Radboud Repository

      View Item 
      •   Radboud Repository
      • Collections Radboud University
      • Datasets
      • View Item
      •   Radboud Repository
      • Collections Radboud University
      • Datasets
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.
      BrowseAll of RepositoryCollectionsDepartmentsDate IssuedAuthorsTitlesDocument typeThis CollectionDepartmentsDate IssuedAuthorsTitlesDocument type
      StatisticsView Item Statistics

      W51 Main NH3 and CH3OH data cubes

      Find Full text
      Creators
      Goddi, C.
      Ginsburg, A.
      Zhang, Q
      Date of Archiving
      2016
      Archive
      ViZieR
      Related links
      http://vizier.cfa.harvard.edu/viz-bin/VizieR?-source=J/A+A/589/A44
      Publication type
      Dataset
      Access level
      Open access
      Please use this identifier to cite or link to this item: https://hdl.handle.net/2066/167431   https://hdl.handle.net/2066/167431
      Display more detailsDisplay less details
      Organization
      Astrophysics
      Audience(s)
      Astronomy, astrophysics
      Key words
      NRAO; B configuration
      Abstract
      Observations of NH3 toward the W51 complex were conducted usi Karl G. Jansky Very Large Array (JVLA) of the National Radio Astronomy Observatory (NRAO)1 in the B configuration. By using the broadband JVLA K- and Ka-band receivers, we observed a total of five metastable inversion transitions of NH3: (J,K) = (6, 6), (7, 7), (9, 9), (10, 10), and (13, 13) at the 1cm band with frequencies ranging from ~25GHz for the (6, 6) line to ~33GHz for the (13, 13) line. Transitions were observed in pairs of independently tunable basebands during 6h tracks (two targets per track: W51 - this paper; NGC 7538 IRS1 - Paper I, Goddi et al., 2015A&A...573A.108G) on three different dates in 2012: the (6, 6) and (7, 7) lines on May 31 at K-band, the (9, 9) and (13, 13) lines on June 21, and the (10, 10) transition on August 7, both at Ka-band. Each baseband had eight sub-bands with a 4MHz bandwidth (~40km/s at 30GHz), providing a total coverage of 32MHz (~320km/s at 30GHz). Each sub-band consisted of 128 channels with a separation of 31.25kHz (~0.3km/s at 30GHz). The typical on-source integration time was about 80min. Each transition was observed with fast switching, where 80s scans on target were alternated with 40s scans on the nearby (1.2° on the sky) QSO J1924+1540 (measured flux density 0.6-0.7Jy, depending on frequency). We derived absolute flux calibration from observations of 3C 48 (Sν=0.5-0.7Jy, depending on frequency), and bandpass calibration from observations of 3C 84 (Sν=27-29Jy, depending on frequency). (2 data files).
      This item appears in the following Collection(s)
      • Datasets [1269]
      • Faculty of Science [32153]
       
      •  Upload Full Text
      •  Terms of Use
      •  Notice and Takedown
      Bookmark and Share
      Admin login