Pith Number

pith:W6Q2E4IA

pith:2009:W6Q2E4IALACKAZCTPRYTVV2HKO

not attested not anchored not stored refs pending

The column density towards LMC X-1

Joern Wilms, Laura Barragan, Manfred Hanke, Michael A. Nowak, Norbert S. Schulz

arxiv:0912.3719 v1 · 2009-12-18 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W6Q2E4IALACKAZCTPRYTVV2HKO}

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	2026-05-18T02:10:15.583432Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7a1a271005804a064537c713ad74753b791e4f4f567a18cfcb387adf10e5d8d

Aliases

arxiv: 0912.3719 · arxiv_version: 0912.3719v1 · doi: 10.48550/arxiv.0912.3719 · pith_short_12: W6Q2E4IALACK · pith_short_16: W6Q2E4IALACKAZCT · pith_short_8: W6Q2E4IA

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/W6Q2E4IALACKAZCTPRYTVV2HKO \
  | 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: b7a1a271005804a064537c713ad74753b791e4f4f567a18cfcb387adf10e5d8d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f53ea7507c91bb55b186e7d87a29b8aaffe8e06333ef8a2a5982094f64e6211",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-12-18T16:18:53Z",
    "title_canon_sha256": "b27376aec069467d51d1a3aa1a98a63af18afd0e83a13016223a399d29a2a1ce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.3719",
    "kind": "arxiv",
    "version": 1
  }
}