Pith Number

pith:XK77TEIW

pith:2024:XK77TEIWBX5IXC2A7SMYMFH4ZK

not attested not anchored not stored refs pending

Multi-wavelength spectroscopic analysis of the ULX Holmberg II X-1 and its nebula suggests the presence of a heavy black hole accreting from a B-type donor

A. A. C. Sander, D. Pauli, D. R. Gies, E. Bozzo, H. Todt, J. M. Torrej\'on, J. Poutanen, L. Oskinova, R. Soria, S. Reyero Serantes, T. Bulik, V. M. G\'omez-Gonz\'alez, V. Ramachandran, W.-R. Hamann

arxiv:2409.12133 v2 · 2024-09-18 · astro-ph.HE · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XK77TEIWBX5IXC2A7SMYMFH4ZK}

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	2026-07-05T09:09:07.396824Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

babff991160dfa8b8b40fc998614fcca997b01b0fe642d1288e2d906b8e0330e

Aliases

arxiv: 2409.12133 · arxiv_version: 2409.12133v2 · doi: 10.48550/arxiv.2409.12133 · pith_short_12: XK77TEIWBX5I · pith_short_16: XK77TEIWBX5IXC2A · pith_short_8: XK77TEIW

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/XK77TEIWBX5IXC2A7SMYMFH4ZK \
  | 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: babff991160dfa8b8b40fc998614fcca997b01b0fe642d1288e2d906b8e0330e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "396ebf09b9a62acf84298361f2db734a31c545e075bb22e628ea774b0a96715b",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2024-09-18T16:55:00Z",
    "title_canon_sha256": "f28a46d4777a94e4f5152ccd14cad0f11fc46ef3d6892ee3399a97568b2b4d5d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2409.12133",
    "kind": "arxiv",
    "version": 2
  }
}