Pith Number

pith:GVEZJHJJ

pith:2012:GVEZJHJJKF5SR37INOAE3ZDCUH

not attested not anchored not stored refs pending

Discovery of an Halpha emitting disk around the supermassive black hole of M31

J. E. Steiner, R. B. Menezes, T. V. Ricci

arxiv:1212.5640 v1 · 2012-12-22 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GVEZJHJJKF5SR37INOAE3ZDCUH}

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	2026-05-18T03:37:51.913070Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3549949d29517b28efe86b804de462a1dbe3dd5773ec3a53900aed007bfa1e85

Aliases

arxiv: 1212.5640 · arxiv_version: 1212.5640v1 · doi: 10.48550/arxiv.1212.5640 · pith_short_12: GVEZJHJJKF5S · pith_short_16: GVEZJHJJKF5SR37I · pith_short_8: GVEZJHJJ

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/GVEZJHJJKF5SR37INOAE3ZDCUH \
  | 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: 3549949d29517b28efe86b804de462a1dbe3dd5773ec3a53900aed007bfa1e85

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d256929095615ffd3d657d4871cd450eec6696f44a13d21ed42fdc44d6cb3930",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-12-22T01:01:54Z",
    "title_canon_sha256": "509c2b08d6c61d0602f240724096662df50a5b1760dc80f1ed6d77f50bd74e3e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.5640",
    "kind": "arxiv",
    "version": 1
  }
}