Pith Number

pith:NHR3OKOG

pith:2015:NHR3OKOGMBXHH5L53ZJGVLWDNA

not attested not anchored not stored refs pending

Variable Reddening and Broad Absorption Lines in the Narrow-line Seyfert 1 Galaxy WPVS 007: an Origin in the Torus

(2) Morehead State University, (3) Ohio State University, (4) Max-Planck Institut fur Radioastronmie), Dirk Grupe (2), Donald M. Terndrup (3), Erin Cooper (1), Karen M. Leighly (1), S. Komossa (4) ((1) The University of Oklahoma

arxiv:1508.01257 v1 · 2015-08-06 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NHR3OKOGMBXHH5L53ZJGVLWDNA}

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	2026-05-18T01:35:06.473367Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69e3b729c6606e73f57dde526aaec3681d490fdba282bada66cdd36531e5671d

Aliases

arxiv: 1508.01257 · arxiv_version: 1508.01257v1 · doi: 10.48550/arxiv.1508.01257 · pith_short_12: NHR3OKOGMBXH · pith_short_16: NHR3OKOGMBXHH5L5 · pith_short_8: NHR3OKOG

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/NHR3OKOGMBXHH5L53ZJGVLWDNA \
  | 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: 69e3b729c6606e73f57dde526aaec3681d490fdba282bada66cdd36531e5671d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f0188ccaa3ecbb72b18f82c93d2e4a0c327b5872fd9d39ebe029c1763557ad0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-08-06T01:39:37Z",
    "title_canon_sha256": "b7fa9b7028ad25b0086ae9aa481c3a1d3cac9539ffffe3c8e90da16d0e8fdbf8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.01257",
    "kind": "arxiv",
    "version": 1
  }
}