2015ApJ...808L...1A

Query : 2015ApJ...808L...1A

2015ApJ...808L...1A - Astrophys. J., 808, L1 (2015/July-3)

The 2014 ALMA long baseline campaign: an overview.

ALMA PARTNERSHIP, FOMALONT E.B., VLAHAKIS C., CORDER S., REMIJAN A., BARKATS D., LUCAS R., HUNTER T.R., BROGAN C.L., ASAKI Y., MATSUSHITA S., DENT W.R.F., HILLS R.E., PHILLIPS N., RICHARDS A.M.S., COX P., AMESTICA R., BROGUIERE D., COTTON W., HALES A.S., HIRIART R., HIROTA A., HODGE J.A., IMPELLIZZERI C.M.V., KERN J., KNEISSL R., LIUZZO E., MARCELINO N., MARSON R., MIGNANO A., NAKANISHI K., NIKOLIC B., PEREZ J.E., PEREZ L.M., TOLEDO I., ALADRO R., BUTLER B., CORTES J., CORTES P., DHAWAN V., DI FRANCESCO J., ESPADA D., GALARZA F., GARCIA-APPADOO D., GUZMAN-RAMIREZ L., HUMPHREYS E.M., JUNG T., KAMENO S., LAING R.A., LEON S., MANGUM J., MARCONI G., NAGAI H., NYMAN L.-A., RADISZCZ M., RODON J.A., SAWADA T., TAKAHASHI S., TILANUS R.P.J., VAN KEMPEN T., VILA VILARO B., WATSON L.C., WIKLIND T., GUETH F., TATEMATSU K., WOOTTEN A., CASTRO-CARRIZO A., CHAPILLON E., DUMAS G., DE GREGORIO-MONSALVO I., FRANCKE H., GALLARDO J., GARCIA J., GONZALEZ S., HIBBARD J.E., HILL T., KAMINSKI T., KARIM A., KRIPS M., KURONO Y., LOPEZ C., MARTIN S., MAUD L., MORALES F., PIETU V., PLARRE K., SCHIEVEN G., TESTI L., VIDELA L., VILLARD E., WHYBORN N., ZWAAN M.A., ALVES F., ANDREANI P., AVISON A., BARTA M., BEDOSTI F., BENDO G.J., BERTOLDI F., BETHERMIN M., BIGGS A., BOISSIER J., BRAND J., BURKUTEAN S., CASASOLA V., CONWAY J., CORTESE L., DABROWSKI B., DAVIS T.A., DIAZ TRIGO M., FONTANI F., FRANCO-HERNANDEZ R., FULLER G., GALVAN MADRID R., GIANNETTI A., GINSBURG A., GRAVES S.F., HATZIMINAOGLOU E., HOGERHEIJDE M., JACHYM P., JIMENEZ SERRA I., KARLICKY M., KLAASEN P., KRAUS M., KUNNERIATH D., LAGOS C., LONGMORE S., LEURINI S., MAERCKER M., MAGNELLI B., MARTI VIDAL I., MASSARDI M., MAURY A., MUEHLE S., MULLER S., MUXLOW T., O'GORMAN E., PALADINO R., PETRY D., PINEDA J., RANDALL S., RICHER J.S., ROSSETTI A., RUSHTON A., RYGL K., SANCHEZ MONGE A., SCHAAF R., SCHILKE P., STANKE T., SCHMALZL M., STOEHR F., URBAN S., VAN KAMPEN E., VLEMMINGS W., WANG K., WILD W., YANG Y., IGUCHI S., HASEGAWA T., SAITO M., INATANI J., MIZUNO N., ASAYAMA S., KOSUGI G., MORITA K.-I., CHIBA K., KAWASHIMA S., OKUMURA S.K., OHASHI N., OGASAWARA R., SAKAMOTO S., NOGUCHI T., HUANG Y.-D., LIU S.-Y., KEMPER F., KOCH P.M., CHEN M.-T., CHIKADA Y., HIRAMATSU M., IONO D., SHIMOJO M., KOMUGI S., KIM J., LYO A.-R., MULLER E., HERRERA C., MIURA R.E., UEDA J., CHIBUEZE J., SU Y.-N., TREJO-CRUZ A., WANG K.-S., KIUCHI H., UKITA N., SUGIMOTO M., KAWABE R., HAYASHI M., MIYAMA S., HO P.T.P., KAIFU N., ISHIGURO M., BEASLEY A.J., BHATNAGAR S., BRAATZ III J.A., BRISBIN D.G., BRUNETTI N., CARILLI C., CROSSLEY J.H., D'ADDARIO L., DONOVAN MEYER J.L., EMERSON D.T., EVANS A.S., FISHER P., GOLAP K., GRIFFITH D.M., HALE A.E., HALSTEAD D., HARDY E.J., HATZ M.C., HOLDAWAY M., INDEBETOUW R., JEWELL P.R., KEPLEY A.A., KIM D.-C., LACY M.D., LEROY A.K., LISZT H.S., LONSDALE C.J., MATTHEWS B., McKINNON M., MASON B.S., MOELLENBROCK G., MOULLET A., MYERS S.T., OTT J., PECK A.B., PISANO J., RADFORD S.J.E., RANDOLPH W.T., VENKATA U.R., RAWLINGS M.G., ROSEN R., SCHNEE S.L., SCOTT K.S., SHARP N.K., SHETH K., SIMON R.S., TSUTSUMI T. and WOOD S.J.

