Pith Number

pith:NFJNOA3H

pith:2015:NFJNOA3HZFRFDJI5JJ24D27PBH

not attested not anchored not stored refs pending

A Spectroscopic Study of the Extreme Black Widow PSR J1311-3430

Alexei V. Filippenko, Roger W. Romani, S. Bradley Cenko

arxiv:1503.05247 v1 · 2015-03-17 · astro-ph.HE · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NFJNOA3HZFRFDJI5JJ24D27PBH}

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	2026-05-18T02:03:33.626594Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6952d70367c96251a51d4a75c1ebef09db75dfbdbd797dbbabde070aa59b6796

Aliases

arxiv: 1503.05247 · arxiv_version: 1503.05247v1 · doi: 10.48550/arxiv.1503.05247 · pith_short_12: NFJNOA3HZFRF · pith_short_16: NFJNOA3HZFRFDJI5 · pith_short_8: NFJNOA3H

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/NFJNOA3HZFRFDJI5JJ24D27PBH \
  | 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: 6952d70367c96251a51d4a75c1ebef09db75dfbdbd797dbbabde070aa59b6796

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d2548159e85f8c1c9796d845ee0ff3b47c3cde90d29f677d466a80d3baf928c7",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2015-03-17T23:35:56Z",
    "title_canon_sha256": "e6c7771960c94d1470c56b39e9660b52ffefeeb50df79f60343c46843299612a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.05247",
    "kind": "arxiv",
    "version": 1
  }
}