Pith Number

pith:UMGYESKR

pith:2021:UMGYESKRJMUXTSVUB6TSNHCMP6

not attested not anchored not stored refs pending

The Eddington ratio-dependent changing look events in NGC 2992

Andrew Robinson, Bradley M. Peterson, Daniel Ruschel-Dutra, Dirk Grupe, Jaderson Schimoia, Muryel Guolo, Rodrigo Nemmen, Thaisa Storchi-Bergmann

arxiv:2109.06914 v1 · 2021-09-14 · 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{UMGYESKRJMUXTSVUB6TSNHCMP6}

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	2026-07-05T03:16:25.857787Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a30d8249514b2979cab40fa7269c4c7fb5cd20a3cd2db6c7b13f4becf0156268

Aliases

arxiv: 2109.06914 · arxiv_version: 2109.06914v1 · doi: 10.48550/arxiv.2109.06914 · pith_short_12: UMGYESKRJMUX · pith_short_16: UMGYESKRJMUXTSVU · pith_short_8: UMGYESKR

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/UMGYESKRJMUXTSVUB6TSNHCMP6 \
  | 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: a30d8249514b2979cab40fa7269c4c7fb5cd20a3cd2db6c7b13f4becf0156268

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5eb1107191929fa994982379d5263c5dd8fc802727e1e14ba9aa88ea2f4c85ee",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-09-14T18:23:02Z",
    "title_canon_sha256": "75221066a7972cf0904e6ccddfebf69099a9b789b9975e41cbcfc143e54aa1d8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.06914",
    "kind": "arxiv",
    "version": 1
  }
}