2021AJ....161..163P

Query : 2021AJ....161..163P

2021AJ....161..163P - Astron. J., 161, 163-163 (2021/April-0)

Commissioning the H I observing mode of the beam former for the cryogenically cooled Focal L-band Array for the GBT (FLAG).

PINGEL N.M., PISANO D.J., RUZINDANA M., BURNETT M., RAJWADE K.M., BLACK R., JEFFS B., WARNICK K.F., LORIMER D.R., ROSHI D.A., PRESTAGE R., McLAUGHLIN M.A., AGARWAL D., CHAMBERLIN T., HAWKINS L., JENSEN L., MARGANIAN P., NELSON J.D., SHILLUE W., SMITH E., SIMON B., VAN TONDER V. and WHITE S.

Abstract (from CDS):

We present the results of commissioning observations for a new digital beam-forming back end for the Focal plane L-band Array for the Robert C. Byrd Green Bank Telescope (FLAG), a cryogenically cooled Phased Array Feed (PAF) with the lowest measured Tsys/η of any PAF outfitted on a radio telescope to date. We describe the custom software used to apply beam-forming weights to the raw element covariances to create research-quality spectral-line images for the new fine-channel mode, study the stability of the beam weights over time, characterize FLAG's sensitivity over a frequency range of 150 MHz, and compare the measured noise properties and observed distribution of neutral hydrogen emission from several extragalactic and Galactic sources with data obtained with the current single-pixel L-band receiver. These commissioning runs establish FLAG as the preeminent PAF receiver currently available for spectral-line observations on the world's major radio telescopes.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Astronomical instrumentation - Observational astronomy - Neutral hydrogen clouds - HI line emission - Radio astronomy

Simbad objects: 22

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Number of rows : 22
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
3 NAME Per B SyG 04 37 04.37535450 +29 40 13.8179631   21.7       ~ 533 2
4 3C 134 rG 05 04 42.190 +38 06 11.40   20       ~ 90 1
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
6 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1573 1
7 LEDA 4320422 LSB 12 18 11.07 +46 55 00.7           ~ 26 1
8 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2512 4
9 HIJASS J1219+46 G 12 19 52.78 +46 35 27.3           ~ 2 0
10 NGC 4288 GiG 12 20 38.119 +46 17 27.67   13.6       ~ 187 0
11 Z 244-7 GiG 12 21 15.01 +45 48 40.8   14.8       ~ 123 2
12 NAME CVn II Group GrG 12 26 +44.2           ~ 23 0
13 3C 295 Sy1 14 11 20.6 +52 12 09   22.34 20.80 18.54   ~ 1021 4
14 MCG+01-43-006 SyG 16 51 07.9886687784 +04 59 35.547131472     18.25     ~ 502 1
15 LDN 149 DNe 17 27.0 -20 53           ~ 7 0
16 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
17 UGC 11583 LSB 20 30 15.30 +60 26 25.0   17       ~ 66 0
18 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2
19 NGC 7162 Sy2 21 59 39.0212245824 -43 18 22.098758760   13.36   12.36 12.8 ~ 72 0
20 NGC 7232 GiP 22 15 38.0197322088 -45 51 00.409784904   12.58 11.79 11.00 11.9 ~ 62 0
21 NGC 7233 GiP 22 15 48.992 -45 50 47.06   12.90 12.82 11.81   ~ 55 0
22 IC 1459 rG 22 57 10.60682195 -36 27 43.9966421   10.96 11.85 9.34 10.3 ~ 652 2

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