From: Edwards, Phil (CASS, Marsfield) <"Edwards,>
Date: Fri, 23 Oct 2020 04:36:13 +0000

Dear colleagues,

This is a reminder that the proposal submission deadline for the East
Asian VLBI Network (EAVN) is approaching to November 2, 8:00 UT. Please
refer to the following EAVN website for more details about the array.

https://eavn.kasi.re.kr/

Part of descriptions in the EAVN status report were revised, thus please
refer also to the latest version of the status report via the EAVN
website before submitting your proposal.

Best regards,

Tomoya Hirota
(NAOJ; in place of EAVN directors)



===================================

***************************************************
Call for Proposals for the East Asian VLBI Network (EAVN) for the 2021A
semester
Proposal submission deadline: 2020 November 2 (Mon.), 8:00 UT
EAVN website: https://eavn.kasi.re.kr/
***************************************************

--- Major revisions from the 2020B semester ---
* EAVN will be operated using 14 telescopes (VERA, KVN, Tianma, Sheshan,
Nanshan, Nobeyama, Takahagi, Hitachi, and Yamaguchi). Availability of
VERA's antenna will depend on the financial situation in the fiscal year
2021.
* C-band (6.7 GHz) observation mode is newly opened.
-----------------------------------------------


*** Overview ***
We invite proposals for open-use observations with the East Asian VLBI
Network (EAVN), which is the international collaborative VLBI array
between China, Korea, and Japan. In the 2021A semester, 14 telescopes
(VERA 4 x 20 m, KVN 3 x 21 m, Tianma 65 m, Sheshan 25 m, Nanshan 26 m,
Nobeyama 45 m, Takahagi 32 m, Hitach 32 m, and Yamaguchi 32 m)
participate in the EAVN open-use program.


*** Observing mode ***
EAVN provides an opportunity of a VLBI observation with a data recording
rate of 1 Gbps (total bandwidth of 256 MHz and with single polarization
at 6.7, 22, and 43 GHz. Dual-frequency (22 and 43 GHz) simultaneous
observation system can be used for EAVN observations at KaVA and
Nobeyama, while the session will be set in which the system is
available. Details of available observing mode can be found in the EAVN
Status Report on the EAVN website.


*** Telescope time and array configuration ***
The total available observation time for EAVN is up to 500 hours in the
2021A semester, while the available observing time for individual EAVN
telescopes are different. All EAVN observations will be allocated
between 2021 January 16 and June 15. Please refer to the EAVN status
report on the EAVN website for more details.

EAVN accepts a request for usage of sub-array configuration (KaVA 7
telescopes and additional telescopes from non-KaVA stations). There are
several conditions of the antenna combination depending on the observing
frequency. Further details about the sub-array configuration are shown
in the EAVN status report.

The maximum request time for a single EAVN proposal is limited to 100
hours in case of usage of only KaVA, while one can request for the
maximum total observation time of 36 hours for non-KaVA telescopes
(except Nobeyama) for a single proposal, and that of 24 hours for
Nobeyama. Proposers can request their project to be allocated over a
year until the end of the 2021B semester (2022 January 15), while the
total request time of the proposal is still limited as shown above.


*** Target of opportunity ***
EAVN accepts target of opportunity (ToO) proposals. Note that Nobeyama
cannot be included for ToO proposals. It is strongly recommended that
ToO proposals (especially expected ToO) are submitted during the regular
CfP, while unexpected or urgent ToO can be submitted as Director's
Discretionary Time (DDT) proposals at any time. ToO proposals must
include clear triggering criteria to initiate an observation. ToOs are
valid for one year after it is approved. ToO proposals for DDT should
follow the same way of regular call and should be submitted via the EAVN
website.


*** Proposal submission ***
Proposals should be submitted via EAVN website. Proposal submission
deadline is 2020 November 2 (Mon.), 8:00 UT. Please refer to the EAVN
status report for detailed information about the proposal format. The
designated cover sheet form can be downloaded from the EAVN websites.


*** Acknowledgment ***
All EAVN users are asked to specify the acknowledgment to EAVN in their
publications. A template for the acknowledgment can be found in the EAVN
status report.


Sincerely,

Mareki Honma
Director of Mizusawa VLBI Observatory, NAOJ

Kee-Tae Kim
Director of Radio Astronomy Division, KASI

Zhi-Qiang Shen
Director of Shanghai Astronomical Observatory, CAS

and
Na Wang
Director of Xinjiang Astronomical Observatory, CAS
Received on 2020-10-23 15:36:19