Pith Number

pith:XBQRMBQG

pith:2009:XBQRMBQGNJQOAH5HAL2KNJ7VQZ

not attested not anchored not stored refs pending

Probing BH mass and accretion through X-ray variability in the CDFS

A. Comastri, C. Pinto, I. Papadakis, K. Iwasawa, M. Paolillo, P. Ranalli, V. Allevato

arxiv:0912.0152 v2 · 2009-12-01 · astro-ph.CO · 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{XBQRMBQGNJQOAH5HAL2KNJ7VQZ}

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	2026-05-18T02:10:35.165171Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b8611606066a60e01fa702f4a6a7f5865120bdde92e560f3761b737df018368f

Aliases

arxiv: 0912.0152 · arxiv_version: 0912.0152v2 · doi: 10.48550/arxiv.0912.0152 · pith_short_12: XBQRMBQGNJQO · pith_short_16: XBQRMBQGNJQOAH5H · pith_short_8: XBQRMBQG

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/XBQRMBQGNJQOAH5HAL2KNJ7VQZ \
  | 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: b8611606066a60e01fa702f4a6a7f5865120bdde92e560f3761b737df018368f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3dc1ed22897b87ba8a4fdd1ee8c0e52eb56a8d4a2a12207d084858127fe0cdc7",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-01T20:10:15Z",
    "title_canon_sha256": "62788bca2b6452b3ce63adc37fb723c5223a113e9e32310c4c4eaaf34b9c5f34"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.0152",
    "kind": "arxiv",
    "version": 2
  }
}