Radio and Gamma-Ray Monitoring of Strongly Lensed Quasars and Blazars

Rumbaugh, N., Fassnacht, C., McKean, J., Koopmans, L., Auger, M., Suyu, S. & Marshall, P. J., 1-Jan-2015, In : Bulletin of the American Astronomical Society. 225

Research output: Contribution to journalArticleAcademicpeer-review

We observed six strongly lensed, radio-loud quasars (MG 0414+0534, CLASS B0712+472, JVAS B1030+074, CLASS B1127+385, CLASS B1152+199, and JVAS B1938+666) in order to identify systems suitable for measuring cosmological parameters using time delays between their multiple images. Two separate monitoring campaigns were carried out using the VLA. We found evidence for variability in a majority of the lightcurves. B0712 and B1030 had particularly strong variations, exhibiting linear flux trends. These results show that most of these systems should be targeted with followup monitoring campaigns, especially B0712 and B1030. In additional to these follow-up campaigns, future work will involve searching for and performing time delay measurements on lensed blazars using the Fermi gamma-ray telescope, following the proof of concept by Cheung et al. 2014. Discrepancies between gamma-ray and radio time delays of B0218 suggest physically separated emissions sources. We plan to extend study of emission regions to other lensed blazars.
Original languageEnglish
JournalBulletin of the American Astronomical Society
Publication statusPublished - 1-Jan-2015

ID: 21929243