Pith Number

pith:DYGNECRA

pith:2013:DYGNECRAMLNPJPXKT55L7WTNKZ

not attested not anchored not stored refs pending

The Structure of the X-ray and Optical Emitting Regions of the Lensed Quasar Q 2237+0305

A. M. Mosquera, B. Chen, C. S. Kochanek, G. Chartas, J. A. Blackburne, X. Dai

arxiv:1301.5009 v1 · 2013-01-21 · 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{DYGNECRAMLNPJPXKT55L7WTNKZ}

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	2026-05-18T01:52:04.922187Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1e0cd20a2062daf4beea9f7abfda6d564605fb29119c4b972d6362529bcc1f85

Aliases

arxiv: 1301.5009 · arxiv_version: 1301.5009v1 · doi: 10.48550/arxiv.1301.5009 · pith_short_12: DYGNECRAMLNP · pith_short_16: DYGNECRAMLNPJPXK · pith_short_8: DYGNECRA

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/DYGNECRAMLNPJPXKT55L7WTNKZ \
  | 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: 1e0cd20a2062daf4beea9f7abfda6d564605fb29119c4b972d6362529bcc1f85

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f021fab3c32f927755910d63f7e678a2cd86f6f03599015dbed35b5d8cb806e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-01-21T21:24:06Z",
    "title_canon_sha256": "f2224664762711b5777b12614ff56dc75272c2067ac197580308437fbb88fe4c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.5009",
    "kind": "arxiv",
    "version": 1
  }
}