Pith Number

pith:POHDOIHW

pith:2009:POHDOIHW3PP5TOKDBHR2WSTFAN

not attested not anchored not stored refs pending

Ionized Gas in the Smith Cloud

Alex S. Hill, L. Matthew Haffner, Ronald J. Reynolds

arxiv:0901.0712 v1 · 2009-01-06 · 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{POHDOIHW3PP5TOKDBHR2WSTFAN}

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	2026-05-18T03:44:58.076065Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b8e3720f6dbdfd9b94309e3ab4a65034f6ae655c8e616135ada6d143ac30c7c

Aliases

arxiv: 0901.0712 · arxiv_version: 0901.0712v1 · doi: 10.48550/arxiv.0901.0712 · pith_short_12: POHDOIHW3PP5 · pith_short_16: POHDOIHW3PP5TOKD · pith_short_8: POHDOIHW

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/POHDOIHW3PP5TOKDBHR2WSTFAN \
  | 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: 7b8e3720f6dbdfd9b94309e3ab4a65034f6ae655c8e616135ada6d143ac30c7c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de46b4ed4f27f13a8b33dbfe9c011ea9a6a49d7b1caab94dd5429026a5ff76f0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-01-06T21:01:01Z",
    "title_canon_sha256": "2d249a7bfd9baf260c26cd04fd79812264b7af46d782c15de65cfe3a44a5dfbd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.0712",
    "kind": "arxiv",
    "version": 1
  }
}