Pith Number

pith:EHBTAPLP

pith:2002:EHBTAPLPUBZ5CQLBUXVKR5NGSH

not attested not anchored not stored refs pending

A New Feature in the Interstellar Extinction Curve at 2700 A: Diamonds in the Rough?

Adolf N. Witt, D.C.B. Whittet, F. Salama, Geoffrey C. Clayton, Karl D. Gordon, L.J. Allamandola, Michael J. Wolff, Peter G. Martin, T. P. Snow, Tracy L. Smith

arxiv:astro-ph/0204476 v3 · 2002-04-27 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EHBTAPLPUBZ5CQLBUXVKR5NGSH}

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	2026-07-04T14:11:59.878304Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21c3303d6fa073d14161a5eaa8f5a691ded6869409e70b04a8c6dd0b382be3b2

Aliases

arxiv: astro-ph/0204476 · arxiv_version: astro-ph/0204476v3 · doi: 10.48550/arxiv.astro-ph/0204476 · pith_short_12: EHBTAPLPUBZ5 · pith_short_16: EHBTAPLPUBZ5CQLB · pith_short_8: EHBTAPLP

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/EHBTAPLPUBZ5CQLBUXVKR5NGSH \
  | 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: 21c3303d6fa073d14161a5eaa8f5a691ded6869409e70b04a8c6dd0b382be3b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "31b5f7319baa16981562353aa86ddd14db1c20f93d62a150586a8f469b387cc8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-04-27T19:13:31Z",
    "title_canon_sha256": "60022b1886d478896d3338a841cbc0cbdf063dda3e7bff83765bcab008e4fb7d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0204476",
    "kind": "arxiv",
    "version": 3
  }
}