Pith Number

pith:J7Q4MHBJ

pith:2015:J7Q4MHBJHHH3P625KLJGDVFY5V

not attested not anchored not stored refs pending

A variable ULX and possible IMBH candidate in M51a

Andrew D. Sutton, Chris Done, Dominic J. Walton, Fiona A. Harrison, George B. Lansbury, Hannah M. Earnshaw, Lucy M. Heil, Mar Mezcua, Matthew J. Middleton, Timothy P. Roberts

arxiv:1512.04825 v2 · 2015-12-15 · 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{J7Q4MHBJHHH3P625KLJGDVFY5V}

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	2026-05-18T01:22:57.283654Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4fe1c61c2939cfb7fb5d52d261d4b8ed7a31787ae1349b116affdd65203338dc

Aliases

arxiv: 1512.04825 · arxiv_version: 1512.04825v2 · doi: 10.48550/arxiv.1512.04825 · pith_short_12: J7Q4MHBJHHH3 · pith_short_16: J7Q4MHBJHHH3P625 · pith_short_8: J7Q4MHBJ

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/J7Q4MHBJHHH3P625KLJGDVFY5V \
  | 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: 4fe1c61c2939cfb7fb5d52d261d4b8ed7a31787ae1349b116affdd65203338dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee97da9cd2e912be64c72fa686d839f605243ae5ec09589ec75ef00384bfd8b5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2015-12-15T15:46:41Z",
    "title_canon_sha256": "5daf3752929acd4aa1d18589ff13c32802f41a7a226c63884b2668a17700356b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.04825",
    "kind": "arxiv",
    "version": 2
  }
}