Pith Number

pith:C7NLJ7PT

pith:2009:C7NLJ7PTW45OHW7JR6VEV6OVHW

not attested not anchored not stored refs pending

Extraplanar Dust in Spiral Galaxies: Tracing Outflows in the Disk-Halo Interface

J. Christopher Howk (U. Notre Dame)

arxiv:0904.4928 v1 · 2009-04-30 · 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{C7NLJ7PTW45OHW7JR6VEV6OVHW}

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	2026-05-18T02:13:48.646856Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

17dab4fdf3b73ae3dbe98faa4af9d53db7b5482196cfd6954e0e2e13acc52455

Aliases

arxiv: 0904.4928 · arxiv_version: 0904.4928v1 · doi: 10.48550/arxiv.0904.4928 · pith_short_12: C7NLJ7PTW45O · pith_short_16: C7NLJ7PTW45OHW7J · pith_short_8: C7NLJ7PT

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/C7NLJ7PTW45OHW7JR6VEV6OVHW \
  | 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: 17dab4fdf3b73ae3dbe98faa4af9d53db7b5482196cfd6954e0e2e13acc52455

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "84b38b48c2591c0a67c91e47032c471b438e9831f832cd5a3f5ff5107bebbfb7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-30T19:51:53Z",
    "title_canon_sha256": "f655700997a7573a7fd0578de6ace5ec89d2480a30ea6714bbacf26b1446935f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4928",
    "kind": "arxiv",
    "version": 1
  }
}