Pith Number

pith:FNKFFFQM

pith:2026:FNKFFFQMMVT2HY5D644POETI5I

not attested not anchored not stored refs pending

XMM-Newton and Swift Unveil Another X-Ray Transient in NGC 4945, XMM J130514.64-493311.27

Jenna M. Cann, Kimberly A. Weaver, Miranda McCarthy, Murray Brightman, Ryan W. Pfeifle

arxiv:2607.21587 v1 · 2026-07-23 · 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{FNKFFFQMMVT2HY5D644POETI5I}

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	2026-07-24T01:24:41.600423Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2b5452960c6567a3e3a3f738f71268ea27b36acfe387abdb8c3b5d68ecf0c73f

Aliases

arxiv: 2607.21587 · arxiv_version: 2607.21587v1 · doi: 10.48550/arxiv.2607.21587 · pith_short_12: FNKFFFQMMVT2 · pith_short_16: FNKFFFQMMVT2HY5D · pith_short_8: FNKFFFQM

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/FNKFFFQMMVT2HY5D644POETI5I \
  | 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: 2b5452960c6567a3e3a3f738f71268ea27b36acfe387abdb8c3b5d68ecf0c73f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8fadac48c2ff0c783d18f156efdf7d129654fa4f33e415c67743ccd0eef84965",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-07-23T17:57:52Z",
    "title_canon_sha256": "524e8fba54f7ae5388a5e1f0ecba1c4e60d2d53935f70f566eeb80bdbad4ec5f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.21587",
    "kind": "arxiv",
    "version": 1
  }
}