Pith Number

pith:JFCZCHFW

pith:2002:JFCZCHFWB4JXCFBII6TXFJEUGC

not attested not anchored not stored refs pending

A feature at z ~ 3.2 in the evolution of the Ly-alpha forest optical depth

A. J. Connolly, D. E. Vanden Berk, D. G. York, D. P. Schneider, D. Q. Lamb, G. T. Richards, J. Brinkmann, J. Frieman, J. Schaye, M. Bernardi, M. Subbarao, R. K. Sheth, R. Nichol, S. Burles

arxiv:astro-ph/0206293 v2 · 2002-06-17 · 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{JFCZCHFWB4JXCFBII6TXFJEUGC}

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.

Cited by

1 paper in Pith

Machine Learning Techniques for Astrophysics and Cosmology: Lyman-$\alpha$ forest

Receipt and verification

First computed	2026-07-04T16:30:13.851786Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4945911cb60f1371142847a772a49430a01361f653c3f6eb80ee73e29bb3d09d

Aliases

arxiv: astro-ph/0206293 · arxiv_version: astro-ph/0206293v2 · doi: 10.48550/arxiv.astro-ph/0206293 · pith_short_12: JFCZCHFWB4JX · pith_short_16: JFCZCHFWB4JXCFBI · pith_short_8: JFCZCHFW

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/JFCZCHFWB4JXCFBII6TXFJEUGC \
  | 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: 4945911cb60f1371142847a772a49430a01361f653c3f6eb80ee73e29bb3d09d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "027421987ea0e31aadaf330cb2dfa0dd14b2b27bbbd977cbdb390922cef2db3e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-06-17T20:08:11Z",
    "title_canon_sha256": "50d4f3c62b9e63a62bd817e9372660fb6d6428dc082baf247b61d7fa389f7fab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0206293",
    "kind": "arxiv",
    "version": 2
  }
}