Pith Number

pith:T4OXCSD2

pith:2020:T4OXCSD27IUQCWFDPCAARS7LPU

not attested not anchored not stored refs pending

An upper limit on the spin of SgrA$^*$ based on stellar orbits in its vicinity

Abraham Loeb, Giacomo Fragione

arxiv:2008.11734 v2 · 2020-08-26 · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T4OXCSD27IUQCWFDPCAARS7LPU}

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	2026-07-05T01:40:42.638516Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f1d71487afa290158a3788008cbeb7d2ca98f1f785d6fa899051777b922209e

Aliases

arxiv: 2008.11734 · arxiv_version: 2008.11734v2 · doi: 10.48550/arxiv.2008.11734 · pith_short_12: T4OXCSD27IUQ · pith_short_16: T4OXCSD27IUQCWFD · pith_short_8: T4OXCSD2

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/T4OXCSD27IUQCWFDPCAARS7LPU \
  | 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: 9f1d71487afa290158a3788008cbeb7d2ca98f1f785d6fa899051777b922209e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0984ccf6a39e43d9e4c253577fd9bd273217af1166872fde318c762b056bc149",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-08-26T18:00:02Z",
    "title_canon_sha256": "1950dc843bce7b5ac62a9bc06f235a7abdffd9fcbd6e697e6634b3da1fb4d3ab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2008.11734",
    "kind": "arxiv",
    "version": 2
  }
}