Pith Number

pith:UGUEITRF

pith:2015:UGUEITRFLAGWPHYH2FYMH6SVCH

not attested not anchored not stored refs pending

Deep HeII and CIV Spectroscopy of a Giant Lyman alpha Nebula: Dense Compact Gas Clumps in the Circumgalactic Medium of a z~2 Quasar

(2) UCO/Lick Observatory, 3) ((1) Max-Planck-Institut fur Astronomie, (3) ETH), Fabrizio Arrigoni Battaia (1), Joseph F. Hennawi (1), J. Xavier Prochaska (2), Sebastiano Cantalupo (2, UC Santa Cruz

arxiv:1504.03688 v1 · 2015-04-14 · astro-ph.GA · 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{UGUEITRFLAGWPHYH2FYMH6SVCH}

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	2026-05-18T01:33:43.539726Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1a8444e25580d679f07d170c3fa5511c01803d7e806aaf1f467589595ea340f

Aliases

arxiv: 1504.03688 · arxiv_version: 1504.03688v1 · doi: 10.48550/arxiv.1504.03688 · pith_short_12: UGUEITRFLAGW · pith_short_16: UGUEITRFLAGWPHYH · pith_short_8: UGUEITRF

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/UGUEITRFLAGWPHYH2FYMH6SVCH \
  | 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: a1a8444e25580d679f07d170c3fa5511c01803d7e806aaf1f467589595ea340f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0125fdf076f012f0a3f6c7eed9c73625aa25be0e8820cd716b3bef87b38fbe96",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-04-14T20:00:54Z",
    "title_canon_sha256": "ae77c68170e351c8a6b5efdff33c948ca0738beab89d34f254877416f282f7aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.03688",
    "kind": "arxiv",
    "version": 1
  }
}