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 | 51/52 (98.08%) | 48/49 (97.96%) | 47/48 (97.92%) | 42/43 (97.67%) | 35/35 (100.00%) | 22/22 (100.00%) | 16/16 (100.00%) | 11/11 (100.00%) | 3/3 (100.00%) |
| March 2025 | 28/29 (96.55%) | 27/28 (96.43%) | 25/26 (96.15%) | 21/22 (95.45%) | 17/18 (94.44%) | 14/15 (93.33%) | 7/8 (87.50%) | 7/7 (100.00%) | 3/3 (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 | 40/40 (100.00%) | 35/35 (100.00%) | 29/29 (100.00%) | 25/25 (100.00%) | 21/21 (100.00%) | 15/15 (100.00%) | 10/10 (100.00%) | 5/5 (100.00%) | 2/2 (100.00%) |
| June 2025 | 48/48 (100.00%) | 46/46 (100.00%) | 42/42 (100.00%) | 33/33 (100.00%) | 24/24 (100.00%) | 14/14 (100.00%) | 10/10 (100.00%) | 4/4 (100.00%) | 4/4 (100.00%) |
| July 2025 | 36/36 (100.00%) | 35/35 (100.00%) | 33/33 (100.00%) | 26/26 (100.00%) | 17/17 (100.00%) | 12/12 (100.00%) | 11/11 (100.00%) | 6/6 (100.00%) | 5/5 (100.00%) |
| August 2025 | 56/57 (98.25%) | 54/55 (98.18%) | 50/51 (98.04%) | 42/42 (100.00%) | 33/33 (100.00%) | 21/21 (100.00%) | 14/14 (100.00%) | 9/9 (100.00%) | 5/5 (100.00%) |
| September 2025 | 37/41 (90.24%) | 36/40 (90.00%) | 28/31 (90.32%) | 20/23 (86.96%) | 17/19 (89.47%) | 14/16 (87.50%) | 8/9 (88.89%) | 5/5 (100.00%) | 2/2 (100.00%) |
| October 2025 | 41/43 (95.35%) | 37/39 (94.87%) | 33/34 (97.06%) | 31/31 (100.00%) | 24/24 (100.00%) | 15/15 (100.00%) | 9/9 (100.00%) | 4/4 (100.00%) | 2/2 (100.00%) |
| November 2025 | 24/25 (96.00%) | 22/23 (95.65%) | 19/20 (95.00%) | 13/14 (92.86%) | 9/9 (100.00%) | 5/5 (100.00%) | 4/4 (100.00%) | 2/2 (100.00%) | 2/2 (100.00%) |
| December 2025 | 51/52 (98.08%) | 46/47 (97.87%) | 42/43 (97.67%) | 34/34 (100.00%) | 30/30 (100.00%) | 20/20 (100.00%) | 14/14 (100.00%) | 10/10 (100.00%) | 7/7 (100.00%) |
| January 2026 | 16/28 (57.14%) | 16/25 (64.00%) | 16/22 (72.73%) | 14/18 (77.78%) | 10/11 (90.91%) | 9/9 (100.00%) | 6/6 (100.00%) | 5/5 (100.00%) | 2/2 (100.00%) |
| Total | 451/474 (95.15%) | 425/445 (95.51%) | 385/400 (96.25%) | 317/327 (96.94%) | 250/254 (98.43%) | 172/175 (98.29%) | 116/118 (98.31%) | 71/71 (100.00%) | 39/39 (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.