;
ra= 14:10:46.0, dec= -5:37:47.9.
We thank A. Zanichelli for her rapid work in scheduling these ToO observations.