Pith Number

pith:TVIO3CD7

pith:1999:TVIO3CD7I4TM6ZIMFFVFT4JXUW

not attested not anchored not stored refs pending

The Origin of \lya Absorption Systems at $z>1$---Implications from the Hubble Deep Field

Alberto Fern\'andez-Soto, Hsiao-Wen Chen, Kenneth M. Lanzetta

arxiv:astro-ph/9912122 v1 · 1999-12-07 · 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{TVIO3CD7I4TM6ZIMFFVFT4JXUW}

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	2026-05-18T01:09:21.310231Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9d50ed887f4726cf650c296a59f137a5b276a8b91e588180f3af2c0e5eb95573

Aliases

arxiv: astro-ph/9912122 · arxiv_version: astro-ph/9912122v1 · doi: 10.48550/arxiv.astro-ph/9912122 · pith_short_12: TVIO3CD7I4TM · pith_short_16: TVIO3CD7I4TM6ZIM · pith_short_8: TVIO3CD7

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/TVIO3CD7I4TM6ZIMFFVFT4JXUW \
  | 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: 9d50ed887f4726cf650c296a59f137a5b276a8b91e588180f3af2c0e5eb95573

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "99ba38daacb0e2c8d1ed4df4cacb3fb51b79af844ecc11d5e72d18dfce1c3bfb",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-12-07T01:15:44Z",
    "title_canon_sha256": "149867ba7f6773ca5a2e10c5e521c3a408896e82e4b48f9562199ef63f915a84"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9912122",
    "kind": "arxiv",
    "version": 1
  }
}