Pith Number

pith:Y462DKRH

pith:2018:Y462DKRHR7JN5UR62LJYBKCKAI

not attested not anchored not stored refs pending

Probing Planets in Extragalactic Galaxies Using Quasar Microlensing

Eduardo Guerras (University of Oklahoma), Xinyu Dai

arxiv:1802.00049 v1 · 2018-01-31 · astro-ph.GA · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y462DKRHR7JN5UR62LJYBKCKAI}

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	2026-05-18T00:23:27.186788Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c73da1aa278fd2ded23ed2d380a84a0223d835c971acf520aa3627f4f09067a5

Aliases

arxiv: 1802.00049 · arxiv_version: 1802.00049v1 · doi: 10.48550/arxiv.1802.00049 · pith_short_12: Y462DKRHR7JN · pith_short_16: Y462DKRHR7JN5UR6 · pith_short_8: Y462DKRH

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/Y462DKRHR7JN5UR62LJYBKCKAI \
  | 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: c73da1aa278fd2ded23ed2d380a84a0223d835c971acf520aa3627f4f09067a5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7db1070e464abd4101002c70d43ef5f935e03947a198eee0950dc3b99b9fcf22",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-01-31T20:13:29Z",
    "title_canon_sha256": "bf1a31f7981f7320dfca50bc21f2e19c67b906aab4d7372e0f4fdf134932b972"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.00049",
    "kind": "arxiv",
    "version": 1
  }
}