Pith Number

pith:CAH4UCO4

pith:2016:CAH4UCO4YHIH3W7LKD3FTCMXGU

not attested not anchored not stored refs pending

Spectral analysis of four 'hypervariable' AGN: a microneedle in the haystack?

A. Bruce, A. Lawrence, C. Inserra, C. MacLeod, C. Waters, E. A. Magnier, J. Polshaw, J. S. Collinson, M. C. Lam, M. Elvis, M. J. Ward, N. Kaiser, P. J. Marshall, R. Kotak, R-P. Kudritzki, S. Gezari

arxiv:1608.06261 v2 · 2016-08-22 · astro-ph.HE · 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{CAH4UCO4YHIH3W7LKD3FTCMXGU}

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	2026-05-18T00:49:36.595482Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

100fca09dcc1d07ddbeb50f659899735085147e260752d216955a45db86254f5

Aliases

arxiv: 1608.06261 · arxiv_version: 1608.06261v2 · doi: 10.48550/arxiv.1608.06261 · pith_short_12: CAH4UCO4YHIH · pith_short_16: CAH4UCO4YHIH3W7L · pith_short_8: CAH4UCO4

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/CAH4UCO4YHIH3W7LKD3FTCMXGU \
  | 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: 100fca09dcc1d07ddbeb50f659899735085147e260752d216955a45db86254f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48fd3071c37a20007cc3c9fff7ed24b5912a6edc1c58400117bee526e2023d53",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2016-08-22T19:00:09Z",
    "title_canon_sha256": "853d3b8cd61a677bfd01b471c73024713050951eb7581e9acd765b53060000e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1608.06261",
    "kind": "arxiv",
    "version": 2
  }
}