Pith Number

pith:V7HBGGXX

pith:1999:V7HBGGXX2V7IEQIIIEOGP5FKKJ

not attested not anchored not stored refs pending

The 1999 Hercules X-1 Anomalous Low State

D. E. Gruber, I. Kreykenbohm, J. Wilms, K. A. Postnov, M. R. Pelling, N. Shakura, P. Risse, R. E. Rothschild, R. Staubert, W. A. Heindl, W. Coburn

arxiv:astro-ph/9911533 v2 · 1999-11-30 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{V7HBGGXX2V7IEQIIIEOGP5FKKJ}

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	2026-07-04T16:11:57.562407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

afce131af7d57e824108411c67f4aa526ef936b06f27c905d5238e601b8ab93f

Aliases

arxiv: astro-ph/9911533 · arxiv_version: astro-ph/9911533v2 · doi: 10.48550/arxiv.astro-ph/9911533 · pith_short_12: V7HBGGXX2V7I · pith_short_16: V7HBGGXX2V7IEQII · pith_short_8: V7HBGGXX

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/V7HBGGXX2V7IEQIIIEOGP5FKKJ \
  | 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: afce131af7d57e824108411c67f4aa526ef936b06f27c905d5238e601b8ab93f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "677a8cb53b06833381e093e2a71221c60958a229b4de708bbe9858fc4cf8f076",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-11-30T22:59:54Z",
    "title_canon_sha256": "74115136e7ab29af9260d0781991ec436138c5811646141e86fa962faee6e773"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9911533",
    "kind": "arxiv",
    "version": 2
  }
}