Pith Number

pith:YHDGACF4

pith:2009:YHDGACF43UFY6CKOLJ5P4MFQPB

not attested not anchored not stored refs pending

A metallicity-spin temperature relation in damped Lyman-$\alpha$ systems

Alain Smette (2), Australia; (4) NCRA-TIFR, Chile; (3) ANU, Frank H. Briggs (3), India), Jayaram N. Chengalur (4) ((1) NRAO, Nissim Kanekar (1), USA; (2) ESO

arxiv:0909.2459 v1 · 2009-09-14 · 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{YHDGACF43UFY6CKOLJ5P4MFQPB}

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	2026-05-18T02:34:30.252200Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c1c66008bcdd0b8f094e5a7afe30b0786695908af130ac708b92cfbae6956d24

Aliases

arxiv: 0909.2459 · arxiv_version: 0909.2459v1 · doi: 10.48550/arxiv.0909.2459 · pith_short_12: YHDGACF43UFY · pith_short_16: YHDGACF43UFY6CKO · pith_short_8: YHDGACF4

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/YHDGACF43UFY6CKOLJ5P4MFQPB \
  | 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: c1c66008bcdd0b8f094e5a7afe30b0786695908af130ac708b92cfbae6956d24

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "62351abd5886ab269794e85ffb015b9429d5d93f019c9cd22e60f3c82fc1d126",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-14T01:47:20Z",
    "title_canon_sha256": "da2601c40bde54536068e855821ac21415142842cc9325b0a6ae377838c52fae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2459",
    "kind": "arxiv",
    "version": 1
  }
}