Pith Number

pith:H46A4CPS

pith:2010:H46A4CPSH6T4T564Q3ZCL55FXN

not attested not anchored not stored refs pending

Constraints on Quasar Lifetimes and Beaming from the HeII Lyman-alpha Forest

Adam Lidz (Penn), Steven Furlanetto (UCLA)

arxiv:1008.4609 v1 · 2010-08-26 · 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{H46A4CPSH6T4T564Q3ZCL55FXN}

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	2026-05-18T02:05:42.238779Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f3c0e09f23fa7c9f7dc86f225f7a5bb7ec64af1380fba3acad5a6f486340c70

Aliases

arxiv: 1008.4609 · arxiv_version: 1008.4609v1 · doi: 10.48550/arxiv.1008.4609 · pith_short_12: H46A4CPSH6T4 · pith_short_16: H46A4CPSH6T4T564 · pith_short_8: H46A4CPS

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/H46A4CPSH6T4T564Q3ZCL55FXN \
  | 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: 3f3c0e09f23fa7c9f7dc86f225f7a5bb7ec64af1380fba3acad5a6f486340c70

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "20dd0341f4b15cc311db9254c97c953c87486718ca89f205b68e389e1d21e1b6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-08-26T22:02:22Z",
    "title_canon_sha256": "d40a3f00b39f7fcde605763087362b8f0aef055313fa01267e8d590820ec0179"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.4609",
    "kind": "arxiv",
    "version": 1
  }
}