Pith Number

pith:H25XK4K4

pith:1999:H25XK4K422OH2RSBOB4IG7VCZ7

not attested not anchored not stored refs pending

Variable Spin-down in the Soft Gamma Repeater SGR 1900+14 and Correlations with Burst Activity

Christopher Thompson, Chryssa Kouveliotou, Jan van Paradijs, Jean Swank, Kevin Hurley, Mark H. Finger, Peter M. Woods, Robert C. Duncan, Tod Strohmayer, Toshio Murakami

arxiv:astro-ph/9907173 v1 · 1999-07-13 · 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{H25XK4K422OH2RSBOB4IG7VCZ7}

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	2026-07-04T16:11:25.385129Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ebb75715cd69c7d46417078837ea2cfe704100b49dc033d27ab90c0ccd5e348

Aliases

arxiv: astro-ph/9907173 · arxiv_version: astro-ph/9907173v1 · doi: 10.48550/arxiv.astro-ph/9907173 · pith_short_12: H25XK4K422OH · pith_short_16: H25XK4K422OH2RSB · pith_short_8: H25XK4K4

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/H25XK4K422OH2RSBOB4IG7VCZ7 \
  | 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: 3ebb75715cd69c7d46417078837ea2cfe704100b49dc033d27ab90c0ccd5e348

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e33ce044ef6c43cad11205179c1e1400b908ed50a6a3be73276f72374445f66e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-07-13T20:56:25Z",
    "title_canon_sha256": "0e5a73a0bb8b6756c2eb83d9d19d2caa9a6329ed33db1c35beb05254b9244f09"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9907173",
    "kind": "arxiv",
    "version": 1
  }
}