Pith Number

pith:SOQ3Y7EI

pith:2006:SOQ3Y7EIJJOMCSONBTRYSANOHR

not attested not anchored not stored refs pending

The Intrinsic Size of Sagittarius A* from 0.35 cm to 6 cm

Donald C. Backer, Geoffrey C. Bower, Heino Falcke, W.M. Goss, Yoram Lithwick

arxiv:astro-ph/0608004 v1 · 2006-07-31 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SOQ3Y7EIJJOMCSONBTRYSANOHR}

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	2026-05-18T04:28:58.152686Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93a1bc7c884a5cc149cd0ce38901ae3c7d97857e39c4ac4d248fdab689683e1e

Aliases

arxiv: astro-ph/0608004 · arxiv_version: astro-ph/0608004v1 · doi: 10.48550/arxiv.astro-ph/0608004 · pith_short_12: SOQ3Y7EIJJOM · pith_short_16: SOQ3Y7EIJJOMCSON · pith_short_8: SOQ3Y7EI

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/SOQ3Y7EIJJOMCSONBTRYSANOHR \
  | 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: 93a1bc7c884a5cc149cd0ce38901ae3c7d97857e39c4ac4d248fdab689683e1e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26f1f6093fbcb70e08d9beb65f00fdf941f5f0e164bce3cdd18721639ce398aa",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-07-31T20:45:45Z",
    "title_canon_sha256": "e78afa3148605d3e46fe8a72c97ba5a265f38ab27c39303b6cd388ca8e655782"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0608004",
    "kind": "arxiv",
    "version": 1
  }
}