Pith Number

pith:NGGJJPZG

pith:2006:NGGJJPZGA4SWZF2GRGYOM4GRUF

not attested not anchored not stored refs pending

CaII and DLA absorption line systems: dust, metals and star formation at 0.4<z<1.3

(2) IoA, Cambridge), Garching, Max Pettini (2) ((1) MPA, Paul Hewett (2), Vivienne Wild (1)

arxiv:astro-ph/0607481 v1 · 2006-07-21 · 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{NGGJJPZGA4SWZF2GRGYOM4GRUF}

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	2026-07-04T14:55:19.966896Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

698c94bf2607256c974689b0e670d1a14cde7773211e86f4ec6e65ffe27cf4d0

Aliases

arxiv: astro-ph/0607481 · arxiv_version: astro-ph/0607481v1 · doi: 10.48550/arxiv.astro-ph/0607481 · pith_short_12: NGGJJPZGA4SW · pith_short_16: NGGJJPZGA4SWZF2G · pith_short_8: NGGJJPZG

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/NGGJJPZGA4SWZF2GRGYOM4GRUF \
  | 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: 698c94bf2607256c974689b0e670d1a14cde7773211e86f4ec6e65ffe27cf4d0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4aa4eca029a95f3c21f5a31c7fcdade3b6651fb6e7f00ec7d980e5f6c6e51d71",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-07-21T16:02:14Z",
    "title_canon_sha256": "e0da9a80bffc3d2449041972b01b51d2e6318e5f28a54a2709534b650b996e7b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0607481",
    "kind": "arxiv",
    "version": 1
  }
}