Pith Number

pith:2E3B6NTF

pith:2019:2E3B6NTFQ5VZAKNVOVD7UZNRH2

not attested not anchored not stored refs pending

Long-term optical spectral monitoring of a changing-look AGN NGC 3516 I: Continuum and broad-line flux variability

A. I. Shapovalova, A. Kovacevic, A. N. Burenkov, D. Ilic, J. R. Valdes, L. Carrasco, L. C. Popovic, N. G. Bochkarev, O. Spiridonova, S. Marceta-Mandic, V. E. Zhdanova, V. H. Chavushyan, V. L. Afanasiev, V. Patino-Alvarez

arxiv:1902.10845 v1 · 2019-02-28 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2E3B6NTFQ5VZAKNVOVD7UZNRH2}

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	2026-05-17T23:49:01.776683Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1361f3665876b9029b57547fa65b13e960ba85bca9ecb3b2b625232684f9832

Aliases

arxiv: 1902.10845 · arxiv_version: 1902.10845v1 · doi: 10.48550/arxiv.1902.10845 · pith_short_12: 2E3B6NTFQ5VZ · pith_short_16: 2E3B6NTFQ5VZAKNV · pith_short_8: 2E3B6NTF

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/2E3B6NTFQ5VZAKNVOVD7UZNRH2 \
  | 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: d1361f3665876b9029b57547fa65b13e960ba85bca9ecb3b2b625232684f9832

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b254ea019576bd08cf20ca9e3e18d6cb0e54ad09bd659af73f7b4e135c4b08a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-02-28T00:35:31Z",
    "title_canon_sha256": "917b5ecccecf7c4363cb0dd1fc3ffeda5afb5d422d23683c22f4e8ebb40aaaa9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.10845",
    "kind": "arxiv",
    "version": 1
  }
}