Pith Number

pith:ULEC36FH

pith:2010:ULEC36FHW5KDZ2YQPR6FMWWETH

not attested not anchored not stored refs pending

The quasar PG 0844+349 in an X-ray weak state

(2) PSU, (3) XMM Science Operations, (4) MPE, (5) CSIC-INTA, (6) IoA), A. C. Fabian (6), D. Grupe (2), ESA, G. Miniutti (5), L. C. Gallo (1), M. Santos-Lleo (3) ((1) Saint Mary's Univ., N. Schartel (3), S. Komossa (4)

arxiv:1010.4453 v1 · 2010-10-21 · 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{ULEC36FHW5KDZ2YQPR6FMWWETH}

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	2026-05-18T02:05:00.035612Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2c82df8a7b7543ceb107c7c565ac499c1bc9a6d81170200a1eef937e2209586

Aliases

arxiv: 1010.4453 · arxiv_version: 1010.4453v1 · doi: 10.48550/arxiv.1010.4453 · pith_short_12: ULEC36FHW5KD · pith_short_16: ULEC36FHW5KDZ2YQ · pith_short_8: ULEC36FH

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/ULEC36FHW5KDZ2YQPR6FMWWETH \
  | 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: a2c82df8a7b7543ceb107c7c565ac499c1bc9a6d81170200a1eef937e2209586

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ed28fe7d00d814286d1e3d495d7e02edaf5cb2dfeb3f859e86c56aa7540fc763",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2010-10-21T12:27:26Z",
    "title_canon_sha256": "94e2d1d5e7aa627c7c0999165ae40abe19ad1d9dd3d30ad61a9be6fe05ecaf83"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1010.4453",
    "kind": "arxiv",
    "version": 1
  }
}