Pith Number

pith:IZPQVBDR

pith:2026:IZPQVBDRLJYS2R3VHASLWNXF6G

not attested not anchored not stored refs pending

Expanding the SPISEA Stellar Population Synthesis Software to the Substellar Regime

Caitlin Begbie, Jessica Lu, Katarzyna Kruszynska, Macy Huston, Matthew Hosek Jr., Natasha Abrams, Rachel Street

arxiv:2607.14292 v1 · 2026-07-15 · astro-ph.IM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IZPQVBDRLJYS2R3VHASLWNXF6G}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-17T00:21:03.627274Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

465f0a84715a712d47753824bb36e5f198b50279881ca933f877a213acac2d1c

Aliases

arxiv: 2607.14292 · arxiv_version: 2607.14292v1 · doi: 10.48550/arxiv.2607.14292 · pith_short_12: IZPQVBDRLJYS · pith_short_16: IZPQVBDRLJYS2R3V · pith_short_8: IZPQVBDR

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/IZPQVBDRLJYS2R3VHASLWNXF6G \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 465f0a84715a712d47753824bb36e5f198b50279881ca933f877a213acac2d1c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3786874e9ad9e1f99494a0cd699a646f5e7fa3f41d6aaf5862e75776d79bc755",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2026-07-15T18:55:49Z",
    "title_canon_sha256": "757ff7d0a57cf45ca982c3bff65208287d95a89edd28640c380ae8a77b3a7e8e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.14292",
    "kind": "arxiv",
    "version": 1
  }
}