Pith Number

pith:HVYZRDQU

pith:2003:HVYZRDQU5ZJNXZUAP57UICJKIL

not attested not anchored not stored refs pending

Optical Counterpart of The Ultraluminous X-ray Source NGC 1313 X-2

A. Treves, L. Zampieri, M. Chieregato, P. Kaaret, P. Mucciarelli, R. Di Stefano, R. Falomo, R. Turolla

arxiv:astro-ph/0309687 v1 · 2003-09-25 · 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{HVYZRDQU5ZJNXZUAP57UICJKIL}

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	2026-07-04T16:51:45.338111Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3d71988e14ee52dbe6807f7f44092a42c03c61f0ace80df308837273556fa8e1

Aliases

arxiv: astro-ph/0309687 · arxiv_version: astro-ph/0309687v1 · doi: 10.48550/arxiv.astro-ph/0309687 · pith_short_12: HVYZRDQU5ZJN · pith_short_16: HVYZRDQU5ZJNXZUA · pith_short_8: HVYZRDQU

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/HVYZRDQU5ZJNXZUAP57UICJKIL \
  | 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: 3d71988e14ee52dbe6807f7f44092a42c03c61f0ace80df308837273556fa8e1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "93e7a848ee8ca40c1bf0db2367abceb2e9659cc9e091dd25c93339ebe5d069bb",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-09-25T09:30:39Z",
    "title_canon_sha256": "9eac888376624ecacab8fbf7209b9edbd982d42db5b550348b0d1b6373da12f0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0309687",
    "kind": "arxiv",
    "version": 1
  }
}