Pith Number

pith:XBBAS4WI

pith:1999:XBBAS4WIALTUHPOD4EOQFMWPKZ

not attested not anchored not stored refs pending

Ly-alpha Emission from a Lyman Limit Absorber at z=3.036

Aarhus University), B. Thomsen (IFA, Germany), J.U.Fynbo (IFA, P. Moller (European Southern Observatory

arxiv:astro-ph/9911146 v1 · 1999-11-09 · 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{XBBAS4WIALTUHPOD4EOQFMWPKZ}

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	2026-05-18T04:21:32.032342Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b8420972c802e743bdc3e11d02b2cf5644ad2d94061b82183d3b619fc3fa8a6f

Aliases

arxiv: astro-ph/9911146 · arxiv_version: astro-ph/9911146v1 · doi: 10.48550/arxiv.astro-ph/9911146 · pith_short_12: XBBAS4WIALTU · pith_short_16: XBBAS4WIALTUHPOD · pith_short_8: XBBAS4WI

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/XBBAS4WIALTUHPOD4EOQFMWPKZ \
  | 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: b8420972c802e743bdc3e11d02b2cf5644ad2d94061b82183d3b619fc3fa8a6f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c982296b77ec8f472212cc85e1bf0be648520722b667028e5b91b2754d3ad6d4",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-11-09T16:42:44Z",
    "title_canon_sha256": "438495341febd99be0158794d64b8dc240711215d1fd96937905fb0825276d38"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9911146",
    "kind": "arxiv",
    "version": 1
  }
}