Pith Number

pith:PUMDQL7X

pith:2018:PUMDQL7XNXKABQ2EZOSWUZBMH6

not attested not anchored not stored refs pending

A simple method to determine the time delays in presence of microlensing: application to HE 0435-1223 and PG1115+080

L.A.Berdina, V.M.Shulga, V.S.Tsvetkova

arxiv:1802.02620 v1 · 2018-02-07 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PUMDQL7XNXKABQ2EZOSWUZBMH6}

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	2026-05-18T00:24:03.539218Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d18382ff76dd400c344cba56a642c3fba62c229a57d42974b12091584d53b4d

Aliases

arxiv: 1802.02620 · arxiv_version: 1802.02620v1 · doi: 10.48550/arxiv.1802.02620 · pith_short_12: PUMDQL7XNXKA · pith_short_16: PUMDQL7XNXKABQ2E · pith_short_8: PUMDQL7X

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/PUMDQL7XNXKABQ2EZOSWUZBMH6 \
  | 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: 7d18382ff76dd400c344cba56a642c3fba62c229a57d42974b12091584d53b4d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e80955fbbacd71089ad7dac5e7c9f633f9d65e1d96eed1f6fcfb1179ad381052",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-02-07T20:05:03Z",
    "title_canon_sha256": "3c306244aa82927c79c8a0c1077ff56ae58d3dfbd6204472cfe8d003c1c1c0ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.02620",
    "kind": "arxiv",
    "version": 1
  }
}