Backend system
- Frequency Band
- 8-GHz Band
Mizusawa, Ogasawara, Ishigaki, Usuda, Hitachi, Yamaguchi - 22-GHz Band
Mizusawa, Iriki, Ogasawara, Ishigaki, Takahagi - 6.7-GHz Band
Mizusawa, Iriki, Ogasawara, Ishigaki, Usuda, Hitachi, Yamaguchi - Recording
- Polarization
OCTAD recording mode at 2048 Mbps bitrate is basecally used.
Polarization observations with the JVN are not currently carried out.
Antenna Specifications
- Listed system temperatures are all typical values.
| Antenna | Diameter [m] |
Tsys[K] | SEFD[Jy] | Location[m] | 6.7GHz | 8GHz | 22GHz | 6.7GHz | 8GHz | 22GHz | X | Y | Z |
| Mizusawa NAOJ |
20 | 130 | - | 100 | 2300 | 2500 | 1757 | -3857244.219 | 3108783.296 | 4003899.343 |
| Iriki NAOJ |
20 | 130 | - | 100 | 2300 | - | 1757 | -3521719.569 | 4132174.753 | 3336994.326 |
| Ogasawara NAOJ |
20 | 130 | - | 100 | 2300 | 2500 | 1757 | -4491068.894 | 3481544.830 | 2887399.623 |
| Ishigaki NAOJ |
20 | 130 | - | 100 | 2300 | 2500 | 1757 | -3263994.648 | 4808056.359 | 2619949.394 |
| Usuda JAXA |
64 | 80 | 30 | - | 137 | 52 | - | -3855355.681 | 3427427.292 | 3740971.179 |
| Gifu Gifu Univ. |
11 | - | - | 100 | - | - | 5811 | -3787123.372 | 3564181.686 | 3680274.967 |
| Hitachi Ibaraki Univ. |
32 | 35 | 35 | 100 | 200 | 200 | 1300 | -3961788.974 | 3243597.492 | 3790597.692 |
| Takahagi Ibaraki Univ. |
32 | 35 | 35 | 100 | 200 | 200 | 1300 | -3961881.825 | 3243372.480 | 3790687.449 |
| Yamaguchi NAOJ |
32 | 50 | 50 | - | 290 | 290 | - | -3502544.587 | 3950966.235 | 3566381.192 |
Baseline lengths and Sensitivities
8-GHz Baselines and senstivities
| Miz | Iri | Oga | Ishi | Usu | Hit | Tak | Gif | Yam | ||
| Miz | 1266754 | 1336883 | 2270417 | 413121 | 273134 | 272988 | - | 1013165 | Baseline Length [m] |
|
| Iri | - | 1251037 | 1018524 | 878168 | 1090407 | 1090665 | - | 292955 | ||
| Oga | 32.8 | - | 1826711 | 1065666 | 1073556 | 1073636 | - | 1287848 | ||
| Ish | 32.8 | - | 32.8 | 1874175 | 2074817 | 2075069 | - | 1298939 | ||
| Usu | 4.7 | - | 4.7 | 4.7 | 218138 | 218393 | - | 655019 | ||
| Hit | 9.3 | - | 9.3 | 9.3 | 1.3 | 259 | - | 872668 | ||
| Tak | 9.3 | - | 9.3 | 9.3 | 1.3 | 2.6 | - | 872922 | ||
| Gif | - | - | - | - | - | - | - | 493517 | ||
| Yam | 11.1 | - | 11.1 | 11.1 | 1.6 | 3.1 | 3.1 | - | ||
| 7-Sigma Sensitivity at 8-GHz band, with 512-MHz bandwidth and 6-min integration [mJy] | ||||||||||
22-GHz Baselines and senstivities
| Miz | Iri | Oga | Ish | Usu | Hit | Tak | Gif | Yam | ||
| Miz | 39.9 | 39.9 | 39.9 | - | - | 34.3 | - | - |
7-sigma sensitivity at 22-GHz band with 512-MHz bandwith and 6-min integration [mJy] |
|
| Iriki | 7.4 | 39.9 | 39.9 | - | - | 34.3 | - | - | ||
| Oga | 7.4 | 7.4 | 39.9 | - | - | 34.3 | - | - | ||
| Ishi | 7.4 | 7.4 | 7.4 | - | - | 34.3 | - | - | ||
| Usu | - | - | - | - | - | - | - | - | ||
| Hit | - | - | - | - | - | - | - | - | ||
| Tak | 6.3 | 6.3 | 6.3 | 6.3 | - | - | - | - | ||
| Gif | - | - | - | - | - | - | - | - | ||
| Yam | - | - | - | - | - | - | - | - | ||
| 7-sigma sensitivity at 22-GHz band, with 15-kHz bandwidth and 2-min integration [mJy] | ||||||||||
6.7-GHz Baselines and senstivities
| Miz | Iriki | Oga | Ish | Usu | Hit | Tak | Gif | Yam | ||
| Miz | 30.1 | 30.1 | 30.1 | 7.4 | 8.9 | - | - | 9.5 |
7-sigma sensitivity at 6.7-GHz band with 512-MHz bandwith and 6-min integration [mJy] |
|
| Iri | 21.6 | 30.1 | 30.1 | 7.4 | 8.9 | - | - | 9.5 | ||
| Oga | 21.6 | 21.6 | 30.1 | 7.4 | 8.9 | - | - | 9.5 | ||
| Ish | 21.6 | 21.6 | 21.6 | 7.4 | 8.9 | - | - | 9.5 | ||
| Usu | 5.3 | 5.3 | 5.3 | 5.3 | 2.2 | - | - | 2.3 | ||
| Hit | 6.4 | 6.4 | 6.4 | 6.4 | 1.6 | - | - | 2.8 | ||
| Tak | - | - | - | - | - | - | - | - | ||
| Gif | - | - | - | - | - | - | - | - | ||
| Yam | 7.6 | 7.6 | 7.6 | 7.6 | 1.9 | 2.0 | - | - | ||
| 7-sigma sensitivity at 6.7-GHz band, with 1-kHz bandwidth and 6-min integration [Jy] | ||||||||||
Image Sensitivities
| Frequency Band | Bandwidth |
Rms level with 1-hr integration [mJy/beam] |
| 6.7 GHz Band | 512 MHz | 0.063 |
| 1 kHz | 45 | |
| 8 GHz Band | 512 MHz | 0.037 |
| 22 GHz Band | 512 MHz | 0.21 |
| 15 kHz | 39 |