Pith Number

pith:RGOGH4EJ

pith:2016:RGOGH4EJZ66JIUBRIZPBQG5HF5

not attested not anchored not stored refs pending

Hamburger Sternwarte plate archives: Historic long-term variability study of active galaxies based on digitized photographic plates

D. Groote, D. Horns, J.H.M.M. Schmitt, M. Wertz, S. Czesla, T. Tuvikene

arxiv:1607.00312 v1 · 2016-07-01 · astro-ph.IM · 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{RGOGH4EJZ66JIUBRIZPBQG5HF5}

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	2026-05-18T00:44:47.627594Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

899c63f089cfbc945031465e181ba72f512e462dbd09871e9e3079ef9b2d3d8f

Aliases

arxiv: 1607.00312 · arxiv_version: 1607.00312v1 · doi: 10.48550/arxiv.1607.00312 · pith_short_12: RGOGH4EJZ66J · pith_short_16: RGOGH4EJZ66JIUBR · pith_short_8: RGOGH4EJ

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/RGOGH4EJZ66JIUBRIZPBQG5HF5 \
  | 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: 899c63f089cfbc945031465e181ba72f512e462dbd09871e9e3079ef9b2d3d8f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ed37b45a565a3c03c92e551cd5f7c246f2b41b0b15c39fc04a9083c46ecda368",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2016-07-01T16:47:58Z",
    "title_canon_sha256": "1189114642c7dd6fb0cb1cb43bd6fc68a1ed5eab57c199e4fbe3b6df674df67b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1607.00312",
    "kind": "arxiv",
    "version": 1
  }
}