Pith Number

pith:QTZ4D6AN

pith:2003:QTZ4D6ANRZ3K7DMAYKBAXQR66A

not attested not anchored not stored refs pending

The Active Quiescence of HR Del (Nova Del 1967)

Michael Friedjung, Pierluigi Selvelli

arxiv:astro-ph/0301572 v1 · 2003-01-29 · 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{QTZ4D6ANRZ3K7DMAYKBAXQR66A}

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	2026-05-18T04:21:42.073880Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84f3c1f80d8e76af8d80c2820bc23ef03e6358e741641b80c31fc434d0f6f0ae

Aliases

arxiv: astro-ph/0301572 · arxiv_version: astro-ph/0301572v1 · doi: 10.48550/arxiv.astro-ph/0301572 · pith_short_12: QTZ4D6ANRZ3K · pith_short_16: QTZ4D6ANRZ3K7DMA · pith_short_8: QTZ4D6AN

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/QTZ4D6ANRZ3K7DMAYKBAXQR66A \
  | 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: 84f3c1f80d8e76af8d80c2820bc23ef03e6358e741641b80c31fc434d0f6f0ae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df8ee2bb61ebec81de690492aae603d586e7af549c0b4005e516686ff7c335ac",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-01-29T11:59:31Z",
    "title_canon_sha256": "fa97534b6adb35df307fa4bd497ff6e21f2ed6681f33b43669fb41ac31a648f0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0301572",
    "kind": "arxiv",
    "version": 1
  }
}