SIMBAD references

2020ApJ...897....5N - Astrophys. J., 897, 5-5 (2020/July-1)

Measuring HERA's primary beam in situ: methodology and first results.

NUNHOKEE C.D., PARSONS A.R., KERN N.S., NIKOLIC B., POBER J.C., BERNARDI G., CARILLI C.L., ABDURASHIDOVA Z., AGUIRRE J.E., ALEXANDER P., ALI Z.S., BALFOUR Y., BEARDSLEY A.P., BILLINGS T.S., BOWMAN J.D., BRADLEY R.F., BURBA J., CHENG C., DEBOER D.R., DEXTER M., DE LERA ACEDO E., DILLON J.S., EWALL-WICE A., FAGNONI N., FRITZ R., FURLANETTO S.R., GALE-SIDES K., GLENDENNING B., GORTHI D., GREIG B., GROBBELAAR J., HALDAY Z., HAZELTON B.J., HEWITT J.N., JACOBS D.C., JULIUS A., KERRIGAN J., KITTIWISIT P., KOHN S.A., KOLOPANIS M., LANMAN A., LA PLANTE P., LEKALAKE T., LIU A., MacMAHON D., MALAN L., MALGAS C., MAREE M., MARTINOT Z.E., MATSETELA E., MESINGER A., MOLEWA M., MORALES M.F., MOSIANE T., NEBEN A.R., PATRA N., PIETERSE S., RAZAVI-GHODS N., RINGUETTE J., ROBNETT J., ROSIE K., SIMS P., SMITH C., SYCE A., THYAGARAJAN N., WILLIAMS P.K.G. and ZHENG H.

Abstract (from CDS):

The central challenge in 21 cm cosmology is isolating the cosmological signal from bright foregrounds. Many separation techniques rely on the accurate knowledge of the sky and the instrumental response, including the antenna primary beam. For drift-scan telescopes, such as the Hydrogen Epoch of Reionization Array (HERA), that do not move, primary beam characterization is particularly challenging because standard beam-calibration routines do not apply (Cornwell et al.) and current techniques require accurate source catalogs at the telescope resolution. We present an extension of the method from Pober et al. where they use beam symmetries to create a network of overlapping source tracks that break the degeneracy between source flux density and beam response and allow their simultaneous estimation. We fit the beam response of our instrument using early HERA observations and find that our results agree well with electromagnetic simulations down to a -20 dB level in power relative to peak gain for sources with high signal-to-noise ratio. In addition, we construct a source catalog with 90 sources down to a flux density of 1.4 Jy at 151 MHz.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Cosmology - H I line emission - Radio astronomy

VizieR on-line data: <Available at CDS (J/ApJ/897/5): table2.dat>

Simbad objects: 89

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2020ApJ...897....5N and select 'bookmark this link' or equivalent in the popup menu