Pith Number

pith:EHFAQDHS

pith:2015:EHFAQDHSHQRR6IHCLXFUFQEDPW

not attested not anchored not stored refs pending

The Persistent Eruption of UGC~2773-OT: Finally, a Decade-Long Extragalactic Eta Carinae Analog

Alexei V. Filippenko, Jennifer E. Andrews, Jon C. Mauerhan, Melissa L. Graham, Nathan Smith, Peter Milne, Weikang Zheng

arxiv:1510.08050 v1 · 2015-10-27 · astro-ph.SR · 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{EHFAQDHSHQRR6IHCLXFUFQEDPW}

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	2026-05-18T01:24:51.218039Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21ca080cf23c231f20e25dcb42c0837d86ed2fd19f1f6d0d2f4a121c603ebe93

Aliases

arxiv: 1510.08050 · arxiv_version: 1510.08050v1 · doi: 10.48550/arxiv.1510.08050 · pith_short_12: EHFAQDHSHQRR · pith_short_16: EHFAQDHSHQRR6IHC · pith_short_8: EHFAQDHS

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/EHFAQDHSHQRR6IHCLXFUFQEDPW \
  | 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: 21ca080cf23c231f20e25dcb42c0837d86ed2fd19f1f6d0d2f4a121c603ebe93

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f584c79febafbf8090af92a5f37133f0e5483fc3ce3481996c7086f685b62227",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2015-10-27T19:59:57Z",
    "title_canon_sha256": "9f47e8f68c431b82a11b742f0062d28ad1fd6aae15fac2ec04e9c2681afad4e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.08050",
    "kind": "arxiv",
    "version": 1
  }
}