Pith Number

pith:NBPOOS4G

pith:2009:NBPOOS4GMWNPMADK64NAUFDXNP

not attested not anchored not stored refs pending

The Effects of the Ionizing Radiation Background on Galaxy Evolution

D. Clay Hambrick, Jeremiah P. Ostriker (Princeton University), Peter H. Johansson (University Observatory Munich), Thorsten Naab

arxiv:0909.0276 v1 · 2009-09-01 · 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{NBPOOS4GMWNPMADK64NAUFDXNP}

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	2026-05-18T02:34:36.843430Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

685ee74b86659af6006af71a0a14776be929afddb81449f6c3aa679bb20ba5aa

Aliases

arxiv: 0909.0276 · arxiv_version: 0909.0276v1 · doi: 10.48550/arxiv.0909.0276 · pith_short_12: NBPOOS4GMWNP · pith_short_16: NBPOOS4GMWNPMADK · pith_short_8: NBPOOS4G

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/NBPOOS4GMWNPMADK64NAUFDXNP \
  | 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: 685ee74b86659af6006af71a0a14776be929afddb81449f6c3aa679bb20ba5aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "44ca93656e84c3f6f403da143d315d69086d430b3ba1a00e19fd5ae1fc8c683d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-09-01T20:22:47Z",
    "title_canon_sha256": "295305f65c0bf140eda018edfc7ae60081d84d12e6cd4d9bb2ed1fdbfbdb3e1c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.0276",
    "kind": "arxiv",
    "version": 1
  }
}