Pith Number

pith:U4P4AE6T

pith:2007:U4P4AE6T527G7ST5UPF43XCDW3

not attested not anchored not stored refs pending

A Century of Cosmology: A Direct Precision Measurement of the Intergalactic Lyman-alpha Opacity at 2<z<4.2

(2) UCO/Lick Observatory), A. Lidz (1), C.-A. Faucher-Giguere (1), J. X. Prochaska (2), L. Hernquist (1), M. Zaldarriaga (1) ((1) Harvard University

arxiv:0710.4522 v1 · 2007-10-24 · 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{U4P4AE6T527G7ST5UPF43XCDW3}

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	2026-05-18T04:36:41.843186Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a71fc013d3eebe6fca7da3cbcddc43b6eb28bfd5bd722f4a9378294caef1f472

Aliases

arxiv: 0710.4522 · arxiv_version: 0710.4522v1 · doi: 10.48550/arxiv.0710.4522 · pith_short_12: U4P4AE6T527G · pith_short_16: U4P4AE6T527G7ST5 · pith_short_8: U4P4AE6T

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/U4P4AE6T527G7ST5UPF43XCDW3 \
  | 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: a71fc013d3eebe6fca7da3cbcddc43b6eb28bfd5bd722f4a9378294caef1f472

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2aa417ae651e8caa1e38555d179b0bc2d598e3dc8315979cca9ba06f15038c51",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-10-24T17:49:57Z",
    "title_canon_sha256": "d73a04e62016e74ed06cd9082e926f5a0f9c2d845a59d04fdead7b184acbdfe6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0710.4522",
    "kind": "arxiv",
    "version": 1
  }
}