Pith Number

pith:2E2L5EKS

pith:2003:2E2L5EKSUSDVUL522VHPVDUPIR

not attested not anchored not stored refs pending

Color-redshift Relations and Photometric Redshift Estimations of Quasars in Large Sky Surveys

Wei Zhang (PKU), Xue-Bing Wu (PKU), Xu Zhou (NAOC)

arxiv:astro-ph/0307418 v1 · 2003-07-24 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2E2L5EKSUSDVUL522VHPVDUPIR}

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	2026-05-18T02:40:26.977202Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d134be9152a4875a2fbad54efa8e8f445cee793828c9c28050d065316795b3ca

Aliases

arxiv: astro-ph/0307418 · arxiv_version: astro-ph/0307418v1 · doi: 10.48550/arxiv.astro-ph/0307418 · pith_short_12: 2E2L5EKSUSDV · pith_short_16: 2E2L5EKSUSDVUL52 · pith_short_8: 2E2L5EKS

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/2E2L5EKSUSDVUL522VHPVDUPIR \
  | 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: d134be9152a4875a2fbad54efa8e8f445cee793828c9c28050d065316795b3ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "849ff50112139e9854f1d992106bb95d113704189fa36401e20c2e21397fa826",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-07-24T09:33:40Z",
    "title_canon_sha256": "7405b24b6429121e8e3c90d3a0511dd7ab8c9ae3ccdcaf21c561460c557386b6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0307418",
    "kind": "arxiv",
    "version": 1
  }
}