Pith Number

pith:3OXGCB7B

pith:2009:3OXGCB7B4V5UAEG3QUXKHLE33L

not attested not anchored not stored refs pending

X-ray Evolution of SNR 1987A: The Radial Expansion

David N. Burrows, Gordon P. Garmire, Judith L. Racusin, Richard McCray, Sangwook Park, Svetozar Zhekov

arxiv:0908.2097 v1 · 2009-08-14 · 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{3OXGCB7B4V5UAEG3QUXKHLE33L}

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	2026-05-18T02:12:34.170624Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dbae6107e1e57b4010db852ea3ac9bdafaeebe13099e77fa370fd3bda40f8fa7

Aliases

arxiv: 0908.2097 · arxiv_version: 0908.2097v1 · doi: 10.48550/arxiv.0908.2097 · pith_short_12: 3OXGCB7B4V5U · pith_short_16: 3OXGCB7B4V5UAEG3 · pith_short_8: 3OXGCB7B

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/3OXGCB7B4V5UAEG3QUXKHLE33L \
  | 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: dbae6107e1e57b4010db852ea3ac9bdafaeebe13099e77fa370fd3bda40f8fa7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8bdb286fbadcdf6a0425aa660e5d89e4d2e2e3c9fffe716ffce86c7d5192f892",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-08-14T17:00:54Z",
    "title_canon_sha256": "c5e752bf96b151ed61e4ee53eaceca61bf3af48fd4630c2c33bbca6eb6c92a68"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.2097",
    "kind": "arxiv",
    "version": 1
  }
}