Swift/UVOT observation of the enhanced nuclear activity from NGC 1566
ATel #11786; P. Kuin (MSSL/UCL, UK), E. Bozzo, C. Ferrigno, V. Savchenko (ISDC, CH), E. Kuulkers (ESA/ESTEC, NL), C. Sanchez-Fernandez (ESAC/ESA, Spain) L. Ducci (IAAT, Germany/ISDC, CH)
on 27 Jun 2018; 15:31 UT
Credential Certification: Carlo Ferrigno (Carlo.Ferrigno@unige.ch)
Subjects: Ultra-Violet, AGN
We report on the UVOT data collected during the Neil Gehrels Swift observation, carried out on 2018 June 24 (ATel #11783) after the INTEGRAL discovery of an enhanced hard X-ray emission from the Seyfert galaxy NGC 1566 (ATel #11754).
In the UV band, a clear brightening of the point-like core of the Galaxy is visible compared to archival observations. The estimated UVW2 magnitude from the 2018 observation is 12.48, with an associated statistical (systematic) uncertainty of 0.01 (0.03) mag. Archival observations of NGC 1566 in the same filter were carried out on 2012 December 9 and 2015 August 9. The estimated VEGA magnitude for the 2012 observation was 15.35, with an associated statistical (systematic) uncertainty of 0.02 (0.03) mag. The 2015 observation gave compatible results to within the uncertainties with respect to the 2012 observation.
We also report for completeness that the AB magnitudes of NGC 1566 measured in 2018 and 2012 were 14.21 (associated statistical and systematic uncertainties of 0.01 mag and 0.03 mag) and 17.08 (associated statistical and systematic uncertainties of 0.02 mag and 0.03 mag), respectively.
The 2012 and 2018 UVOT images are visible at this link.
