Pith Number

pith:U475GNFJ

pith:2011:U475GNFJDSFRTAANCXPGXZWKG4

not attested not anchored not stored refs pending

The Chandra X-Ray Optics

Martin C. Weisskopf

arxiv:1110.4020 v2 · 2011-10-18 · 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{U475GNFJDSFRTAANCXPGXZWKG4}

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	2026-05-18T02:00:09.207085Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a73fd334a91c8b19800d15de6be6ca371e8e78f7e8fe8fc2d271b156ca8a37f0

Aliases

arxiv: 1110.4020 · arxiv_version: 1110.4020v2 · doi: 10.48550/arxiv.1110.4020 · pith_short_12: U475GNFJDSFR · pith_short_16: U475GNFJDSFRTAAN · pith_short_8: U475GNFJ

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/U475GNFJDSFRTAANCXPGXZWKG4 \
  | 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: a73fd334a91c8b19800d15de6be6ca371e8e78f7e8fe8fc2d271b156ca8a37f0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "91eab3b2f531609bfdeaaec2d2377faae9ca236cd0f01d7b1f12239a86e6138b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/publicdomain/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2011-10-18T15:16:51Z",
    "title_canon_sha256": "246a9447445b2f7d9db3c80cc7632a53aaf607f0fb5d38bbdf6ac24013aa1756"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.4020",
    "kind": "arxiv",
    "version": 2
  }
}