Pith Number

pith:QJDE2ZCB

pith:2011:QJDE2ZCBOSNJPPQOGE757M7U4Q

not attested not anchored not stored refs pending

X-rays and hard UV radiation From the First Galaxies: Ionization Bubbles and 21 cm Observations

Andrew J. Benson (Caltech), Aparna Venkatesan (University of San Francisco)

arxiv:1107.2993 v1 · 2011-07-15 · astro-ph.CO · 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{QJDE2ZCBOSNJPPQOGE757M7U4Q}

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	2026-05-18T02:01:16.487330Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

82464d6441749a97be0e313fdfb3f4e41c8fd6eb3efcc425e547e348bd140220

Aliases

arxiv: 1107.2993 · arxiv_version: 1107.2993v1 · doi: 10.48550/arxiv.1107.2993 · pith_short_12: QJDE2ZCBOSNJ · pith_short_16: QJDE2ZCBOSNJPPQO · pith_short_8: QJDE2ZCB

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/QJDE2ZCBOSNJPPQOGE757M7U4Q \
  | 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: 82464d6441749a97be0e313fdfb3f4e41c8fd6eb3efcc425e547e348bd140220

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea9c5c36b04da8b5ea0870e3b140d062021616ec7f9699d1a3e57618102a1055",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-07-15T05:06:13Z",
    "title_canon_sha256": "cd68532ac81e16d36b37532081de5a4d7364f5a7e70f630eb28eacb66b7e46cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.2993",
    "kind": "arxiv",
    "version": 1
  }
}