Pith Number

pith:SMEFK64Y

pith:2014:SMEFK64YRIFYCEF5O3WY4VFZF3

not attested not anchored not stored refs pending

Swift J1357.2-0933: the faintest black hole?

J. Casares, M. Armas Padilla, N. Degenaar, R. P. Fender, R. Wijnands, T. Mu\~noz-Darias

arxiv:1404.2134 v2 · 2014-04-08 · astro-ph.HE

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SMEFK64YRIFYCEF5O3WY4VFZF3}

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	2026-05-18T01:43:36.484700Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9308557b988a0b8110bd76ed8e54b92ef39f1e4f4f57bc099bbe36cdc420c4f5

Aliases

arxiv: 1404.2134 · arxiv_version: 1404.2134v2 · doi: 10.48550/arxiv.1404.2134 · pith_short_12: SMEFK64YRIFY · pith_short_16: SMEFK64YRIFYCEF5 · pith_short_8: SMEFK64Y

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/SMEFK64YRIFYCEF5O3WY4VFZF3 \
  | 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: 9308557b988a0b8110bd76ed8e54b92ef39f1e4f4f57bc099bbe36cdc420c4f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80caa8ce137da684f007347021059fc22479a8cdf2c0d0a41db7aa23efab32c3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2014-04-08T13:59:32Z",
    "title_canon_sha256": "3f235a7d02987470213871eb13a0affa123acc587d17d21c2d3e2daa84459933"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.2134",
    "kind": "arxiv",
    "version": 2
  }
}