Pith Number

pith:TJPFEE52

pith:2009:TJPFEE52GJMDWZFUWZI7F5J5JK

not attested not anchored not stored refs pending

Galaxies probing galaxies: cool halo gas from a z = 0.47 post-starburst galaxy

(2) Steward Observatory), Andrew C. Phillips (1), Benjamin J. Weiner (2) ((1) UCO/Lick Observatory, David C. Koo (1), J. Xavier Prochaska (1), Kate H. R. Rubin (1)

arxiv:0907.0231 v1 · 2009-07-01 · 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{TJPFEE52GJMDWZFUWZI7F5J5JK}

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	2026-05-18T04:29:42.549624Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9a5e5213ba32583b64b4b651f2f53d4a957f28dbac1bca4507fe320264ee69d0

Aliases

arxiv: 0907.0231 · arxiv_version: 0907.0231v1 · doi: 10.48550/arxiv.0907.0231 · pith_short_12: TJPFEE52GJMD · pith_short_16: TJPFEE52GJMDWZFU · pith_short_8: TJPFEE52

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/TJPFEE52GJMDWZFUWZI7F5J5JK \
  | 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: 9a5e5213ba32583b64b4b651f2f53d4a957f28dbac1bca4507fe320264ee69d0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "361a6ca54f2e2fb75f3f0119c4a76cfac50ef9624d471a6b0f664c7d95a6bc9c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-07-01T20:00:12Z",
    "title_canon_sha256": "51b9e29437258b9aa1a3f7d311de1f477810b7549d855dc4b07dccbaa0006fd0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.0231",
    "kind": "arxiv",
    "version": 1
  }
}