Pith Number

pith:A5GNULTK

pith:2009:A5GNULTKOFCFFTTATR5HPNE3JH

not attested not anchored not stored refs pending

A long-term optical and X-ray ephemeris of the polar EK Ursae Majoris

(2) Max-Planck-Gymnasium, (3) Felix-Klein-Gymnasium, (4) Astrophysikalisches Institut Potsdam, A.D. Schwope (4), A. Ploch (2), F.V. Hessman ((1) Institut fuer Astrophysik, Germany, Germany), Goeqttingen, Goettingen, J. Diese (2), J. Zachmann (2), K. Beuermann (1), Potsdam, S. Paik (3)

arxiv:0911.1270 v1 · 2009-11-06 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{A5GNULTKOFCFFTTATR5HPNE3JH}

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	2026-05-18T02:10:58.741590Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

074cda2e6a714452ce609c7a77b49b49ee3f1946488eda97cbb8f6e7c40f93f3

Aliases

arxiv: 0911.1270 · arxiv_version: 0911.1270v1 · doi: 10.48550/arxiv.0911.1270 · pith_short_12: A5GNULTKOFCF · pith_short_16: A5GNULTKOFCFFTTA · pith_short_8: A5GNULTK

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/A5GNULTKOFCFFTTATR5HPNE3JH \
  | 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: 074cda2e6a714452ce609c7a77b49b49ee3f1946488eda97cbb8f6e7c40f93f3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b04321d1483a446630dd8cc07727ac7540ceaf4051496c3308dc0591131a66b2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-11-06T14:49:28Z",
    "title_canon_sha256": "325fa900b34ecf90296cdd50efb073b73b2334393685322ad66ff69938a8d4f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.1270",
    "kind": "arxiv",
    "version": 1
  }
}