NATIONAL ASTRONOMY AND IONOSPHERE CENTER ALFA : Radio Astronomy in the Multibeam Era The ALFA Project Avinash Deshpande Senior Research Associate Radio Astronomy Group ALFA Scientific Coordinator NATIONAL ASTRONOMY AND IONOSPHERE CENTER Arecibo L-Band Feed Array Will revolutionize our ability to survey the sky Brings new observing paradigm to NAIC NATIONAL ASTRONOMY AND ... Survey" projects ALFA is ~7 times faster than an L-band single-pixel system. ...
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Ссылки http://www.naic.edu/alfa/ealfa/meeting1/talks/deshpande.pdf -- 1441.3 Кб -- 08.05.2006 Похожие документы
. N A T I O N A L аа A S T R O N O M Y аа A N D аа I O N O S P H E R E аа C E N T E R . ALFA: . Radio Astronomy in the Multibeam Era . The ALFA Project . Avinash Deshpande . Senior Research Associate . Radio Astronomy Group . ALFA Scientific Coordinator .
... NATIONAL ASTRONOMY AND IONOSPHERE CENTER The frequency range covered by alpha is from 1225 to 1525 MHz NATIONAL ASTRONOMY AND IONOSPHERE CENTER NATIONAL ASTRONOMY AND IONOSPHERE CENTER NATIONAL ASTRONOMY AND IONOSPHERE CENTER GPS L1, L2, L5 L5 L2 L1 General coverage -158 dBW Spot Beam -138 dBW Alpha 1225 - 1525 NATIONAL ASTRONOMY AND ...
. N A T I O N A L аа A S T R O N O M Y аа A N D аа I O N O S P H E R E аа C E N T E R . RFI а in the alpha band pass . Murray Lewis . Senior Research Associate . Radio Astronomy Group .
ALFA IF/LO System Lisa Wray Edgar Castro Electronics Division ALFA IF/LO System ALFA Galactic Consortium March 2003 ALFA Receiver System Front End § 7 element feed array § corcal available § 40 dB gain § Bandpass filter module Downconverter § Single frequency downconversion § RF: 1225-1525 MHz § IF: 150-450 MHz § Power monitor § Fiber optic converter Buffer ...
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Ссылки http://www.naic.edu/alfa/ealfa/meeting1/talks/lwray.pdf -- 893.9 Кб -- 08.05.2006
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Ссылки http://www.naic.edu/alfa/galfa/meetings/1/talks/GALFA_IFLO_LisaWray.pdf -- 893.9 Кб -- 08.05.2006 Похожие документы
Using the Parkes Multibeam to Search for HVC Analogs D.J. Pisano (ATNF) with David Barnes (Melbourne), Brad Gibson (Swinburne), Lister Staveley-Smith (ATNF), Ken Freeman (RSAA/ANU) Possible analogs to Local Group HVCs courtesy B. Wakker Blitz et al. (1999) and Braun & Burton (1999) suggest that some HVCs have median distances of 500 kpc 1 Mpc and HI masses of 106-7 M0. ... The Local Group of galaxies is a loose group. ... Multibeam Observations of LGG 93, 180, & 478 Group Galaxies Velocity Area Vel. ...
. Using the Parkes Multibeam to . Search for HVC Analogs . D.J. Pisano (ATNF) . with David Barnes (Melbourne), Brad Gibson . (Swinburne), Lister Staveley-Smith (ATNF), . Ken Freeman (RSAA/ANU) .
... 2000) HVCs as Local Group Building Blocks? Grebel 1998 Compact HVC Typical HI Masses and Sizes · · · MHI ~ 4.5 D2 ( kpc ) Size ~ 0.4 deg2 NHI ~ 1019 cm-2 At 500 kpc dHI=6 kpc cm-3 nHI =5 x 10-4 cm-3 At 5 MHI dHI nHI kpc = 115 Mo = 60 pc = 5 x 10-2 cm-3 At 50 kpc dHI=600 pc nHI =5 x 10-3 At 1 Mpc dHI=12 kpc nHI =2.5 x 10-4 cm-3 MHI =1.15 x 104 Mo MHI =1.15 x 106 Mo MHI =4.6 x 106 Mo HVC Distances · Direct ... What type of environment are galaxies with HVCs found in? ...