Pith Number

pith:2SUSDZCM

pith:2019:2SUSDZCMC7XMIV4WHZ6JJUHTGD

not attested not anchored not stored refs pending

Interstellar Dust Grains: Ultraviolet and Mid-IR Extinction Curves

Adolf Witt, Benne Holwerda, Christopher Clark, Geoffrey Clayton, Julia Roman-Duval, Karl D. Gordon, Karl Misselt, Lea Hagen, Michael Wolff, Yvonne Pendleton

arxiv:1903.09995 v1 · 2019-03-24 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2SUSDZCMC7XMIV4WHZ6JJUHTGD}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-17T23:50:34.816519Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4a921e44c17eec457963e7c94d0f330cfe0a4c609dad011423b92d40d9ec510

Aliases

arxiv: 1903.09995 · arxiv_version: 1903.09995v1 · doi: 10.48550/arxiv.1903.09995 · pith_short_12: 2SUSDZCMC7XM · pith_short_16: 2SUSDZCMC7XMIV4W · pith_short_8: 2SUSDZCM

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/2SUSDZCMC7XMIV4WHZ6JJUHTGD \
  | 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: d4a921e44c17eec457963e7c94d0f330cfe0a4c609dad011423b92d40d9ec510

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7e5f6a7abdb376c6eb192760dc32924bb4871ca118bdaffd7e991cfd8c05685c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-03-24T14:45:02Z",
    "title_canon_sha256": "80d5aff3243334d009d9c3ea1632153ab161e569f826cb1149a90c5f40e6187d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.09995",
    "kind": "arxiv",
    "version": 1
  }
}