Pith Number

pith:WMORRNNA

pith:2009:WMORRNNAWF756SSB2KB2ZVOHMG

not attested not anchored not stored refs pending

Deep optical observations of the central X-ray source in the Puppis A supernova remnant

A. De Luca, P.A. Caraveo (INAF-Iasf), R. P. Mignani (MSSL-UCL), S. Mereghetti

arxiv:0904.4776 v1 · 2009-04-30 · astro-ph.HE · 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{WMORRNNAWF756SSB2KB2ZVOHMG}

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	2026-05-18T02:13:48.934285Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b31d18b5a0b17fdf4a41d283acd5c761a4dfaa3f1f1f09781591c2e4a3f2e43e

Aliases

arxiv: 0904.4776 · arxiv_version: 0904.4776v1 · doi: 10.48550/arxiv.0904.4776 · pith_short_12: WMORRNNAWF75 · pith_short_16: WMORRNNAWF756SSB · pith_short_8: WMORRNNA

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/WMORRNNAWF756SSB2KB2ZVOHMG \
  | 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: b31d18b5a0b17fdf4a41d283acd5c761a4dfaa3f1f1f09781591c2e4a3f2e43e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8bb646e95e80f5b7c89976fedf2b4c78d924c6b7b98a7a0bd3651fa3ed874de8",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-04-30T09:54:36Z",
    "title_canon_sha256": "fa2b5faf84ca4ca8f741cc766e1d433ff25f89639885601c7e852a5bce035fb7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4776",
    "kind": "arxiv",
    "version": 1
  }
}