IRDC18223 images (Beuther+, 2015)

Author(s)

H. Beuther, S. E. Ragan, K. Johnston, T. Henning, A. Hacar, J. T. Kainulainen

Abstract

The IRDC 18223 filament was observed during a series of 8 tracks between June 2013 and April 2014 in the D- (with 5 antennas) and C-array (with 6 antennas) configurations of the Plateau de Bure Interferometer (PdBI). The projected baselines ranged between 15 and 175m. While the absolute reference position was RA=18:25:09.533 and Dec=-12:43:55.90 (J2000), ten mosaic pointings were required to cover the length of the filament. The adopted velocity of rest v_lsr of the system is 45.3km/s. Bandpass calibration was conducted with either of 3C 279, 2200+420, 1633+382 or 3C 345. The absolute flux calibration was performed with MWC349 and is estimated to be correct to within ~15%. Phase and amplitude calibration was conducted with regular observations of the quasars 1730-130 and 1741-038. The spectral coverage of the wide-band receiver and correlator unit ranged from 91.53 to 95.14GHz. Almost the whole bandpass was used to extract the 3.2mm continuum emission (a small band around the N₂H⁺(1-0) was excluded). The narrow-band correlator units focused mainly on the N₂H⁺(1-0) and ¹³CS(2-1) lines. The nominal channel separation was 0.039MHz, and we smoothed the data to 0.2km/s spectral resolution for our final data-cubes.(2 data files).

Organisation(s)

Department of Astrophysics

External organisation(s)

Max-Planck-Institut für Astronomie, University of Leeds

Publication date

10-2015

Austrian Fields of Science 2012

103004 Astrophysics

Portal url

https://ucrisportal.univie.ac.at/en/publications/irdc18223-images-beuther-2015(59b2862f-d1ab-4ffc-af6a-bbc9229aa73f).html