Pith Number

pith:BBXFQLKF

pith:2003:BBXFQLKFM73N3KCZPPYNINCCJB

not attested not anchored not stored refs pending

H_2-bearing damped Lyman-alpha systems as tracers of cosmological chemical evolution

Cambridge), J. K. Webb (UNSW), M. T. Murphy (IoA, S. J. Curran (UNSW)

arxiv:astro-ph/0310409 v2 · 2003-10-15 · 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{BBXFQLKFM73N3KCZPPYNINCCJB}

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	2026-07-04T14:13:05.748634Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

086e582d4567f6dda8597bf0d434424853d0a09a70f1112551041a2e22874cca

Aliases

arxiv: astro-ph/0310409 · arxiv_version: astro-ph/0310409v2 · doi: 10.48550/arxiv.astro-ph/0310409 · pith_short_12: BBXFQLKFM73N · pith_short_16: BBXFQLKFM73N3KCZ · pith_short_8: BBXFQLKF

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/BBXFQLKFM73N3KCZPPYNINCCJB \
  | 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: 086e582d4567f6dda8597bf0d434424853d0a09a70f1112551041a2e22874cca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6634669d7404be08a623710b4063d05c41013ce3feda03d9a01c0cd94420b517",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-10-15T11:19:59Z",
    "title_canon_sha256": "ae779ce5f84ffd865de161be3a7372d381f193712201f7b979f058e88fe504a4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0310409",
    "kind": "arxiv",
    "version": 2
  }
}