Pith Number

pith:FDOHG4YP

pith:2012:FDOHG4YPWKV33ILMEC4UVXDWWZ

not attested not anchored not stored refs pending

Classification of X-ray Sources in the XMM-Newton Serendipitous Source Catalog

Dacheng Lin, Didier Barret (IRAP, France), Natalie A. Webb

arxiv:1207.1913 v1 · 2012-07-08 · 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{FDOHG4YPWKV33ILMEC4UVXDWWZ}

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	2026-05-18T01:56:26.870133Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28dc73730fb2abbda16c20b94adc76b6538e723428488db63e659e70590f9254

Aliases

arxiv: 1207.1913 · arxiv_version: 1207.1913v1 · doi: 10.48550/arxiv.1207.1913 · pith_short_12: FDOHG4YPWKV3 · pith_short_16: FDOHG4YPWKV33ILM · pith_short_8: FDOHG4YP

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/FDOHG4YPWKV33ILMEC4UVXDWWZ \
  | 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: 28dc73730fb2abbda16c20b94adc76b6538e723428488db63e659e70590f9254

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd8a60ff9c05357e75d2155d41817f6f29bc8a370fa8278f523a9b462d966de6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-07-08T21:23:49Z",
    "title_canon_sha256": "5fe60ebcf20f1309cac0c9b271d0ea849e20b6e22f7a2b69f9d681e135f7e9d1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.1913",
    "kind": "arxiv",
    "version": 1
  }
}