HEAD 21 Meeting

Abstracts & Proposals

21st Meeting of the High Energy Astrophysics Division
Horseshoe Bay Resort, Horseshoe Bay, Texas
7 – 12 April 2024


Submit Late Abstracts

Rules & Regulations

  • Limit one (1) abstract submission per Presenter unless invited to speak in a Special Session or Plenary.
  • The abstract must be submitted through the online system.
  • Presenters must be listed as the first author of the paper.
  • The presenting/first author must register for the meeting. 
  • The presenting/first author must be registered for the meeting. 
    • On rare occasions, AAS/HEAD will consider exceptions to this rule in the case of a major illness or other emergencies. The first author should e-mail the Science Organizing Committee in advance of the presentation, explaining the situation and suggesting a backup presenter. 
  • Submission of an abstract indicates all authors agree to adhere to AAS/HEAD meeting policies and code of conduct  

Due to space constraints, if you request an oral, you are not guaranteed an oral slot. If your presentation is not selected as an oral presentation, your abstract will automatically be assigned to a poster presentation.

If you have not submitted a Regular abstract, you may submit one Late-breaking Poster abstract.

There is no limit to the number of abstracts that you may co-author. NOTE: The abstract body text can be a maximum of 2,250 characters (which includes letters, numbers, punctuation, and symbols/special characters). 

Types of Presentations

Plenary Presentations 

  • Prize Lectures 
  • Oral Invited Lectures 

Contributed Presentations 

  • Oral
  • Poster 

Presentations are generally arranged by topic. 

Types of Discussion Sessions 

All presenters are expected to participate in the asynchronous discussion via slack.  

Submission Process

Abstracts must be submitted through the presenting author's AAS record. Co-authors are not eligible to substitute as the presenting author. The presenting author will be notified once the schedule has been determined. 

Abstract Login Instructions 

To submit an abstract, you must first log into the system using your AAS Login. 

  • If you are a member of the AAS you should already have a login.  
  • If you are not a member of the AAS you may create an AAS Login if you do not already have one. 

Abstract Form Details 

The form contains instructions on the various steps required to complete a submission. 

  • The abstract must be complete and submitted by the deadline, 11:59 pm EDT, 21 November 2023
  • The abstract body text can be a maximum of 2,250 characters (which includes letters, numbers, punctuation, and symbols/special characters). 
  • To enter co-authors, you must have the following: full first and last name, e-mail address, and affiliation. 
  • You can continue to make changes to your abstract before the deadline. To edit an abstract, sign back in to find the abstract you submitted and make changes. Please remember to resubmit once you have made changes. 

Topical Categories

Categories are used as a guide for the Scientific Organizing Committee to build coherent sessions. The final session assignments and session titles are at the discretion of the Committee. 

  • AGN
  • Galaxy Clusters/Large Scale Structures
  • ISM/Galaxies
  • Mission and Instruments
  • Multi-messenger Astrophysics
  • Stellar/Compact Objects
  • Time-domain Astrophysics

Presentation Guidelines & Tips

All presenters must register for the full meeting. Both in-person and remote participation will be allowed.

Oral Presentations

In Person

  • Contributed Oral Presentations will be 15 minutes in length (typically 12 minutes for the presentation and 3 minutes for questions/transition to the next speaker).
  • You will be able to upload your slides onsite, technicians will be in the back of rooms for your convenience.


  • All presentations will be done using ZOOM.
  • Presenter links will be sent at a later date.
  • There is no need to upload your slides, you will be able to screenshare on ZOOM.

Poster Presentations

In Person

  • Posters must fit within a physical space of 4 feet by 4 feet if in person.
  • Posters must be uploaded for the program


  • Posters must be uploaded for viewing in the program, meeting app, and desktop view of the app.
  • Slack will be used for Q&A and discussions about your poster. Each session will have it's own channel.

Publication of Abstracts

  • Online Program of Abstracts — Available during the meeting; includes full abstract text. 
  • Astrophysics Data System (ADS) — Abstracts are sent to ADS and typically published shortly before the meeting.