Pith Number

pith:52Q4GDKL

pith:2011:52Q4GDKLUEG76FFYKD534S5XYZ

not attested not anchored not stored refs pending

Optical emission of the ultraluminous X-ray source NGC 5408 X-1: donor star or irradiated accretion disk?

D\'avid Cseh, Fabien Gris\'e, Hua Feng, Lian Tao, Philip Kaaret, St\'ephane Corbel

arxiv:1109.4423 v1 · 2011-09-20 · astro-ph.HE · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{52Q4GDKLUEG76FFYKD534S5XYZ}

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	2026-05-18T02:00:27.479891Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eea1c30d4ba10dff14b850fbbe4bb7c64ff149404c6d03ebb185df189af04ad8

Aliases

arxiv: 1109.4423 · arxiv_version: 1109.4423v1 · doi: 10.48550/arxiv.1109.4423 · pith_short_12: 52Q4GDKLUEG7 · pith_short_16: 52Q4GDKLUEG76FFY · pith_short_8: 52Q4GDKL

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/52Q4GDKLUEG76FFYKD534S5XYZ \
  | 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: eea1c30d4ba10dff14b850fbbe4bb7c64ff149404c6d03ebb185df189af04ad8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "61a3c96ca337e9eb22414851bfe4e679108b6ca6012d480477fc7055e3107116",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2011-09-20T20:09:34Z",
    "title_canon_sha256": "abc92d8d5dfaee97c255c16ba4e2687abfbf1b74438f85c42cfb67a81371e002"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.4423",
    "kind": "arxiv",
    "version": 1
  }
}