Pith Number

pith:42C4D2JI

pith:2009:42C4D2JIDVAYGSZMEUTXJWTKHJ

not attested not anchored not stored refs pending

Chandra ACIS Survey of M33 (ChASeM33): The enigmatic X-ray emission from IC131

B. F. Williams, F. Haberl, K. D. Kuntz, K. S. Long, P. F. Winkler, P. P. Plucinsky, R. K. Smith, R. Tuellmann, T. G. Pannuti, T. J. Gaetz, W. P. Blair, W. Pietsch

arxiv:0910.5666 v1 · 2009-10-29 · astro-ph.HE

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

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	2026-05-18T02:34:12.496442Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e685c1e9281d41834b2c252774da6a3a670d46b326853b93074fdc697b6e2626

Aliases

arxiv: 0910.5666 · arxiv_version: 0910.5666v1 · doi: 10.48550/arxiv.0910.5666 · pith_short_12: 42C4D2JIDVAY · pith_short_16: 42C4D2JIDVAYGSZM · pith_short_8: 42C4D2JI

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/42C4D2JIDVAYGSZMEUTXJWTKHJ \
  | 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: e685c1e9281d41834b2c252774da6a3a670d46b326853b93074fdc697b6e2626

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa7db7090ae730536616e0c89a0ae9a282de45ab2054eb245d3d19d6db45f990",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-10-29T15:49:32Z",
    "title_canon_sha256": "d05ab4e9db6ac9c05c8eee1b8c163d69ce92b88c86337888727bbc16d524653a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.5666",
    "kind": "arxiv",
    "version": 1
  }
}