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Project status and specifications Douglas Bock Project Manager. 1. Berkeley-Illinois-Maryland Assn. array 10 6.1-m diameter antennas. Caltech array 6 10.4-m antennas. + UChicago SZA 8 3.5-m antennas. 2. BIMA mosaic of M33. CO 1-0 115 GHz

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project status and specifications douglas bock project manager
Project status and specifications

Douglas Bock

Project Manager

1

slide2

Berkeley-Illinois-Maryland Assn. array 10 6.1-m diameter antennas

Caltech array 6 10.4-m antennas

+ UChicago SZA 8 3.5-m antennas

2

bima mosaic of m33
BIMA mosaic of M33
  • CO 1-0 115 GHz
  • 759 pointing centers

3

bima mosaic of m33 engargiola et al 2003
BIMA mosaic of M33(Engargiola et al. 2003)
  • 148 GMCs detected
  • overlie HI filaments (HI image: Deul & van der Hulst 1987)

4

mm wavelength t tauri outburst in orion
MM Wavelength T Tauri Outburst in Orion
  • 2nd most luminous stellar radio outburst
  • Briefly, brightest object in nebula
  • Required long baselines for detection
  • Magnetized T Tauri outburst
  • Contemporaneous with X-ray outburst

BIMA A configuration images

(Bower, Plambeck, Bolatto et al.)

5

antennas
antennas

3 different antenna diameters - a heterogeneous array

  • sensitive to wide range of spatial frequencies; image large objects, search large areas
  • FOV of 8-m equivalent antenna (BIMA+OVRO) is 1.3’ at 100 GHz and 0.6’ at 230 GHz
  • SZA FOV more than twice as large
  • OVRO drive upgrade within next year to allow rapid source switching

15

sensitivity
sensitivity

Line:

1 km/sec

Continuum

Factor of 5 to 20 better than present performance

16

receivers
receivers

for the 1mm and 3mm bands:

  • 4 GHz bandwidth, 1 polarization
  • continuum sensitivity: 2-3 mJy/beam, in 1 minute
  • 230 GHz brightness sensitivity: 1 K for 1 km/sec channel, 1'' beam, in 1 hour

17

first light correlator
first light correlator
  • uses COBRA hardware design
  • 15 telescopes, 105 baselines
  • 8 independent sections:
    • may be positioned anywhere in 4 GHz IF band
    • choose 2, 8, 31, 62, 125, 250, or 500 MHz bandwidth
    • velocity resolution 0.04 to 40 km s-1/ channel at 1.3 mm
  • 0.5 second integrations

separateSZA correlator: 8 antennas, 28 baselines, 8 GHz bandwidth

20