Pith Number

pith:IJD6U3RX

pith:1996:IJD6U3RX2DIQ3FMEN3P3LN3GDW

not attested not anchored not stored refs pending

Circumstellar H-alpha from SN 1994D and future Type Ia supernovae: an observational test of progenitor models

D.L. King, L.J. Smith, M. Pettini, P. Lundqvist, R.J. Cumming

arxiv:astro-ph/9610020 v1 · 1996-10-03 · 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{IJD6U3RX2DIQ3FMEN3P3LN3GDW}

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	2026-05-18T01:40:19.143006Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4247ea6e37d0d10d95846edfb5b7661da8e5d009848cf1b5164440ff53cf4f66

Aliases

arxiv: astro-ph/9610020 · arxiv_version: astro-ph/9610020v1 · doi: 10.48550/arxiv.astro-ph/9610020 · pith_short_12: IJD6U3RX2DIQ · pith_short_16: IJD6U3RX2DIQ3FME · pith_short_8: IJD6U3RX

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/IJD6U3RX2DIQ3FMEN3P3LN3GDW \
  | 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: 4247ea6e37d0d10d95846edfb5b7661da8e5d009848cf1b5164440ff53cf4f66

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "05e7a07150f5d5455b4054c1b825e5cac75497c901e5a38d70f5235c525af091",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1996-10-03T11:09:03Z",
    "title_canon_sha256": "c46781dc2aeb47b456c3bf1f76220210588b79c23c67abc91bfa8acf044de189"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9610020",
    "kind": "arxiv",
    "version": 1
  }
}