[
  {
    "$project": {
      "cutoutScience": 0,
      "cutoutTemplate": 0,
      "cutoutDifference": 0
    }
  },
  {
    "$lookup": {
      "from": "ZTF_alerts_aux",
      "localField": "objectId",
      "foreignField": "_id",
      "as": "aux"
    }
  },
  {
    "$project": {
      "cross_matches": {
        "$arrayElemAt": [
          "$aux.cross_matches",
          0
        ]
      },
      "prv_candidates": {
        "$filter": {
          "input": {
            "$arrayElemAt": [
              "$aux.prv_candidates",
              0
            ]
          },
          "as": "item",
          "cond": {
            "$and": [
              {
                "$in": [
                  "$$item.programid",
                  [
                    1,
                    2,
                    3
                  ]
                ]
              },
              {
                "$lt": [
                  {
                    "$subtract": [
                      "$candidate.jd",
                      "$$item.jd"
                    ]
                  },
                  100
                ]
              }
            ]
          }
        }
      },
      "schemavsn": 1,
      "publisher": 1,
      "objectId": 1,
      "candid": 1,
      "candidate": 1,
      "classifications": 1,
      "coordinates": 1
    }
  },
  {
    "$match": {
      "candidate.drb": {
        "$gt": 0.9999999
      },
      "cross_matches.Gaia_DR2.0": {
        "$exists": false
      }
    }
  },
  {
    "$project": {
      "_id": 0,
      "candid": 1,
      "objectId": 1,
      "annotations.author": "dd",
      "annotations.mean_rb": {
        "$avg": "$prv_candidates.rb"
      }
    }
  }
]