2022A&A...668A...2M


Query : 2022A&A...668A...2M

2022A&A...668A...2M - Astronomy and Astrophysics, volume 668A, 2 (2022/12-1)

SEPIA345: A 345 GHz dual polarization heterodyne receiver channel for SEPIA at the APEX telescope.

MELEDIN D., LAPKIN I., FREDRIXON M., SUNDIN E., FERM S.-E., PAVOLOTSKY A., STRANDBERG M., DESMARIS V., LOPEZ C., BERGMAN P., OLBERG M., CONWAY J., TORSTENSSON K., DURAN C., MONTENEGRO-MONTES F.M., DE BREUCK C. and BELITSKY V.

Abstract (from CDS):

Context. We describe the new SEPIA345 heterodyne receiver channel installed at the Atacama Pathfinder EXperiment (APEX) telescope, including details of its configuration, characteristics, and test results on sky. SEPIA345 is designed and built to be a part of the Swedish ESO PI Instrument for the APEX telescope (SEPIA). This new receiver channel is suitable for very high-resolution spectroscopy and covers the frequency range 272-376 GHz. It utilizes a dual polarization sideband separating (2SB) receiver architecture, employing superconductor-isolator-superconductor mixers (SIS), and provides an intermediate frequency (IF) band of 4-12 GHz for each sideband and polarization, thus covering a total instantaneous IF bandwidth of 4 × 8 = 32 GHz. Aims. This paper provides a description of the new receiver in terms of its hardware design, performance, and commissioning results. Methods. The methods of design, construction, and testing of the new receiver are presented. Results. The achieved receiver performance in terms of noise temperature, sideband rejection, stability, and other parameters are described. Conclusions. SEPIA345 is a commissioned APEX facility instrument with state-of-the-art wideband IF performance. It has been available on the APEX telescope for science observations since July 2021.

Abstract Copyright: © D. Meledin et al. 2022

Journal keyword(s): instrumentation: detectors - techniques: spectroscopic - submillimeter: general

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 V* R Dor AB* 04 36 45.59127 -62 04 37.7974 7.84 6.98 5.40 2.71 -0.44 M8III:e 334 0
2 NAME Ori B9 Cloud Cld 05 42 30.5 -01 20 33           ~ 22 0
3 NAME Orion B9-SMM 6 cor 05 43 05.1 -01 18 38           ~ 9 0
4 LBN 1037 RNe 07 05 16.9 -12 20 02           ~ 25 0
5 V* VY CMa s*r 07 22 58.3261352189 -25 46 03.194390594 12.01 10.068 8.691 7.938   M5Iae 1080 0
6 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 6932 3
7 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13681 0
8 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 2168 1

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2023.06.07-10:37:51

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