Pith Number

pith:DCQ7OS2D

pith:1999:DCQ7OS2DVUZUR2KFTYJQXI5Q4Y

not attested not anchored not stored refs pending

HI and OH absorption at z=0.89

A. G. de Bruyn, D. Narasimha, Jayaram N. Chengalur

arxiv:astro-ph/9904055 v2 · 1999-04-05 · 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{DCQ7OS2DVUZUR2KFTYJQXI5Q4Y}

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	2026-05-18T04:21:32.310945Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18a1f74b43ad3348e9459e130ba3b0e6169fd6174a9a8b49e051c606c0afd342

Aliases

arxiv: astro-ph/9904055 · arxiv_version: astro-ph/9904055v2 · doi: 10.48550/arxiv.astro-ph/9904055 · pith_short_12: DCQ7OS2DVUZU · pith_short_16: DCQ7OS2DVUZUR2KF · pith_short_8: DCQ7OS2D

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/DCQ7OS2DVUZUR2KFTYJQXI5Q4Y \
  | 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: 18a1f74b43ad3348e9459e130ba3b0e6169fd6174a9a8b49e051c606c0afd342

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c67ef792b0effd15129ec1c1e3bd08fefb4b3b86d60c11b4a9e3ccb337c5bed9",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-04-05T06:39:48Z",
    "title_canon_sha256": "a0c1dd15b8af6ede99f695af6b49002c0039eae434366183136b18504bdd12a9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9904055",
    "kind": "arxiv",
    "version": 2
  }
}