Pith Number

pith:FYCQ52KZ

pith:2009:FYCQ52KZX56XQIA5C5IQCKPJ2N

not attested not anchored not stored refs pending

VLT optical observations of the isolated neutron star RX J0420.0-5022

A. Schwope (Astrophysikalisches Institut Potsdam), C. Motch (CNRS, F. Haberl (MPE), Observatoire Astronomique), R. P. Mignani (UCL-MSSL), R. Turolla (University of Padua), S. Zane (UCL-MSSL), Universite' de Strasbourg

arxiv:0906.5480 v1 · 2009-06-30 · 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{FYCQ52KZX56XQIA5C5IQCKPJ2N}

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	2026-05-18T02:13:11.785121Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2e050ee959bf7d78201d17510129e9d35312ad87359cd621adf0c904db185c6b

Aliases

arxiv: 0906.5480 · arxiv_version: 0906.5480v1 · doi: 10.48550/arxiv.0906.5480 · pith_short_12: FYCQ52KZX56X · pith_short_16: FYCQ52KZX56XQIA5 · pith_short_8: FYCQ52KZ

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/FYCQ52KZX56XQIA5C5IQCKPJ2N \
  | 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: 2e050ee959bf7d78201d17510129e9d35312ad87359cd621adf0c904db185c6b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fb9c3db059cd970678865d01871a282cfc869df36903cc1ac60a690fe0aab968",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-06-30T11:14:17Z",
    "title_canon_sha256": "affb9414374d581d103a7fe0e5fe2e5207561967d3870dc56d0692ef7f3214e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.5480",
    "kind": "arxiv",
    "version": 1
  }
}