Pith Number

pith:EXQOOOBF

pith:2007:EXQOOOBFY6LNNG6AQDXZ7JCAM5

not attested not anchored not stored refs pending

On Black Hole Mass Estimation from X-ray Spectra of Ultraluminous X-ray Sources

Ken-Ya Watarai, Kiki Vierdayanti, Shin Mineshige

arxiv:0712.1857 v2 · 2007-12-12 · 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{EXQOOOBFY6LNNG6AQDXZ7JCAM5}

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	2026-05-18T02:16:08.601243Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25e0e73825c796d69bc080ef9fa44067794a687a05a88fef48879a9a76347720

Aliases

arxiv: 0712.1857 · arxiv_version: 0712.1857v2 · doi: 10.48550/arxiv.0712.1857 · pith_short_12: EXQOOOBFY6LN · pith_short_16: EXQOOOBFY6LNNG6A · pith_short_8: EXQOOOBF

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/EXQOOOBFY6LNNG6AQDXZ7JCAM5 \
  | 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: 25e0e73825c796d69bc080ef9fa44067794a687a05a88fef48879a9a76347720

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ba4066d0ae1c4941a5f5db8f5c3ae9bd4439e0ff3d82aff9d539c45c1a5a6e8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-12-12T02:24:25Z",
    "title_canon_sha256": "55a1b979993f7d52dcf36411d546f1bfe16b5306c29a8479b44ae1b544653f0a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0712.1857",
    "kind": "arxiv",
    "version": 2
  }
}