Pith Number

pith:XSKDKGGU

pith:2011:XSKDKGGUV6XJEPWVP4SUENIBKX

not attested not anchored not stored refs pending

The End of Helium Reionization at z~2.7 Inferred from Cosmic Variance in HST/COS HeII Lyman Alpha Absorption Spectra

(2) University of California Berkeley, (3) Astrophysikalisches Institut Potsdam, (4) Universit\"at Potsdam, (5) Max-Planck-Institut f\"ur Astronomie, (6) Hamburger Sternwarte/Universit\"at Hamburg), Aldo Dall'Aglio (3), Cora Fechner (4), Dieter Reimers (6), G\'abor Worseck (1), Joseph F. Hennawi (5), J. Xavier Prochaska (1), Lutz Wisotzki (3) ((1) UCO/Lick Observatory at University of California Santa Cruz, Matthew McQuinn (2), Philipp Richter (4)

arxiv:1103.5752 v2 · 2011-03-29 · 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{XSKDKGGUV6XJEPWVP4SUENIBKX}

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	2026-05-18T04:22:21.751928Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc943518d4afae923ed57f2542350155ca7550e4595e51fbedea6a46030ef0bd

Aliases

arxiv: 1103.5752 · arxiv_version: 1103.5752v2 · doi: 10.48550/arxiv.1103.5752 · pith_short_12: XSKDKGGUV6XJ · pith_short_16: XSKDKGGUV6XJEPWV · pith_short_8: XSKDKGGU

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/XSKDKGGUV6XJEPWVP4SUENIBKX \
  | 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: bc943518d4afae923ed57f2542350155ca7550e4595e51fbedea6a46030ef0bd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "81c1748be19e1e9a6dbf699c0a3a1b014f8eb0f271b6b6f5d5854137e17ef151",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-03-29T20:01:15Z",
    "title_canon_sha256": "066504da6cb96bcc0f7e69c7fa6443a2cc3c101a0e53a543ec62c4254cb7fbc2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.5752",
    "kind": "arxiv",
    "version": 2
  }
}