Pith Number

pith:JNF7AWF7

pith:2006:JNF7AWF7AH52FQE2M4HQC5PVCG

not attested not anchored not stored refs pending

Spectral shape of the UV ionizing background and HeII absorption at redshifts 1.8 < z < 2.9

A. Songaila, C. Fechner, D. Reimers, D. Tytler, I. I. Agafonova, R. A. Simcoe, S. A. Levshakov

arxiv:astro-ph/0610442 v1 · 2006-10-14 · 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{JNF7AWF7AH52FQE2M4HQC5PVCG}

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	2026-07-04T16:59:32.064172Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4b4bf058bf01fba2c09a670f0175f511a4e30450f9672d98d750a296b33eee50

Aliases

arxiv: astro-ph/0610442 · arxiv_version: astro-ph/0610442v1 · doi: 10.48550/arxiv.astro-ph/0610442 · pith_short_12: JNF7AWF7AH52 · pith_short_16: JNF7AWF7AH52FQE2 · pith_short_8: JNF7AWF7

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/JNF7AWF7AH52FQE2M4HQC5PVCG \
  | 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: 4b4bf058bf01fba2c09a670f0175f511a4e30450f9672d98d750a296b33eee50

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7dd1ef401b6a83896ed7c1207efdbf0ece723e79fc7ad46aa635027a427fc1af",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-10-14T13:22:46Z",
    "title_canon_sha256": "cb898643767b8ae4e8542937e2dce9a23a1879c8fd20dfdc6abde9f59e607f0c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0610442",
    "kind": "arxiv",
    "version": 1
  }
}