Pith Number

pith:NSR2L36S

pith:2011:NSR2L36S2NSLTFZQHPT5KUYCCD

not attested not anchored not stored refs pending

Spectral optical monitoring of 3C 390.3 in 1995-2007: II. Variability of the spectral line parameters

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

arxiv:1101.4867 v1 · 2011-01-25 · 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{NSR2L36S2NSLTFZQHPT5KUYCCD}

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	2026-05-18T02:03:22.388999Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ca3a5efd2d364b997303be7d5530210f47c56386c7e606527df596de173a617

Aliases

arxiv: 1101.4867 · arxiv_version: 1101.4867v1 · doi: 10.48550/arxiv.1101.4867 · pith_short_12: NSR2L36S2NSL · pith_short_16: NSR2L36S2NSLTFZQ · pith_short_8: NSR2L36S

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/NSR2L36S2NSLTFZQHPT5KUYCCD \
  | 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: 6ca3a5efd2d364b997303be7d5530210f47c56386c7e606527df596de173a617

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7cfa65bc56e2c38ede4168bbd78b9af796639ee235e0fdc7bcb531a65a47a9d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-01-25T16:34:29Z",
    "title_canon_sha256": "f635d7747fa93bc622908d0442084a68c1a1d23557a1aa9b729f23f9215ed91c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.4867",
    "kind": "arxiv",
    "version": 1
  }
}