Pith Number

pith:WQBKULFY

pith:2009:WQBKULFY5TZB5S2MCM6MD5R65F

not attested not anchored not stored refs pending

Discovery of the orbital period in the supergiant fast X-ray transient IGR J17544-2619

A. B. Hill (2), A. J. Bird (1), A. J. Dean (1) ((1) School of Physics, Astronomy, D. J. Clark (1), France), S. Scaringi (1), UK (2) Laboratoire dAstrophysique de Grenoble, UMR 5571 CNRS, Universite Joseph Fourier, University of Southampton, V. A. McBride (1)

arxiv:0908.1041 v1 · 2009-08-07 · 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{WQBKULFY5TZB5S2MCM6MD5R65F}

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	2026-05-18T02:12:36.710526Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b402aa2cb8ecf21ecb4c133cc1f63ee9432bec999d607a5cc2bab229d542c2a9

Aliases

arxiv: 0908.1041 · arxiv_version: 0908.1041v1 · doi: 10.48550/arxiv.0908.1041 · pith_short_12: WQBKULFY5TZB · pith_short_16: WQBKULFY5TZB5S2M · pith_short_8: WQBKULFY

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/WQBKULFY5TZB5S2MCM6MD5R65F \
  | 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: b402aa2cb8ecf21ecb4c133cc1f63ee9432bec999d607a5cc2bab229d542c2a9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7040def2f6d6840772ce9cdb23e75fe511b0662c95445e9a5ae120311762005",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-08-07T12:52:29Z",
    "title_canon_sha256": "3846143382c0e808cb056461e01dd43e207eec9b9f322803a83eb7818731256f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.1041",
    "kind": "arxiv",
    "version": 1
  }
}