Pith Number

pith:GFRLDP7I

pith:2026:GFRLDP7IWG2LAT4B5CWMA3RIHF

not attested not anchored not stored refs pending

A Colour-colour Fingerprint Links the UV Upturn in Early-type Galaxies to Second-generation Stars from Dissolved Globular Clusters

(2) Institute of astrophysics, Andrea Bellini (1), Paul Goudfrooij (1), P. Universidad Catolica de Chile), Thomas H. Puzia (2) ((1) Space Telescope Science Institute, Thomas M. Brown (1)

arxiv:2606.07751 v1 · 2026-06-05 · astro-ph.GA · 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{GFRLDP7IWG2LAT4B5CWMA3RIHF}

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	2026-06-09T01:04:51.089592Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3162b1bfe8b1b4b04f81e8acc06e283953afcda3cc9159a71191fbe95389f5cc

Aliases

arxiv: 2606.07751 · arxiv_version: 2606.07751v1 · doi: 10.48550/arxiv.2606.07751 · pith_short_12: GFRLDP7IWG2L · pith_short_16: GFRLDP7IWG2LAT4B · pith_short_8: GFRLDP7I

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/GFRLDP7IWG2LAT4B5CWMA3RIHF \
  | 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: 3162b1bfe8b1b4b04f81e8acc06e283953afcda3cc9159a71191fbe95389f5cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c434eb66c66f9a3850835ac597a9050ff07fc040d605d9c0221786d738e250ec",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-06-05T18:01:02Z",
    "title_canon_sha256": "a832f65e86b8256ea10b3b7ba7bddf7248d7d0fa072c58fd53f9905a88b5531b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.07751",
    "kind": "arxiv",
    "version": 1
  }
}