CATS150 is a volume-limited supernova sample. We attempt to save and classify all local (<150 Mpc / z<0.0331) SN found in the ZTF alert stream. We try to save transients with a physical seperation less than 30 kpc from their associated NED LVS host galaxy (for z>0.01) or with a visible association with the host galaxy (for z<0.01).
Figure 1. Cumulative completeness for all saved CATS150 sources as a function of apparent magnitude. The sources used are filtered to be brighter than -10 in absolute magnitude (this removes some non-SN sources such as nearby classical novae).
Table 1. Classification success statistics by limiting magnitude for sources within the CATS150 volume.
| Peak app. mag | ≤ 20.0 | ≤ 19.5 | ≤ 19.0 | ≤ 18.5 | ≤ 18.0 | ≤ 17.5 | ≤ 17.0 | ≤ 16.5 | ≤ 16.0 |
|---|---|---|---|---|---|---|---|---|---|
| January 2025 | 2/2 (100.00%) | 2/2 (100.00%) | 2/2 (100.00%) | 1/1 (100.00%) | 1/1 (100.00%) | 1/1 (100.00%) | 1/1 (100.00%) | -- | -- |
| February 2025 | 52/53 (98.11%) | 49/50 (98.00%) | 48/49 (97.96%) | 43/44 (97.73%) | 36/36 (100.00%) | 23/23 (100.00%) | 17/17 (100.00%) | 11/11 (100.00%) | 2/2 (100.00%) |
| March 2025 | 27/29 (93.10%) | 26/28 (92.86%) | 24/26 (92.31%) | 20/22 (90.91%) | 17/18 (94.44%) | 14/15 (93.33%) | 7/8 (87.50%) | 6/6 (100.00%) | 2/2 (100.00%) |
| April 2025 | 21/21 (100.00%) | 21/21 (100.00%) | 19/19 (100.00%) | 15/15 (100.00%) | 12/12 (100.00%) | 10/10 (100.00%) | 6/6 (100.00%) | 3/3 (100.00%) | 2/2 (100.00%) |
| May 2025 | 17/23 (73.91%) | 16/20 (80.00%) | 14/18 (77.78%) | 12/16 (75.00%) | 7/10 (70.00%) | 6/7 (85.71%) | 3/3 (100.00%) | -- | -- |
| Total | 119/128 (92.97%) | 114/121 (94.21%) | 107/114 (93.86%) | 91/98 (92.86%) | 73/77 (94.81%) | 54/56 (96.43%) | 34/35 (97.14%) | 20/20 (100.00%) | 6/6 (100.00%) |
Figure 2. NED LVS Host galaxy separation for all saved CATS150 sources as a function of Date saved.
Figure 3. Peak Apparent Magnitude for all saved CATS150 sources as a function of Date saved.
Figure 4. Peak Absolute Magnitude for all saved CATS150 sources as a function of Date saved.