Pith Number

pith:PZ262K7T

pith:2018:PZ262K7TGAJOX3NQIXBDOTNKEU

not attested not anchored not stored refs pending

Variability of Red Supergiants in M31 from the Palomar Transient Factory

Abhijit Saha, Evan B. Bauer, Frank Masci, Lars Bildsten, Marat Gilfanov, Maria R. Drout, Monika D. Soraisam, Russ R. Laher, Shrinivas R. Kulkarni, Thomas A. Prince, Thomas Kupfer, Thomas Matheson

arxiv:1803.09934 v1 · 2018-03-27 · astro-ph.SR · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

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	2026-05-18T00:14:08.017832Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e75ed2bf33012ebedb045c2374daa252aebeba8fe157fbc3e302972e02ba1b6

Aliases

arxiv: 1803.09934 · arxiv_version: 1803.09934v1 · doi: 10.48550/arxiv.1803.09934 · pith_short_12: PZ262K7TGAJO · pith_short_16: PZ262K7TGAJOX3NQ · pith_short_8: PZ262K7T

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/PZ262K7TGAJOX3NQIXBDOTNKEU \
  | 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: 7e75ed2bf33012ebedb045c2374daa252aebeba8fe157fbc3e302972e02ba1b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11c4fbd80039c9e1bc84c8feb85206267ad0f13ccdc036186e4c572cf1b75fa4",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-03-27T07:26:39Z",
    "title_canon_sha256": "2e3900044a5d188ad56fda269fea01cfb7f746e21d5c57602629b39c7c557e07"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.09934",
    "kind": "arxiv",
    "version": 1
  }
}