Pith Number

pith:WK2VK7KQ

pith:2009:WK2VK7KQQDI43HDDIOSUJJGDKA

not attested not anchored not stored refs pending

New 3-D gas density maps of NaI and CaII interstellar absorption within 300pc

Barry Y. Welsh, Jean-Luc Vergely, Rosine Lallement, Severine Raimond

arxiv:0912.3040 v1 · 2009-12-16 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WK2VK7KQQDI43HDDIOSUJJGDKA}

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	2026-05-18T02:10:16.781202Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b2b5557d5080d1cd9c6343a544a4c3500875486cf3595cc2f03bb06e1424aed3

Aliases

arxiv: 0912.3040 · arxiv_version: 0912.3040v1 · doi: 10.48550/arxiv.0912.3040 · pith_short_12: WK2VK7KQQDI4 · pith_short_16: WK2VK7KQQDI43HDD · pith_short_8: WK2VK7KQ

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/WK2VK7KQQDI43HDDIOSUJJGDKA \
  | 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: b2b5557d5080d1cd9c6343a544a4c3500875486cf3595cc2f03bb06e1424aed3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "af9043a91ec04c64f02c60db4ec164a75567e0b4038a876f36e5a4e332316926",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-12-16T01:05:50Z",
    "title_canon_sha256": "5a3f9396943693cb8346eda8955160756f287c3bf468ea97fceba7ee92dff280"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.3040",
    "kind": "arxiv",
    "version": 1
  }
}