Pith Number

pith:CWOIQVKM

pith:2003:CWOIQVKMB5JLTDHLHFIDWFUXVR

not attested not anchored not stored refs pending

Near-IR spectroscopy of PKS1549-79: a proto-quasar revealed?

C. A. Watson, C. N. Tadhunter, J. Holt, K. A. Wills, M. D. Taylor, M. J. Bellamy, R. Morganti

arxiv:astro-ph/0308345 v1 · 2003-08-20 · 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{CWOIQVKMB5JLTDHLHFIDWFUXVR}

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	2026-07-04T16:51:29.618938Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

159c88554c0f52b98ceb39503b1697ac6bc178e7685e806c6beb79ec8672d442

Aliases

arxiv: astro-ph/0308345 · arxiv_version: astro-ph/0308345v1 · doi: 10.48550/arxiv.astro-ph/0308345 · pith_short_12: CWOIQVKMB5JL · pith_short_16: CWOIQVKMB5JLTDHL · pith_short_8: CWOIQVKM

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/CWOIQVKMB5JLTDHLHFIDWFUXVR \
  | 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: 159c88554c0f52b98ceb39503b1697ac6bc178e7685e806c6beb79ec8672d442

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b6abc4a7c15ae552ea6323d8027491147a124ad8b9fe171c72c25ed451aeb99",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-08-20T16:01:00Z",
    "title_canon_sha256": "198cfa76cc129325fab04614095bee8e1b63f6a568851949f7e231f914a676ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0308345",
    "kind": "arxiv",
    "version": 1
  }
}