Pith Number

pith:XPXRTCGY

pith:1999:XPXRTCGYEDS4JQTC3BQMIVGFUA

not attested not anchored not stored refs pending

EXIST: A High Sensitivity Hard X-ray Imaging Sky Survey Mission for ISS

A. Fabian, B. Ramsey, C. Hailey, D. Chakrabarty, D. Hartmann, F. Fiore, F. Harrison, G. Skinner, J. Grindlay, L. Bildsten, M. Elvis, N. Gehrels, R. Rothschild, S. Woosley, T. Prince

arxiv:astro-ph/9912394 v1 · 1999-12-18 · 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{XPXRTCGYEDS4JQTC3BQMIVGFUA}

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	2026-07-04T15:49:51.457354Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bbef1988d820e5c4c262d860c454c5a03923d7a767d3662d9498ba7f9cac67de

Aliases

arxiv: astro-ph/9912394 · arxiv_version: astro-ph/9912394v1 · doi: 10.48550/arxiv.astro-ph/9912394 · pith_short_12: XPXRTCGYEDS4 · pith_short_16: XPXRTCGYEDS4JQTC · pith_short_8: XPXRTCGY

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/XPXRTCGYEDS4JQTC3BQMIVGFUA \
  | 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: bbef1988d820e5c4c262d860c454c5a03923d7a767d3662d9498ba7f9cac67de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b39442d161a37a8e405a89e45cbbb7dd2dfc8f5117e9ceefa1741a58b490d14",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-12-18T00:42:14Z",
    "title_canon_sha256": "32f91a31369c34a3e8efdd6044cd363b1bfbc34c2640d3916b960e9b1b4e442d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9912394",
    "kind": "arxiv",
    "version": 1
  }
}