Pith Number

pith:4DW4LO7M

pith:2004:4DW4LO7MAJG4FWITDR2DUKMZHM

not attested not anchored not stored refs pending

High-Resolution Ultraviolet Spectra of the Dwarf Seyfert 1 Galaxy NGC 4395: Evidence for Intrinsic Absorption

A.V. Filippenko, D.M. Crenshaw, H.R. Schmitt, J.C. Shields, J.R. Gabel, L.C. Ho, S.B. Kraemer, T.J. Turner

arxiv:astro-ph/0405354 v1 · 2004-05-18 · 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{4DW4LO7MAJG4FWITDR2DUKMZHM}

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	2026-07-04T16:43:47.572189Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0edc5bbec024dc2d9131c743a29993b0e520ebba06e12ccb0622527cbf8b99d

Aliases

arxiv: astro-ph/0405354 · arxiv_version: astro-ph/0405354v1 · doi: 10.48550/arxiv.astro-ph/0405354 · pith_short_12: 4DW4LO7MAJG4 · pith_short_16: 4DW4LO7MAJG4FWIT · pith_short_8: 4DW4LO7M

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/4DW4LO7MAJG4FWITDR2DUKMZHM \
  | 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: e0edc5bbec024dc2d9131c743a29993b0e520ebba06e12ccb0622527cbf8b99d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e19d6ebb254b18e7a951883eb4d8f25133e3cc19a2c27578b9eb793ecb7dccd",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-05-18T19:31:15Z",
    "title_canon_sha256": "1f46d7be4db23dc830e44da75f96d69db4aad452b14a753aa290b0db1a66a562"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0405354",
    "kind": "arxiv",
    "version": 1
  }
}