Pith Number

pith:4PSP7CUK

pith:2013:4PSP7CUKVY42SEW6NRCENE6XIN

not attested not anchored not stored refs pending

Classification of X-ray Sources in the XMM-Newton Serendipitous Source Catalog: Objects of Special Interest

2), (2) University of Alabama, Dacheng Lin (1, Didier Barret (1) ((1) IRAP, France, Natalie A. Webb (1), USA)

arxiv:1309.0509 v2 · 2013-09-02 · astro-ph.HE · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4PSP7CUKVY42SEW6NRCENE6XIN}

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	2026-05-18T01:47:50.581191Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e3e4ff8a8aae39a912de6c444693d7437b8a83843653045b27aa1386bee84a0a

Aliases

arxiv: 1309.0509 · arxiv_version: 1309.0509v2 · doi: 10.48550/arxiv.1309.0509 · pith_short_12: 4PSP7CUKVY42 · pith_short_16: 4PSP7CUKVY42SEW6 · pith_short_8: 4PSP7CUK

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/4PSP7CUKVY42SEW6NRCENE6XIN \
  | 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: e3e4ff8a8aae39a912de6c444693d7437b8a83843653045b27aa1386bee84a0a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "843f6d71ffb14f896a9653d37a2f1e2e09a9d61fa18099711c2d9651a4131051",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-09-02T20:00:02Z",
    "title_canon_sha256": "8b321b77ce5b5831f8895e27fb17e0922e742e8ab869c39fae1bc11923acc24b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.0509",
    "kind": "arxiv",
    "version": 2
  }
}