Pith Number

pith:L2HI7BMS

pith:2009:L2HI7BMSJUKQG6E7E7C6ZLT6SN

not attested not anchored not stored refs pending

Quantifying Quasar Variability As Part of a General Approach To Classifying Continuously Varying Sources

2), (2) Center for Cosmology, (3) The OGLE collaboration, 4), (4) Institute of Astronomy, 5), (5) Universidad de Concepcion, AstroParticle Physics, A. Udalski (3), Chile), Christopher S. Kochanek (1, Departamento de Fisica, G. Pietrzynski (3, I. Soszynski (3), K. Ulaczyk (3), L. Wyrzykowski (3, M. K. Szymanski (3), M. Kubiak (3), O. Szewczyk (3, Poland, R. Poleski (3) ((1) Department of Astronomy, Szymon Kozlowski (1), The Ohio State University, UK, University of Cambridge, USA, Warsaw University Observatory

arxiv:0909.1326 v2 · 2009-09-07 · 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{L2HI7BMSJUKQG6E7E7C6ZLT6SN}

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.

Cited by

2 papers in Pith

Constraining Orbital Eccentricity of a Supermassive Black Hole Binary Candidate PKS 2131-0211

A Disappearing Act: Constraints From "Missing" Flares of Repeating Partial TDE Candidates

Receipt and verification

First computed	2026-05-18T02:34:30.856300Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5e8e8f85924d1503789f27c5ecae7e937a7650bdae77b8f418ded50e0fd14843

Aliases

arxiv: 0909.1326 · arxiv_version: 0909.1326v2 · doi: 10.48550/arxiv.0909.1326 · pith_short_12: L2HI7BMSJUKQ · pith_short_16: L2HI7BMSJUKQG6E7 · pith_short_8: L2HI7BMS

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/L2HI7BMSJUKQG6E7E7C6ZLT6SN \
  | 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: 5e8e8f85924d1503789f27c5ecae7e937a7650bdae77b8f418ded50e0fd14843

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dec3ead4b375e5ed56ad63ba0dfa158ceed3c8e3b9be774d7edadc33effa2aba",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-07T20:05:17Z",
    "title_canon_sha256": "5fc0011a44f5750582d4a95285310b9e345d33c5db2b323093b17a099c586995"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1326",
    "kind": "arxiv",
    "version": 2
  }
}