Pith Number

pith:AY5SR2RV

pith:2009:AY5SR2RVDA2V6SJYEUZAYK5RRU

not attested not anchored not stored refs pending

Observing Neutral Hydrogen Above Redshift 6: The "Global" Perspective

Alan E. E. Rogers (MIT/Haystack), Jacqueline N. Hewitt (MIT), Judd D. Bowman (Caltech)

arxiv:0901.0570 v1 · 2009-01-05 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AY5SR2RVDA2V6SJYEUZAYK5RRU}

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	2026-05-18T04:07:54.418241Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

063b28ea3518355f493825320c2bb18d250e6cef275b57281528f379a1177c6b

Aliases

arxiv: 0901.0570 · arxiv_version: 0901.0570v1 · doi: 10.48550/arxiv.0901.0570 · pith_short_12: AY5SR2RVDA2V · pith_short_16: AY5SR2RVDA2V6SJY · pith_short_8: AY5SR2RV

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/AY5SR2RVDA2V6SJYEUZAYK5RRU \
  | 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: 063b28ea3518355f493825320c2bb18d250e6cef275b57281528f379a1177c6b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5ba9322047fd38e14dff5df51704340adcf81f74bf865f83cfc986f64f6297b7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-01-05T22:13:14Z",
    "title_canon_sha256": "64dfdeea9a8d308d80eb4cac6fb88fca1825fe1cd35a17d37356dfad7c74e509"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.0570",
    "kind": "arxiv",
    "version": 1
  }
}