Pith Number

pith:SS3FXQBC

pith:2025:SS3FXQBCYQC3EHCNHPF2YVVYJJ

not attested not anchored not stored refs pending

How probable is the Lyman-$\alpha$ damping wing in the spectrum of the redshift z = 5.9896 quasar ULAS J0148+0600?

Ewald Puchwein, Fiona Sawyer, George D. Becker, Girish Kulkarni, James S. Bolton, Laura Keating, Luke Conaboy, Martin G. Haehnelt

arxiv:2502.03085 v3 · 2025-02-05 · 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{SS3FXQBCYQC3EHCNHPF2YVVYJJ}

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	2026-07-05T11:11:40.594624Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

94b65bc022c405b21c4d3bcbac56b84a4183059c6bdb52ca743aa35f7c1ca57d

Aliases

arxiv: 2502.03085 · arxiv_version: 2502.03085v3 · doi: 10.48550/arxiv.2502.03085 · pith_short_12: SS3FXQBCYQC3 · pith_short_16: SS3FXQBCYQC3EHCN · pith_short_8: SS3FXQBC

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/SS3FXQBCYQC3EHCNHPF2YVVYJJ \
  | 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: 94b65bc022c405b21c4d3bcbac56b84a4183059c6bdb52ca743aa35f7c1ca57d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3433865ceb0ad1b9ceb8f128476cc5b04bdeb895583cc7e5f2094aab6f8bc095",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2025-02-05T11:24:33Z",
    "title_canon_sha256": "4f3ecf567baef1ec0f4444c9b7848f5507f5dce6af9a88c979e4bb6ad941b05e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2502.03085",
    "kind": "arxiv",
    "version": 3
  }
}