Pith Number

pith:ZLR7FNEW

pith:1998:ZLR7FNEW3VKCWXGKFRWH3N24HS

not attested not anchored not stored refs pending

New HST Observations of High Velocity Lyman Alpha and Balmer Alpha in SNR 1987A

Alexei Fillippenko, Brian Schmidt, Cleas Fransson, C. S. J. Pun, Eli Michael, J. Craig Wheeler, Kazimierz Borkowski, Mark Phillips, Nicholas Suntzeff, Nino Panagia, Peter Challis, Peter Garnavich, Richard McCray, Robert P. Kirshner, Roger Chevalier

arxiv:astro-ph/9809138 v2 · 1998-09-10 · 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{ZLR7FNEW3VKCWXGKFRWH3N24HS}

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	2026-05-18T01:40:13.710189Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cae3f2b496dd542b5cca2c6c7db75c3cb779dabf2d25d89d779dbcf99148fd4b

Aliases

arxiv: astro-ph/9809138 · arxiv_version: astro-ph/9809138v2 · doi: 10.48550/arxiv.astro-ph/9809138 · pith_short_12: ZLR7FNEW3VKC · pith_short_16: ZLR7FNEW3VKCWXGK · pith_short_8: ZLR7FNEW

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/ZLR7FNEW3VKCWXGKFRWH3N24HS \
  | 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: cae3f2b496dd542b5cca2c6c7db75c3cb779dabf2d25d89d779dbcf99148fd4b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7e9313909a541cf35bea48fdca06f2fff9cb737b4eb20ad7837ba466b95ac7e9",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-09-10T17:00:22Z",
    "title_canon_sha256": "42c5bd4d4c7779b1170ce949ce2353e5b9babd028f0f7debe5396f64e610a45f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9809138",
    "kind": "arxiv",
    "version": 2
  }
}