Pith Number

pith:F7EU4CID

pith:2011:F7EU4CIDZGKU2KSTBXHX7A3SJF

not attested not anchored not stored refs pending

The Sagittarius impact as an architect of spirality and outer rings in the Milky Way

Chris W. Purcell, Erik Tollerud, James S. Bullock, Miguel Rocha, Sukanya Chakrabarti

arxiv:1109.2918 v1 · 2011-09-13 · astro-ph.GA · 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{F7EU4CIDZGKU2KSTBXHX7A3SJF}

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	2026-05-18T04:13:06.711402Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2fc94e0903c9954d2a530dcf7f83724955c62d89cdb7afe63cd0047afd986eec

Aliases

arxiv: 1109.2918 · arxiv_version: 1109.2918v1 · doi: 10.48550/arxiv.1109.2918 · pith_short_12: F7EU4CIDZGKU · pith_short_16: F7EU4CIDZGKU2KST · pith_short_8: F7EU4CID

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/F7EU4CIDZGKU2KSTBXHX7A3SJF \
  | 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: 2fc94e0903c9954d2a530dcf7f83724955c62d89cdb7afe63cd0047afd986eec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c790d4c1fdb8f456c8c8e87a86b48c82357797251187f2a97852844935a77d6",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2011-09-13T20:44:42Z",
    "title_canon_sha256": "a0e18507eeadbe22e43acaa14ae1534d5c07e52f05929d7992a255f69acd2234"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.2918",
    "kind": "arxiv",
    "version": 1
  }
}