The Hitachi and Takahagi 32 m radio telescopes: Upgrade of the antennas from satellite communication to radio astronomy

被引：33

作者：

Yonekura, Yoshinori ^{[1
]}

Saito, Yu ^{[1
]}

Sugiyama, Koichiro ^{[1
]}

Soon, Kang Lou ^{[2
]}

Momose, Munetake ^{[2
]}

Yokosawa, Masayoshi ^{[2
]}

Ogawa, Hideo ^{[3
]}

Kimura, Kimihiro ^{[3
]}

Abe, Yasuhiro ^{[3
]}

Nishimura, Atsushi ^{[3
,18
]}

Hasegawa, Yutaka ^{[3
]}

Fujisawa, Kenta ^{[4
,5
]}

Ohyama, Tomoaki ^{[6
]}

Kono, Yusuke ^{[6
]}

Miyamoto, Yusuke ^{[1
,19
]}

Sawada-Satoh, Satoko ^{[1
]}

Kobayashi, Hideyuki ^{[7
]}

Kawaguchi, Noriyuki ^{[7
]}

Honma, Mareki ^{[6
,8
]}

Shibata, Katsunori M. ^{[7
]}

Sato, Katsuhisa ^{[6
]}

Ueno, Yuji ^{[6
]}

Jike, Takaaki ^{[6
]}

Tamura, Yoshiaki ^{[6
,8
]}

Hirota, Tomoya ^{[7
,8
]}

Miyazaki, Atsushi ^{[9
,20
]}

Niinuma, Kotaro ^{[5
,21
]}

Sorai, Kazuo ^{[10
]}

Takaba, Hiroshi ^{[11
]}

Hachisuka, Kazuya ^{[4
,22
]}

Kondo, Tetsuro ^{[12
]}

Sekido, Mamoru ^{[12
]}

Murata, Yasuhiro ^{[13
,14
]}

Nakai, Naomasa ^{[15
,16
]}

Omodaka, Toshihiro ^{[17
]}

机构：

[1] Ibaraki Univ, Ctr Astron, 2-1-1 Bunkyo, Mito, Ibaraki 3108512, Japan

[2] Ibaraki Univ, Coll Sci, 2-1-1 Bunkyo, Mito, Ibaraki 3108512, Japan

[3] Osaka Prefecture Univ, Dept Phys Sci, Naka Ku, 1-1 Gakuen Cho, Sakai, Osaka 5998531, Japan

[4] Yamaguchi Univ, Res Inst Time Studies, 1677-1 Yoshida, Yamaguchi, Yamaguchi 7538511, Japan

[5] Yamaguchi Univ, Grad Sch Sci & Engn, 1677-1 Yoshida, Yamaguchi, Yamaguchi 7538512, Japan

[6] Natl Astron Observ Japan, Mizusawa VLBI Observ, Mizusawa Ku, 2-12 Hoshigaoka Cho, Mizusawa, Iwate 0230861, Japan

[7] NAOJ, Mizusawa VLBI Observ, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[8] SOKENDAI, Dept Astron Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[9] Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 305348, South Korea

[10] Hokkaido Univ, Dept Cosmosci, Dept Phys, Kita Ku, Kita 10 Nishi 8, Sapporo, Hokkaido 0600810, Japan

[11] Gifu Univ, Fac Engn, 1-1 Yanagido, Gifu, Gifu 5011193, Japan

[12] Natl Inst Informat & Commun Technol, Kashima Space Technol Ctr, 893-1 Hirai, Kashima, Ibaraki 3148501, Japan

[13] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuo Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2525210, Japan

[14] SOKENDAI, Dept Space & Astronaut Sci, Chuo Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2525210, Japan

[15] Univ Tsukuba, Fac Pure & Appl Sci, Div Phys, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058571, Japan

[16] Univ Tsukuba, Ctr Integrated Res Fundamental Sci & Technol CiRf, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058571, Japan

[17] Kagoshima Univ, Grad Sch Sci & Engn, Dept Phys & Astron, 1-21-35 Korimoto, Kagoshima, Kagoshima 8900065, Japan

[18] Nagoya Univ, Dept Astrophys, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648602, Japan

[19] NAOJ, Nobeyama Radio Observ, 462-2 Nobeyama, Minamimaki, Nagano 3841305, Japan

[20] Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[21] Yamaguchi Univ, Grad Sch Sci & Technol Innovat, 1677-1 Yoshida, Yamaguchi, Yamaguchi 7538512, Japan

[22] NAOJ, Mizusawa VLBI Observ, Mizusawa Ku, 2-12 Hoshigaoka Cho, Oshu, Iwate 0230861, Japan

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2016年 / 68卷 / 05期

基金：

日本学术振兴会;

关键词：

instrumentation: detectors; instrumentation: interferometers; masers; radio continuum: general; radio lines: general; MULTIBEAM MASER CATALOG; GHZ METHANOL MASER; PERIODIC VARIABILITY; BURSTING ACTIVITY; REGION; DISCOVERY;

D O I：

10.1093/pasj/psw045

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Hitachi and Takahagi 32 m radio telescopes (former satellite communication antennas) were so upgraded as to work at 6, 8, and 22 GHz. We developed the receiver systems, IF systems, back-end systems (including samplers and recorders), and reference systems. We measured the performance of the antennas. The system temperature including the atmosphere toward the zenith, T*(sys), is measured to be similar to 30-40 K for 6 GHz and similar to 25-35 K for 8 GHz. T*(sys) for 22 GHz is measured to be similar to 40-100 K in winter and similar to 150-500K in summer seasons, respectively. The aperture efficiency is 55%-75% for Hitachi at 6 GHz and 8 GHz, and 55%-65% for Takahagi at 8 GHz. The beam sizes at 6 GHz and 8 GHz are similar to 4.'6 and similar to 3.'8, respectively. The side-lobe level is less than 3%-4% at 6 and 8 GHz. Pointing accuracy was measured to be better than similar to 0.'3 for Hitachi and similar to 0.'6 for Takahagi. We succeeded in VLBI observations in 2010 August, indicating good performance of the antenna. We started single-dish monitoring observations of 6.7 GHz methanol maser sources in 2012 December, and found several new sources showing short-term periodic variation of the flux density.

引用

页数：16

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