Pith Number

pith:J25OJAE4

pith:2004:J25OJAE44G6LFAVPUZPJPFSN2T

not attested not anchored not stored refs pending

The SDSS Damped Lya Survey: Data Release 1

Jason X. Prochaska, Stephane Herbert-Fort (UCO/Lick Observatory)

arxiv:astro-ph/0403391 v2 · 2004-03-16 · 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{J25OJAE44G6LFAVPUZPJPFSN2T}

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	2026-05-18T01:40:37.242534Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ebae4809ce1bcb282afa65e97964dd4e7a6a67d532396aa477a83f6fb2db431

Aliases

arxiv: astro-ph/0403391 · arxiv_version: astro-ph/0403391v2 · doi: 10.48550/arxiv.astro-ph/0403391 · pith_short_12: J25OJAE44G6L · pith_short_16: J25OJAE44G6LFAVP · pith_short_8: J25OJAE4

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/J25OJAE44G6LFAVPUZPJPFSN2T \
  | 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: 4ebae4809ce1bcb282afa65e97964dd4e7a6a67d532396aa477a83f6fb2db431

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "21c35984f6a7d749f0198b16c7635faa5d029b9dd96fafe181465c9b82f201dc",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-03-16T21:44:45Z",
    "title_canon_sha256": "59aec09e3f8b1689d09eddc14cd4cca879b3977fef8ff99bdb0d76009895d37c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0403391",
    "kind": "arxiv",
    "version": 2
  }
}