Pith Number

pith:QDRUX5YN

pith:2005:QDRUX5YNTAU5YOB533XGVDOK4L

not attested not anchored not stored refs pending

Local Galaxies as Damped Ly-Alpha Analogs

(2) Kapteyn Astronomical Institute, (3) RSAA, 4), (4) Australian National Telescope Facility, (5) Institute of Astronomy, Cambridge), E. V. Ryan-Weber (5) ((1) European Southern Observatory, F. H. Briggs (3, Garching, J. M. van der Hulst (2), M. A. W. Verheijen (2), M. A. Zwaan (1), Mount Stromlo Observatory

arxiv:astro-ph/0508232 v1 · 2005-08-10 · 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{QDRUX5YNTAU5YOB533XGVDOK4L}

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	2026-05-18T01:40:33.639759Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80e34bf70d9829dc383ddeee6a8dcae2ee87d6b094716a2c5da9b8aae32de8ce

Aliases

arxiv: astro-ph/0508232 · arxiv_version: astro-ph/0508232v1 · doi: 10.48550/arxiv.astro-ph/0508232 · pith_short_12: QDRUX5YNTAU5 · pith_short_16: QDRUX5YNTAU5YOB5 · pith_short_8: QDRUX5YN

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/QDRUX5YNTAU5YOB533XGVDOK4L \
  | 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: 80e34bf70d9829dc383ddeee6a8dcae2ee87d6b094716a2c5da9b8aae32de8ce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "880260fd059fed9b86f57d8c7190bdd3d9969a2422ea6be806f54fa8ce9c4c51",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-08-10T10:17:08Z",
    "title_canon_sha256": "f10da984471ff31e14c114d09aaaa4f24942585d20ab7ecf67278284114d5bcf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0508232",
    "kind": "arxiv",
    "version": 1
  }
}