Pith Number

pith:II5J3ACK

pith:1998:II5J3ACKCXOSJEF6I6QUU5NIRY

not attested not anchored not stored refs pending

Seeking the Ultraviolet Ionizing Background at z~3 with the Keck Telescope

Andrew J. Bunker, Berkeley), Francine R. Marleau, James R. Graham (Department of Astronomy, University of California

arxiv:astro-ph/9808111 v1 · 1998-08-11 · 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{II5J3ACKCXOSJEF6I6QUU5NIRY}

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	2026-05-18T01:40:13.781778Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

423a9d804a15dd2490be47a14a75a88e069561f3e4cfd9c8b9d8cad4c0e61e06

Aliases

arxiv: astro-ph/9808111 · arxiv_version: astro-ph/9808111v1 · doi: 10.48550/arxiv.astro-ph/9808111 · pith_short_12: II5J3ACKCXOS · pith_short_16: II5J3ACKCXOSJEF6 · pith_short_8: II5J3ACK

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/II5J3ACKCXOSJEF6I6QUU5NIRY \
  | 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: 423a9d804a15dd2490be47a14a75a88e069561f3e4cfd9c8b9d8cad4c0e61e06

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "db1cff9a256c513c9f84f92f3497877c8e9a5a23cd8b7b969e4374fd741710c6",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-08-11T23:57:05Z",
    "title_canon_sha256": "977796e02820ec992b8d1f4a5feaff8d03f6a4c4d5e2f30db217a718e5849c71"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9808111",
    "kind": "arxiv",
    "version": 1
  }
}