Pith Number

pith:OFQVHP4J

pith:2018:OFQVHP4JWH2MMUYZQ3SQZWO34L

not attested not anchored not stored refs pending

Discovery of Dying Active Galactic Nucleus in Arp 187: Experience of Drastic Luminosity Decline within $10^4$ years

Hyun-Jin Bae, Junko Ueda, Kenta Matsuoka, Kohei Ichikawa, Megumi Shidatsu, Taiki Kawamuro, Yoshiki Toba

arxiv:1811.07447 v1 · 2018-11-19 · 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{OFQVHP4JWH2MMUYZQ3SQZWO34L}

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	2026-05-17T23:56:16.887930Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

716153bf89b1f4c6531986e50cd9dbe2d2a685b5304e307a893b3c3421680dc2

Aliases

arxiv: 1811.07447 · arxiv_version: 1811.07447v1 · doi: 10.48550/arxiv.1811.07447 · pith_short_12: OFQVHP4JWH2M · pith_short_16: OFQVHP4JWH2MMUYZ · pith_short_8: OFQVHP4J

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/OFQVHP4JWH2MMUYZQ3SQZWO34L \
  | 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: 716153bf89b1f4c6531986e50cd9dbe2d2a685b5304e307a893b3c3421680dc2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25a7f50dd90e6a3909a949a697ae872fdc67e1cf9c76cb9c9ac524656d88dccc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-11-19T01:11:51Z",
    "title_canon_sha256": "1f8bf9e224b9a5e647b98e7d2e73e062c93ff143130523fca84dbe7872a54be0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.07447",
    "kind": "arxiv",
    "version": 1
  }
}