Pith Number

pith:4Y4MXW22

pith:2014:4Y4MXW22KMBG562CAY3VKBWJOF

not attested not anchored not stored refs pending

Spitzer/IRAC Observations of the Variability of Sgr A* and the Object G2 at 4.5 microns

A. Ghez, E. E. Becklin, G. G. Fazio, G. Witzel, H. A. Smith, J. Ingalls, J. L. Hora, L. Meyer, M. L. N. Ashby, M. R. Morris, S. Carey, S. P. Willner

arxiv:1408.1951 v1 · 2014-08-08 · astro-ph.HE

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	2026-05-18T01:42:22.375019Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e638cbdb5a53026efb4206375506c97171a4aecb2a504a85812ed7d4e64472c0

Aliases

arxiv: 1408.1951 · arxiv_version: 1408.1951v1 · doi: 10.48550/arxiv.1408.1951 · pith_short_12: 4Y4MXW22KMBG · pith_short_16: 4Y4MXW22KMBG562C · pith_short_8: 4Y4MXW22

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/4Y4MXW22KMBG562CAY3VKBWJOF \
  | 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: e638cbdb5a53026efb4206375506c97171a4aecb2a504a85812ed7d4e64472c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd9369783b87aacc57eec9e4f241de555c8f2d15641c5ded95aa04a6db885791",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2014-08-08T19:57:43Z",
    "title_canon_sha256": "e763c13d11749f0a9d943c2cf236f5ca742baaad24f8a97f970b64caa8722a41"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.1951",
    "kind": "arxiv",
    "version": 1
  }
}