Collaboration Policies


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There are three types of members in the SOHRU collaboration:

(1) Builders: Builders are the members of the Council. Builders can recommend new Builders who deserve the status, and can be appointed through unanimous consent.

(2) Members: The Members should follow the collaboration policies and are listed elsewhere. The Internal collaborators (ICs) include the Builders and Members. Students supervised directly by ICs are considered as Members during the supervision of their hosts. Builders can recommend new Members who are not Builders, and new Members are appointed based on their proven or potential contribution to the collaboration through unanimous consent of Builders.

(3) External Collaborators (EC): The ECs refer to the researchers who do not fall under (1) and (2), but have access to at least some of the collaboration data under permission of the Council. The postdocs supervised by the ICs should have External Collaborator status.


(1) 1. Builders have the right to claim authorship in all submitted papers that use the resources solely produced for this collaboration, for the period specified below.

* From the beginning to the end of the collaboration or to the date of the public data release, whichever comes earlier.

(2) Members can freely propose and conduct research projects using the collaboration data.

(3) ECs may propose a new project using the collaboration data. In this case, ECs should submit research proposals to the Council to obtain an approval. There should be no conflict with ICs' extant projects.

Research Projects and Publication

(1) ICs can freely propose research projects and request participation in any project proposed by other members. If there are multiple research topics on a similar subject, the Council may coordinate and integrate them. If an IC's student wishes to use the collaboration data in his/her thesis, notification to the Council must be made in advance.

(2) For ECs, the project lead must submit an External Collaboration Status Request (ECSR) to the Council and obtain an approval. The main consideration in the qualification screening of ECs is whether or not they can conduct the research within a given period without conflicting with the existing research projects proposed by ICs. EC status is granted on a paper-by-paper basis.

All collaboration projects must be registered on the collaboration wiki website ( Each project proposal should contain a project title, a list of project members, and a brief abstract summarizing the scope of the work. The project proposal should be submitted as soon as a specific scientific investigation begins. The proposal will be sent to all ICs.

(3) The list of authorship is as follows;

a. IC projects

i. The project lead and contributing ICs (in the order determined by the project lead)

ii. Builders who do not belong to (i) but request authorship.

b. EC projects

i. The project lead and contributing participants (in the order determined by the project lead)

ii. Builders who do not belong to (i) but request authorship.

Collaboration Activites

The collaboration makes the following activities:

(1) a series of cosmological simulations yielding data for modeling high redshift Lyman alpha objects. One of the series is the recently finished Horizon Run 5 (HR5) simulation provided by the HR5 collaboration.

(2) a series of multi-object spectroscopic observations of nearby or high redshift objects.

(3) a series of observations of the high redshift universe using a set of narrow band filters, which includes but is not limited to the currently ongoing One-hundred-square-degree DECam Imaging in Narrowbands (ODIN) survey, and Lyman-alpha object related sciences.

The collaboration can form appropriate working groups to conduct collaboration activities.

Data Management

(1) The raw and reduced data of the imaging surveys are managed by PI, and/or ICs designated by the Council. All Builders can have a copy.

(2) The cosmological simulation data are managed by PI, and/or ICs designated by the Council. The first simulation data are provided to the collaboration by the separate HR5 collaboration, and a use of the HR5 data not posted in the collaboration wiki is subject to an approval of the HR5 Collaboration Council

(3) The collaboration data should be notified immediately to the ICs when they are produced.

Amendments to this Policy

When necessary, this Collaboration Policy can be amended by a consensus decision of the Council.

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