2022ApJ...932..100C

Query : 2022ApJ...932..100C

2022ApJ...932..100C - Astrophys. J., 932, 100-100 (2022/June-3)

Using the Sun to Measure the Primary Beam Response of the Canadian Hydrogen Intensity Mapping Experiment.

CHIME COLLABORATION, AMIRI M., BANDURA K., BOSKOVIC A., CLICHE J.-F., DENG M., DOBBS M., FANDINO M., FOREMAN S., HALPERN M., HILL A.S., HINSHAW G., HOFER C., KANIA J., LANDECKER T.L., MacEACHERN J., MASUI K., MENA-PARRA J., NEWBURGH L., ORDOG A., PINSONNEAULT-MAROTTE T., POLZIN A., REDA A., SHAW J.R., SIEGEL S.R., SINGH S., VANDERLINDE K., WANG H., WILLIS J.S. and WULF D.

Abstract (from CDS):

We present a beam pattern measurement of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) made using the Sun as a calibration source. As CHIME is a pure drift-scan instrument, we rely on the seasonal north-south motion of the Sun to probe the beam at different elevations. This semiannual range in elevation, combined with the radio brightness of the Sun, enables a beam measurement that spans ∼7200 square degrees on the sky without the need to move the telescope. We take advantage of observations made near solar minimum to minimize the impact of solar variability, which is observed to be <10% in intensity over the observation period. The resulting data set is highly complementary to other CHIME beam measurements-both in terms of angular coverage and systematics-and plays an important role in the ongoing program to characterize the CHIME primary beam.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Radio telescopes - Interferometers - Calibration - Quiet sun

Simbad objects: 4

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Number of rows : 4
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 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
2 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
3 NAME Sgr 1935+2154 * 19 34 55.68 +21 53 48.2           ~ 820 1
4 MCG+07-41-003 Bla 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2537 2

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