Pith Number

pith:BJGFEWKJ

pith:2011:BJGFEWKJQLCO5TRB4KRO2ZCX74

not attested not anchored not stored refs pending

Low-Resolution Sodium D Absorption is a Bad Proxy for Extinction

Alexei V. Filippenko, Dovi Poznanski, Jeffrey M. Silverman, Mohan Ganeshaligam

arxiv:1106.1469 v1 · 2011-06-07 · astro-ph.CO

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

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	2026-05-18T02:01:40.966087Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0a4c52594982c4eece21e2a2ed6457ff3bc759782da05f068fbf7b5b51dd4d4b

Aliases

arxiv: 1106.1469 · arxiv_version: 1106.1469v1 · doi: 10.48550/arxiv.1106.1469 · pith_short_12: BJGFEWKJQLCO · pith_short_16: BJGFEWKJQLCO5TRB · pith_short_8: BJGFEWKJ

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/BJGFEWKJQLCO5TRB4KRO2ZCX74 \
  | 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: 0a4c52594982c4eece21e2a2ed6457ff3bc759782da05f068fbf7b5b51dd4d4b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "666f779d264b5ee439970cf9884c1fc40e93c64bc4966210753cde4fafb369c6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-06-07T22:24:19Z",
    "title_canon_sha256": "e8cdbe949040e0986aee45d28d272e3db9b4be8523aefa769f8f3c7db84fef8a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.1469",
    "kind": "arxiv",
    "version": 1
  }
}