Pith Number

pith:ERPATM34

pith:2009:ERPATM34MEQQ5PRVQK4HH2S67W

not attested not anchored not stored refs pending

Long-term variability of the optical spectra of NGC 4151: II. Evolution of the broad Ha and Hb emission-line profiles

A.I. Shapovalova, A. Kovacevic, A.N.Burenkov, D. Ilic, J. Leon-Tavares, L.C. Popovic, N.G. Bochkarev, V.H. Chavushyan

arxiv:0910.2980 v1 · 2009-10-15 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ERPATM34MEQQ5PRVQK4HH2S67W}

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	2026-05-18T02:11:23.130070Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

245e09b37c61210ebe3582b873ea5efdaf60101075bd173e66c5d78f22ac1928

Aliases

arxiv: 0910.2980 · arxiv_version: 0910.2980v1 · doi: 10.48550/arxiv.0910.2980 · pith_short_12: ERPATM34MEQQ · pith_short_16: ERPATM34MEQQ5PRV · pith_short_8: ERPATM34

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/ERPATM34MEQQ5PRVQK4HH2S67W \
  | 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: 245e09b37c61210ebe3582b873ea5efdaf60101075bd173e66c5d78f22ac1928

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f237660d756476ca148274980e43f21eb9ed439f843c63e937c30837e5eb45fa",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-10-15T20:43:43Z",
    "title_canon_sha256": "38a5b4feda714c2ed4bd11caa2228754d91b14feec1bb953df074229f56a2847"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.2980",
    "kind": "arxiv",
    "version": 1
  }
}