Suggest Missing System

Step 2 — Submit missing system proposal

Required minimum fields: System Name, location (RA/Dec), reference, and explanation for why it is post-MT. Format all measurements as [err-, value, err+] (fill in positive value for the - error). Note that M2 is the presumed (past) donor star, while M1 is the accretor

System Name *

RA (deg) *

Dec (deg) *

Positional uncertainty (mas, optional)

RA/Dec as decimal degrees. The positional uncertainty is the 1-sigma on-sky error (semi-major axis of the error ellipse) in milliarcseconds — for reference, our duplicate-matching threshold is 100 mas.

Reference (ADS bibcode(s), comma-separated) *

Why this is post-MT *

System Parameters

Period [err-, value, err+] in days (optional)

Eccentricity [err-, value, err+] (optional)

M1 [err-, value, err+] in Msun (optional)

M2 [err-, value, err+] in Msun (optional)

system_class (optional)

Select the single class that best matches how the system is identified in the literature. If several apply, pick the primary identification and mention the alternatives in the "Why this is post-MT" field. If nothing fits, choose "Other / propose a new class" — new classes are welcome. Full definitions are given in the accompanying paper.

What do these classes mean?

WUMa binary — low-mass contact binary.
Massive contact binary — high-mass (OB) contact binary.
Algol — semi-detached binary (with mass-ratio reversal), Roche-lobe-filling donor.
Hot subdwarf binary — core/shell He-burning low-mass stripped star (sdB/sdO) with a companion.
He giant — giant-like low-mass stripped helium star with a companion.
Intermediate-M stripped star — stripped star of roughly 1.5 to 8 Msun.
WR binary — Wolf-Rayet star with a (massive O-type) companion.
Post-AGB binary — donor recently left the AGB/RGB and is contracting towards a WD; recently terminated mass transfer.
EL CVn — bloated pre-He-WD stripped star with (an early-type A/F MS) companion.
Blue straggler binary — rejuvenated mass gainer (blue/yellow straggler), typically with a WD companion.
Chemically Peculiar — barium / CEMP / Li-enhanced star polluted by a former AGB donor that is now a WD.
Astrometric WD + MS — WD companion to MS star inferred from an astrometric orbit (e.g. Gaia).
Spectroscopic WD + MS — WD companion to MS star found via radial velocities / spectroscopy.
Self-lensing WD + MS — WD companion to MS star revealed by self-lensing brightening pulses.
pulsar binary — radio pulsar with a non-degenerate companion.
Spectroscopic compact object — detached NS/BH candidate found via radial velocities.
Astrometric compact object — NS/BH candidate from astrometric (Gaia) orbits.
high-mass XRB — accreting NS/BH with a massive donor star.

obs_type_1 (optional)

obs_type_2 (optional)

evol_type_1 (optional)

evol_type_2 (optional)

Detection Method (comma-separated, optional)

Mass Function [err-, value, err+] in Msun (optional)

M1_sin3i [err-, value, err+] in Msun (optional)

M2_sin3i [err-, value, err+] in Msun (optional)

Quality flags (optional)

Flag any parameter above that is assumed, inferred, or not a direct dynamical measurement. Indirect (e.g. photometric or model-based) mass estimates are welcome in the M1/M2 fields — just flag them here so the catalog stays homogeneous.

assumed_e — eccentricity fixed a priori (e.g. e = 0 by construction in the modelling) assumed_M1 — M1 adopted or assumed rather than measured assumed_M2 — M2 adopted or assumed rather than measured assumed_q — mass ratio adopted or assumed rather than measured min_M2 — M2 is a lower limit (e.g. from the mass function) indirect_M1 — M1 not from orbital dynamics (photometric / SED / model-based; specify the method in Notes) indirect_M2 — M2 not from orbital dynamics (photometric / SED / model-based; specify the method in Notes)

Additional schema fields as JSON object (optional)

Keys and units must follow the data schema format: measurements are [err-, value, err+] triplets — masses in Msun, periods in days — written as plain numbers with "." as decimal separator. RA/Dec are plain scalars in deg, with pos_err_mas (positional uncertainty in mas) as a separate field. No unit strings (write [null, 0.22, null], not "0.22 Msun").

How submission works: the button below opens a pre-filled GitHub issue in a new tab — you only need to be signed in to GitHub (no fork, no git knowledge). Check the form and press Submit new issue. Our automation then validates the JSON and converts it into a pull request, and posts the link back on your issue. The pull request awaits review by the maintainers — no further action is needed from your side.

Batch submission — multiple systems at once

Prefer to add several systems in one go? Prepare a single JSON file (an array of system objects following the data schema) and submit it as one pull request. The validator below checks every entry and runs the duplicate check against the catalog for you.

1. Get the template

The template is a JSON array: the first entry is a fully filled example (delete it before submitting), the second is an empty skeleton — copy it once per system. All measurements are [err-, value, err+] triplets (masses in Msun, periods in days); RA/Dec are plain scalars in deg with the positional uncertainty in a separate pos_err_mas field (mas). Use null for anything unknown.

2. Validate your file

Upload your JSON file

… or paste the JSON array here

Prefer to do it fully programmatically?

You can skip this website entirely: fork the repository, add your JSON file to data/proposed_additions/, and open a pull request:

# one-time: fork and clone (or use the GitHub web UI)
gh repo fork binary-observations/post_mt_catalog --clone
cd post_mt_catalog

git checkout -b proposal-YYYY-MM-DD-my-systems
cp /path/to/my_systems.json data/proposed_additions/YYYY-MM-DD_my_systems.json
git add data/proposed_additions/
git commit -m "Propose missing post-MT systems"
git push origin HEAD
# then open a pull request on GitHub

Suggest a Missing Post-MT System

Step 1 — Check if system already exists in the catalog

Step 2 — Submit missing system proposal

System Parameters

Batch submission — multiple systems at once

1. Get the template

2. Validate your file

3. Submit