Abstract (from CDS):

A major goal of the Atacama Large Millimeter/submillimeter Array (ALMA) is to make accurate images with resolutions of tens of milliarcseconds, which at submillimeter (submm) wavelengths requires baselines up to ∼15 km. To develop and test this capability, a Long Baseline Campaign (LBC) was carried out from 2014 September to late November, culminating in end-to-end observations, calibrations, and imaging of selected Science Verification (SV) targets. This paper presents an overview of the campaign and its main results, including an investigation of the short-term coherence properties and systematic phase errors over the long baselines at the ALMA site, a summary of the SV targets and observations, and recommendations for science observing strategies at long baselines. Deep ALMA images of the quasar 3C 138 at 97 and 241 GHz are also compared to VLA 43 GHz results, demonstrating an agreement at a level of a few percent. As a result of the extensive program of LBC testing, the highly successful SV imaging at long baselines achieved angular resolutions as fine as 19 mas at ∼350 GHz. Observing with ALMA on baselines of up to 15 km is now possible, and opens up new parameter space for submm astronomy.

Abstract Copyright: ∼

Journal keyword(s): instrumentation: interferometers - submillimeter: general - techniques: high angular resolution - techniques: interferometric - telescopes

Simbad objects: 12

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Number of rows : 12
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 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
2 * omi Cet Mi* 02 19 20.79210 -02 58 39.4956   7.63 6.53 5.03   M5-9IIIe+DA 1586 0
3 V* HL Tau Or* 04 31 38.5107609312 +18 13 57.859747968   15.89 14.49 14.39   K5 1546 0
4 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 797 0
5 QSO B0454-463 Bla 04 55 50.77248730 -46 15 58.6797903   17.89 17.4 16.87   ~ 229 1
6 QSO B0507+179 Bla 05 10 02.36912937 +18 00 41.5815635   20.0 19.0 19.09   ~ 470 1
7 ICRF J052109.8+163822 Sy1 05 21 09.88596258 +16 38 22.0515459   19.37 18.84 18.480   ~ 910 1
8 ESO 362-21 BLL 05 22 57.98464178 -36 27 30.8512953   15.26 14.62 14.48   ~ 873 2
9 QSO J0530+13 Bla 05 30 56.41674741 +13 31 55.1494688     20.00 19.35   ~ 1004 1
10 QSO B0537-441 BLL 05 38 50.36155950 -44 05 08.9390233   15.77 16.48 16   ~ 924 2
11 SDP 81 LeG 09 03 11.574 +00 39 06.55           ~ 106 0
12 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1

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