Pith Number

pith:4YWHEZNC

pith:2002:4YWHEZNC5OPWSAFAGCAFNN72JX

not attested not anchored not stored refs pending

The Chandra Deep Field-North Survey and the Cosmic X-ray Background

A.E. Hornschemeier (PSU), D.M. Alexander, F.E. Bauer, W.N. Brandt

arxiv:astro-ph/0202311 v1 · 2002-02-16 · 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{4YWHEZNC5OPWSAFAGCAFNN72JX}

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	2026-07-04T16:29:25.155226Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e62c7265a2eb9f6900a0308056b7fa4dcf30a66e52543521a34a5d2be35f0f26

Aliases

arxiv: astro-ph/0202311 · arxiv_version: astro-ph/0202311v1 · doi: 10.48550/arxiv.astro-ph/0202311 · pith_short_12: 4YWHEZNC5OPW · pith_short_16: 4YWHEZNC5OPWSAFA · pith_short_8: 4YWHEZNC

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/4YWHEZNC5OPWSAFAGCAFNN72JX \
  | 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: e62c7265a2eb9f6900a0308056b7fa4dcf30a66e52543521a34a5d2be35f0f26

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "836ddf1302d5318a01983a1446494009e7f1f9366dd1ff2f9b11ace0cf72fffa",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-02-16T03:31:48Z",
    "title_canon_sha256": "9fd14505390466891b7ff55c6422d3e8974772259224492c47a5c79a638a384c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0202311",
    "kind": "arxiv",
    "version": 1
  }
}