Pith Number

pith:34HZHMWQ

pith:2017:34HZHMWQMSFT4GTGCAO7SBYUQ3

not attested not anchored not stored refs pending

Evolution of the accretion disk around the supermassive black hole of NGC 7213

C. Winge, J. S. Schimoia, M. Eracleous, R. S. Nemmen, T. Storchi-Bergmann

arxiv:1708.03727 v1 · 2017-08-11 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{34HZHMWQMSFT4GTGCAO7SBYUQ3}

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	2026-05-18T00:37:57.315494Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

df0f93b2d0648b3e1a66101df9071486c9852510ee19ddfd0d595e7c29db153c

Aliases

arxiv: 1708.03727 · arxiv_version: 1708.03727v1 · doi: 10.48550/arxiv.1708.03727 · pith_short_12: 34HZHMWQMSFT · pith_short_16: 34HZHMWQMSFT4GTG · pith_short_8: 34HZHMWQ

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/34HZHMWQMSFT4GTGCAO7SBYUQ3 \
  | 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: df0f93b2d0648b3e1a66101df9071486c9852510ee19ddfd0d595e7c29db153c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f25099e427a358b1a7d7d0c0abf17433e66d291ee57edccf8cdaadab539fbee",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2017-08-11T22:58:19Z",
    "title_canon_sha256": "75ff3627d26bd3a6c3b1c76a586ee707107a4dadeb346fac0ad15e3f7a54dfba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.03727",
    "kind": "arxiv",
    "version": 1
  }
}