Last Update: 1st Aug 2021

Proposal Information



Call for Proposals

The National Astronomical Observatory of Japan invites proposals for the Nobeyama 45-m telescope.

The Nobeyama 45-m telescope is operated by the National Astronomical Observatory of Japan (NAOJ) for centimetre to millimetre wavelengths. In this call for observing proposals, we offer four-beam spectroscopy observations in 80-116 GHz bands and single-beam spectroscopy observations in 20-116 GHz bands.

Ken'ichi Tatematsu
Director, Nobeyama Radio Observatory, National Astronomical Observatory of Japan

Information on the 2021-2022 Observing Season

1400 hours (including Guaranteed Time Observations and supplemental time) are expected to be available for open-use observations. Astronomers and researchers in the related fields (including graduate students) are encouraged to submit proposals. Besides, undergraduate students who are already admitted to graduate school can also submit proposals. We only accept proposals written in English.

Applicants are required to refer carefully to the instruction on this web page, Status Report, and A Guide for Preparation and Submission via Web.

For semester 2021, we accept proposals for Regular Program and Guaranteed Time Observation (GTO) Program. We offer one deadline for this observing season.

Semester Category Submission Deadline Observing Period
Semester 2021 Regular Program Wednesday 1st September 2021, 15:00JST [06:00UT] Wednesday 1st December 2021 -- Thursday 31st March 2022
Guaranteed Time Observations

Note:This is the last call for free-of-charge open-use observing proposals. In JFY2022, we will introduce the telescope time charging.

1. Open-Use Period
From 1st December 2021 to 31st March 2022
2. Observing Categories

There are two observing categories available for the Nobeyama 45-m telescope.

Regular Programs:
Regular Program is a program requiring an observing time of less than 200 hours for this semester.

Guaranteed Time Observations (GTO):
This program is offered for
- members of the development groups of Nobeyama Development Proposal for the 45-m Telescope whose deliverable passes the acceptance review as the open-use instrument,
- those who contribute to commissioning, management, performance improvement, or optimization of the Nobeyama 45-m telescope.
The total observing time for GTO programs is less than 140 hours in this semester. Note that we are not accepting new Nobeyama Development Proposals.

Note that VLBI observation proposals including the Nobeyama 45-m telescope should be submitted to Mizusawa VLBI Observatory, NAOJ. Details can be obtained at Mizusawa VLBI Observatory and VERA (VLBI Exploration of Radio Astronomy).

Also note that Target of Opportunity (ToO) proposals to observe targets that can be anticipated but not specified timing of the event, should be submitted as a Regular Program by the deadline. While the target list may be left unspecified, observing modes and sensitivity requests must be specified in detail for ToO observations. The proposal must include the following information:

  1. The number of triggers needed to reach the science goals of the proposal
  2. What triggers the actual observation to be performed
  3. The maximum response time for scheduling the observation after it is triggered.
A trigger must be sent via the Helpdesk.

3. Deadline

Semester 2021 (Regular and GTO programs):
1st September 2021, 15:00JST [06:00UT]

4. Facility Receivers

H22, H40, Z45, T70, and FOREST receivers are available for open use. We do not offer the continuum mode for science target observation in open use. The continuum mode is only available for pointing observations.

5. Observational Support

We offer the observation support by observatory staff remotely from Nobeyama only during the staff business hours of 9:00-17:00 JST, Monday through Friday (including national holidays). The assistant conducts the troubleshooting only. The users should tune the receiver by themselves.

If you are novice observers of the Nobeyama 45-m radio telescope or need the support by the observatory staff in the daytime, please request "the daytime observation" in the proposal submission form. Otherwise, we will allocate your observation also in the night-time. Note that the object at LST from 5 to 14 hour cannot be observed in the "daytime" during the semester 2021.

6. Observing Sites

All observations are basically carried out through remote observations from NAOJ Mitaka, Academia Sinica Institute of Astronomy and Astrophysics (ASIAA) in Taiwan, Korea Astronomy and Space Science Institute (KASI) in Korea, and universities/institutes in Japan*. We will allow new remote sites only in Japan. A preliminary test is needed before your observation even for the sites that are already estabilshed as remote operation sites. We will not prepare a new remote site for your observations outside Japan.

*: The remote operation sites established in Japan are as follows:

Requested hours of all submitted proposals vs Allocated hours for accepted proposals at each LST: A sum of Regular Program and Large Program for the 2020-2021 observing season. If you click the figure below, you can see a larger image.


LST Pressure

Important Notice about the 2021-2022 Observing Season

Important notice about the 2021-2022 season is summarised as follows:

