Pith Number

pith:4WZTADCD

pith:2008:4WZTADCDM2ZCNTHBSY3XMN2DOE

not attested not anchored not stored refs pending

Multiwavelength Monitoring of the Dwarf Seyfert 1 Galaxy NGC 4395. IV. The Variable UV Absorption Lines

Alexei Baskin, Ari Laor

arxiv:0804.0218 v1 · 2008-04-01 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4WZTADCDM2ZCNTHBSY3XMN2DOE}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T03:27:41.412382Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e5b3300c4366b226cce19637763743713f4bafbf83f2e14ba3cdab1037df2f6d

Aliases

arxiv: 0804.0218 · arxiv_version: 0804.0218v1 · doi: 10.48550/arxiv.0804.0218 · pith_short_12: 4WZTADCDM2ZC · pith_short_16: 4WZTADCDM2ZCNTHB · pith_short_8: 4WZTADCD

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/4WZTADCDM2ZCNTHBSY3XMN2DOE \
  | 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: e5b3300c4366b226cce19637763743713f4bafbf83f2e14ba3cdab1037df2f6d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e9d8c8008698045afa172d5d6dbfb5f9788237e3581cee0df71ef6c4fa858036",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-04-01T19:11:01Z",
    "title_canon_sha256": "cfe8afcb9e817e1995357c148d850928e4a40d4942d32cc679f8c79add061c45"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0804.0218",
    "kind": "arxiv",
    "version": 1
  }
}