Pith Number

pith:YNL5E3M6

pith:1999:YNL5E3M6PPUMBK5CAYMALUSIMC

not attested not anchored not stored refs pending

The Environments of Supernovae in Post-Refurbishment Hubble Space Telescope Images

A.J. Barth, A.V. Filippenko, C.Y. Peng, S.D. Van Dyk

arxiv:astro-ph/9907252 v1 · 1999-07-19 · 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{YNL5E3M6PPUMBK5CAYMALUSIMC}

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	2026-07-04T16:11:26.585321Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c357d26d9e7be8c0aba2061805d24860b008f434e8ff748e430e279fc60fc6a5

Aliases

arxiv: astro-ph/9907252 · arxiv_version: astro-ph/9907252v1 · doi: 10.48550/arxiv.astro-ph/9907252 · pith_short_12: YNL5E3M6PPUM · pith_short_16: YNL5E3M6PPUMBK5C · pith_short_8: YNL5E3M6

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/YNL5E3M6PPUMBK5CAYMALUSIMC \
  | 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: c357d26d9e7be8c0aba2061805d24860b008f434e8ff748e430e279fc60fc6a5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "da4812ec4c247474e1d124624458be832a0a0f8d9506b5f3fccc170ab44cd9f5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-07-19T19:18:47Z",
    "title_canon_sha256": "77f859110053ff924246c3a383dcab8a5afca97048a5e68ec1af04a338a3a7cf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9907252",
    "kind": "arxiv",
    "version": 1
  }
}