Title: SgrA* and NRAS530 86GHz images
Creators: Brinkerink, C.D.; Müller, C.; Falcke, H.D.E. ; Issaoun, S.; Akiyama, Kazunori; Bower, G.C.; Krichbaum, T.P.; Deller, A.T.; Castillo, E.; Doeleman, Sheperd S.; Fraga Encinas, R.; Goddi, C.; Moscibrodzka, M.A.; Tilanus, R.P.J.; Zensus, J.A.
Date of Archiving: 2019
Archive: VizieR Online Data Catalog
Related links: http://vizier.cfa.harvard.edu/viz-bin/VizieR?-source=J/A+A/621/A119
Related publications: Micro-arcsecond structure of Sagittarius A* revealed by high-sensitivity 86 GHz ...
Publication type: Dataset
Access level : Open access

Please use this identifier to cite or link to this item : https://hdl.handle.net/2066/201826   https://hdl.handle.net/2066/201826

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Key words: Radio sources
Accretion
Interferometry
Organization: Astrophysics
Abstract:
We performed 86 GHz VLBI observations of Sgr A*. Here we present the analysis of two datasets: one epoch using the VLBA (all 86GHz capable stations1) together with the LMT (project code: BF114A) on May 22nd, 2015, and one epoch using VLBA, LMT, and GBT on May 23rd, 2015 (project code: BF114B). Both observations were made in left-circular polarization mode only, at a centre frequency of 86.068 GHz and a sampling rate of 2 Gbps (512 MHz on-sky bandwidth). For fringe finding we used the primary calibrators 3C 279 and 3C 454.3 at the start and end of the track respectively. In between, the scans alternated every 5-min between Sgr A* and the secondary fringe finder NRAO 530 ([HB89] 1730-130 with short regular gaps (every ~30min) for pointing and longer GBT-only gaps every ~4h for focusing.
Audience(s): Astronomy, astrophysics

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