Pith Number

pith:RQQA435M

pith:2001:RQQA435M6JWI53HCIRB336Y7K5

not attested not anchored not stored refs pending

Column density distribution of galactic Ly-alpha absorption systems

Milan M. Cirkovic, Srdjan Samurovic

arxiv:astro-ph/0108267 v1 · 2001-08-15 · 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{RQQA435M6JWI53HCIRB336Y7K5}

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	2026-05-18T01:40:44.246909Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8c200e6facf26c8eece24443bdfb1f574ad279d0cebfb5835d33e6295381b583

Aliases

arxiv: astro-ph/0108267 · arxiv_version: astro-ph/0108267v1 · doi: 10.48550/arxiv.astro-ph/0108267 · pith_short_12: RQQA435M6JWI · pith_short_16: RQQA435M6JWI53HC · pith_short_8: RQQA435M

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/RQQA435M6JWI53HCIRB336Y7K5 \
  | 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: 8c200e6facf26c8eece24443bdfb1f574ad279d0cebfb5835d33e6295381b583

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "91d761c6bf95e2ef7462c7c9acd2daba7880a840160eaf9f1668f5ce689d2342",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-08-15T23:07:32Z",
    "title_canon_sha256": "ad8c3ac994b23947747e510aa3f1a2253d1e749455b4c9a1635aead91de9687d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0108267",
    "kind": "arxiv",
    "version": 1
  }
}