Pith Number

pith:GR3DUNB7

pith:2025:GR3DUNB7VBETYIXSP7ZVEGV66G

not attested not anchored not stored refs pending

The radial variation of the silicate-to-carbon ratio in M31 probed by PRIMA

Angelos Nersesian, Emmanuel Xilouris, Fr\'ed\'eric Galliano, Ilse De Looze, Jacopo Fritz, J\'er\'emy Chastenet, Laure Ciesla, Maarten Baes, Matthew W. L. Smith, Monica Rela\~no, Simone Bianchi, Stefan van der Giessen, Stephen Eales, Suzanne C. Madden, Viviana Casasola

arxiv:2509.01990 v1 · 2025-09-02 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GR3DUNB7VBETYIXSP7ZVEGV66G}

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	2026-07-05T12:03:12.384394Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

34763a343fa8493c22f27ff3521abef19875c54d66ab0293c0d526528f7b8090

Aliases

arxiv: 2509.01990 · arxiv_version: 2509.01990v1 · doi: 10.48550/arxiv.2509.01990 · pith_short_12: GR3DUNB7VBET · pith_short_16: GR3DUNB7VBETYIXS · pith_short_8: GR3DUNB7

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/GR3DUNB7VBETYIXSP7ZVEGV66G \
  | 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: 34763a343fa8493c22f27ff3521abef19875c54d66ab0293c0d526528f7b8090

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29c44204b5b6f437a8ca090c692eba12aa977c04f1ef38381fa88bbb12195d54",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-09-02T06:15:37Z",
    "title_canon_sha256": "6b67b44e1a66d93c9c9c5a5d931a229bf635b303428c89ab6c8c8f1efbd8f3c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2509.01990",
    "kind": "arxiv",
    "version": 1
  }
}