Pith Number

pith:O66DHB2P

pith:2020:O66DHB2PGQ6JLEEMF2DDW2COE4

not attested not anchored not stored refs pending

A flare in the optical spotted in the changing-look Seyfert NGC 3516

A.A. Belinski, A. Kovacevic, A.M. Tatarnikov, A.V. Dodin, D. Ilic, E.O. Mishin, L.C. Popovic, M.A. Burlak, N.I. Shatsky, N.P. Ikonnikova, N. Rakic, N.V. Metlova, S.A. Potanin, S.G. Zheltoukhov, S. Marceta-Mandic, S.S. Tsygankov, V. Oknyansky

arxiv:2004.01308 v2 · 2020-04-02 · 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{O66DHB2PGQ6JLEEMF2DDW2COE4}

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	2026-07-05T01:15:15.616056Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

77bc33874f343c95908c2e863b684e27207d9a6d3313ef90451a2a3281b3bc22

Aliases

arxiv: 2004.01308 · arxiv_version: 2004.01308v2 · doi: 10.48550/arxiv.2004.01308 · pith_short_12: O66DHB2PGQ6J · pith_short_16: O66DHB2PGQ6JLEEM · pith_short_8: O66DHB2P

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/O66DHB2PGQ6JLEEMF2DDW2COE4 \
  | 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: 77bc33874f343c95908c2e863b684e27207d9a6d3313ef90451a2a3281b3bc22

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bfd4877bb47210c1f2315061fcc55f7cd5b2c451f6a9fcf81a3dba5d8dfc388d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-04-02T23:55:36Z",
    "title_canon_sha256": "a588acb6fc9789130898455380a7c41b1fa5495c7312e9021d13e88fde7b1790"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.01308",
    "kind": "arxiv",
    "version": 2
  }
}