Call for Proposals We place only one call for proposals.
Observing Days Observations will be assigned from Monday morning (∼9:00 JST) to Saturday morning (∼9:00 JST), including national holidays. We offer no open-use observations at year-end and New Year Holidays.
LST Allocation Allocation will be made in units of eight hours, and the allocation time will include the overhead time when the target source is not observable. We have six observing slots: LST = 2:00-10:00, 10:00-18:00, 18:00-2:00, and 6:00-14:00, 14:00-22:00, 22:00-6:00.
Observing Categories We only accept Regular Program and GTO Program.
Continuum Mode We do not offer the continuum mode for science target observation in open use. The continuum mode is only available for pointing observations.
Remote Observation The primary observing mode is remote operation. Observers are expected to be carried out through remote observations from NAOJ Mitaka, ASIAA in Taiwan, KASI in Korea and universities/institutes in Japan. A preliminary test is needed before your observation. We offer no service observation.
Travel Support There is no travel support for open-use observations.
Time Estimator The time estimation with one optical depth τ throughout the season.
Observational Support for the Open Use We offer the observation support by observatory staff remotely from Nobeyama only during the staff business hours of 9:00-17:00 JST, Monday through Friday (including national holidays). The assistant conducts the troubleshooting only. The users should tune the receiver by themselves.
Request for Daytime Observation If you are novice observers using the Nobeyama 45-m radio telescope or need the support by the observatory staff in the daytime, please request "the daytime observation" in the proposal submission form. Otherwise, we will allocate your observation also in the night-time. Note that the object at LST from 5 to 14 hour cannot be observed in the "daytime" during the semester 2021.

Other Notice for Applicants

Helpdesk Nobeyama Radio Observatory (NRO) offers Helpdesk support. Requests and questions about the open use of the Nobeyama 45-m telescope can be available through the Helpdesk. A trigger of Target of Opportunity observations should be sent to the Helpdesk.
Web Submission We accept the proposal only via web submission form. If you face any difficulty in the web submission, please contact us through the Helpdesk.
Support for New Users The NRO staff offers support for observers who are not familiar with observations using the Nobeyama 45-m telescope. We can assign Support Scientist to novice teams if needed. Please contact us via the Helpdesk for questions on proposal preparation, observing techniques and strategies, observation scripts, and data analysis.
H22 and H40 Receivers Simultaneous observation of H22 and H40 is offered. We note that system temperature will be slightly higher in the simultaneous observation. Please refer to the status report (Table 1).
ToO Observation Please note that you should submit a proposal for Regular Programs for studies of expected ToO (Target of Opportunity) objects such as comets, gamma-ray bursts, and extragalactic supernovae. The ToO trigger should be sent to the Helpdesk.
Dump time for On-The-Fly mode Dump time for On-The-Fly mode is allowed to be not only 0.1 second but 0.04 second as well. However, there is a limit on the size of the map when using 0.04 second (30 arcmin. ≤ size ≤ 60 arcmin.). Please justify the reason why you need to be observed in 0.04 second in the proposal.
Beam Rotation Angle Inclined-scan mapping from the reference coordinate is NOT allowed for observations with the FOREST receiver. For instance, users can only choose the beam rotation angle of -180, -90, 0, 90, and 180 degrees.
On-On Observation For the On-On observation, applicants can use Beam 1 and Beam 3 of FOREST receiver (beam separation is ∼70 arcsec) instead of the decommissioned TZ receiver.
Proprietary Period By default, data obtained as part of the Nobeyama 45-m science program are subject to a proprietary period of 18 months starting when all the observations of each project are complete.
Change Request Major change requests are defined as 1) adding new sources, 2) changing observing lines, and 3) changing mapping areas from the original proposals. Change requests are made through the Helpdesk. After contact with the Helpdesk, an observer must submit a paper in which reasons are described within 1 page of A4. The paper must include a clear description of the proposed change, along with a clear, substantive justification for the change. The requests will be evaluated by the Time Allocation Committee (TAC) chair and the observatory director and will be approved only if they are fully justified. Change requests duplicating against current NRO proposals will not be approved.
Effect by Automotive Millimetre-Wave Radar Automotive millimetre-wave radar mounted on the car may cause unwanted signals at 76-77 GHz. The observatory suggests users avoid RF setting around 76--77 GHz if possible. Following pdf files represent the results of test observations of receiving automotive millimetre-wave radar emitted from different types of cars: link1 link2
Re-allocation Cancelled observing time due to unexpected instrumentation/telescope failure will be re-allocated. Regarding the top-ranked proposals, the observatory intends to compensate as much as possible so that scientific goals can be achieved.
Cooperative Observation The observatory encourages applicants to study based on observations with the 45-m telescope and the ASTE Telescope and/or the James Clerk Maxwell Telescope (JCMT).
Development Proposals We determine not to place a call for new proposals for Development for Nobeyama 45-m Telescope. Programs that were "accepted" or "accepted with limited opportunities" can be continued (see above URL). However, the observatory support should be minimized in the current situation. The observatory clearly sets its priority on the open-use operation and dedicated operation.
NRO's policy NRO's Policy to Exclude Military Researches from the Open Use of the Observing Facilities

Preparation and Submission

Proposal Preparation Guide: Submission Instructions: Proposal Submission Form

Instrumentation Overview

Instrumentation overview of the Nobeyama 45-m telescope is summarised in the following links:

If Your Proposal is Approved

If your proposal is approved, PI (a delegate) needs to send an observing plan. Observers who will visit Mitaka can make a reservation for lodging by an e-mail. The observatory will NOT support travel expenses. We offer no service observation.

Instructions for Observers (written in English): Instructions for Observers (written in Japanese):

A computer account is necessary for your observations. Information on the account will be sent to the principal investigator (or the contact person).

Helpdesk

If you have any questions or requests about the open use of the Nobeyama 45-m telescope, please send it to the Helpdesk.
2021-08-01 Last Update