Pith Number

pith:FM4CXWXS

pith:2011:FM4CXWXS6DSFCWFPTZFCEKUKID

not attested not anchored not stored refs pending

A Hubble Space Telescope Study of Lyman Limit Systems: Census and Evolution

J. Christopher Howk, Joseph Ribaudo, Nicolas Lehner

arxiv:1105.0659 v1 · 2011-05-03 · 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{FM4CXWXS6DSFCWFPTZFCEKUKID}

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	2026-05-18T02:02:09.403460Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2b382bdaf2f0e45158af9e4a222a8a40e2293f346c6c79e14e762284a2681681

Aliases

arxiv: 1105.0659 · arxiv_version: 1105.0659v1 · doi: 10.48550/arxiv.1105.0659 · pith_short_12: FM4CXWXS6DSF · pith_short_16: FM4CXWXS6DSFCWFP · pith_short_8: FM4CXWXS

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/FM4CXWXS6DSFCWFPTZFCEKUKID \
  | 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: 2b382bdaf2f0e45158af9e4a222a8a40e2293f346c6c79e14e762284a2681681

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cc9cc4e16e1c12f66c93505da82ba0be392babc0eced5a6682081ce05401ce14",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-05-03T19:27:14Z",
    "title_canon_sha256": "ddf20f6a1c0e0a68da3392313d61f7d4c3622a2d64b1e73346e9b7abbb4ce7ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.0659",
    "kind": "arxiv",
    "version": 1
  }
}