Pith Number

pith:AXGKWTDP

pith:2001:AXGKWTDP4RYJZKEF6UZQWVSBQ7

not attested not anchored not stored refs pending

Where is the Neutral Atomic Gas in Hickson Groups?

A. Del Olmo, B. A. Williams, J. Perea, L. Verdes-Montenegro, M. S. Yun, W. K. Huchtmeier

arxiv:astro-ph/0108223 v1 · 2001-08-13 · 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{AXGKWTDP4RYJZKEF6UZQWVSBQ7}

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	2026-07-04T16:23:57.828075Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

05ccab4c6fe4709ca885f5330b564187f6611f57726d49ee7e311846b4013ed5

Aliases

arxiv: astro-ph/0108223 · arxiv_version: astro-ph/0108223v1 · doi: 10.48550/arxiv.astro-ph/0108223 · pith_short_12: AXGKWTDP4RYJ · pith_short_16: AXGKWTDP4RYJZKEF · pith_short_8: AXGKWTDP

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/AXGKWTDP4RYJZKEF6UZQWVSBQ7 \
  | 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: 05ccab4c6fe4709ca885f5330b564187f6611f57726d49ee7e311846b4013ed5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fc7790ab38bb8863f3abfb644bb6a393955540a131017af99ccc34fc1b34ddf2",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-08-13T23:05:42Z",
    "title_canon_sha256": "9dd91444d98db863520b59b9f7178386333a6be0be2810b22c4bdd1b509f8465"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0108223",
    "kind": "arxiv",
    "version": 1
  }
}