Pith Number

pith:M2KIGRVL

pith:2013:M2KIGRVLG7EFQIGLWHEYVRZGYF

not attested not anchored not stored refs pending

Cutoff in the hard X-ray spectra of the ultraluminous X-ray sources HoIX X-1 and M82 X-1

Alexander Lutovinov, Roman Krivonos, Sergey Sazonov

arxiv:1312.1777 v1 · 2013-12-06 · 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{M2KIGRVLG7EFQIGLWHEYVRZGYF}

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	2026-05-18T01:45:57.962964Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

66948346ab37c85820cbb1c98ac726c16261772468b3e161bf8345c3835f50fa

Aliases

arxiv: 1312.1777 · arxiv_version: 1312.1777v1 · doi: 10.48550/arxiv.1312.1777 · pith_short_12: M2KIGRVLG7EF · pith_short_16: M2KIGRVLG7EFQIGL · pith_short_8: M2KIGRVL

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/M2KIGRVLG7EFQIGLWHEYVRZGYF \
  | 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: 66948346ab37c85820cbb1c98ac726c16261772468b3e161bf8345c3835f50fa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "63dc38dd21eba28d7c7bc8c27ee08456cb41ff75960f1d1c0d444e4b815f868e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-12-06T06:06:29Z",
    "title_canon_sha256": "da7b938734004901ae0c2fdf3998d5388a507e3c74869bbcc17c1c047e35911c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.1777",
    "kind": "arxiv",
    "version": 1
  }
}