Pith Number

pith:R6E6PH5C

pith:2009:R6E6PH5CXYKD27EWNQPZWOFPCK

not attested not anchored not stored refs pending

Low metallicity natal environments and black hole masses in Ultraluminous X-ray Sources

L. Zampieri, T. P. Roberts

arxiv:0909.1017 v1 · 2009-09-05 · 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{R6E6PH5CXYKD27EWNQPZWOFPCK}

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	2026-05-18T02:11:59.473926Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f89e79fa2be143d7c966c1f9b38af129d42a6e594a7434607e3fa7d9452bc2e

Aliases

arxiv: 0909.1017 · arxiv_version: 0909.1017v1 · doi: 10.48550/arxiv.0909.1017 · pith_short_12: R6E6PH5CXYKD · pith_short_16: R6E6PH5CXYKD27EW · pith_short_8: R6E6PH5C

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/R6E6PH5CXYKD27EWNQPZWOFPCK \
  | 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: 8f89e79fa2be143d7c966c1f9b38af129d42a6e594a7434607e3fa7d9452bc2e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f988b6f640c54a37c1d8df91954b6f40330ea6547939f263b4178e60c58f9ec6",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-09-05T15:39:55Z",
    "title_canon_sha256": "e1dc507a37f601d1a00fc4579b849ed8989564f024645c17af003333a928d467"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1017",
    "kind": "arxiv",
    "version": 1
  }
}