2023PASP..135b5002C

Query : 2023PASP..135b5002C

2023PASP..135b5002C - Publ. Astron. Soc. Pac., 135, part no 2, 5002 (2023/February-0)

A Characterization of the ALMA Phasing System at 345 GHz.

CREW G.B., GODDI C., MATTHEWS L.D., ROTTMANN H., SAEZ A. and MARTI-VIDAL I.

Abstract (from CDS):

The development of the Atacama Large Millimeter/submillimeter Array (ALMA) phasing system (APS) has allowed ALMA to function as an extraordinarily sensitive station for very long baseline interferometry (VLBI) at frequencies of up to 230 GHz (λ ≈ 1.3 mm). Efforts are now underway to extend the use of the APS to 345 GHz (λ ≈ 0.87 mm). Here we report a characterization of APS performance at 345 GHz based on a series of tests carried out between 2015 and 2021, including a successful global VLBI test campaign conducted in 2018 October in collaboration with the Event Horizon Telescope.

Abstract Copyright: © 2023. The Astronomical Society of the Pacific. All rights reserved.

Journal keyword(s): Astronomical instrumentation - Astronomical techniques - Astronomy data acquisition - Astronomy software - Millimeter astronomy - Radio astronomy - Radio interferometers - Very long baseline interferometry

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 QSO B0420-0127 Bla 04 23 15.80072217 -01 20 33.0656073   17.50 17.00 16.28   ~ 1263 3
2 QSO B0507+179 Bla 05 10 02.36912937 +18 00 41.5815635   20.0 19.0 19.09   ~ 470 1
3 ESO 362-21 BLL 05 22 57.98464178 -36 27 30.8512953   15.26 14.62 14.48   ~ 873 2
4 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
5 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
6 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
7 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
8 QSO B1921-293 BLL 19 24 51.05595254 -29 14 30.1210248   18.71 18.21 15.07   ~ 918 1
9 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1
10 4C 11.69 Bla 22 32 36.40890093 +11 43 50.9040592   17.75 17.33     ~ 1205 2
11 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 3004 2

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