HSC Filter Schedule
Last update: July 18, 2025 HST
S25B
| Run |
Filter |
| Continuation of S25A July run (until 8/04) |
g, i2, z, NB395, NB430, NB515 |
| August (8/18 – 9/02) |
g, r2, i2, z, NB816, NB872 |
| October (10/13 – 10/29) |
Early part: g, i2, z, NB395, NB430, NB515
Latter part: g, r2, i2, z, NB816, NB872 |
S25A
| Run |
Filter |
| February (2/19 – 3/06) |
Early part: g, r2, i2, z, Y, NB816
Latter part: g, i2, z, NB395, NB515, NB872 |
| April (4/21 – 5/06) |
Early part: g, r2, z, NB656, NB816, NB872
Latter part: g, r2, z, NB395, NB430, EB-gri |
| July (7/16 – 8/04) |
Early part: g, r2, i2, z, NB816, EB-gri
Latter part: g, i2, z, NB395, NB430, NB515 |
S24B
| Run |
Filter |
| August (7/29 – 8/06) |
g, r2, i2, z, EB-gri |
| September (9/24 – 10/07) |
g, r2, i2, z, NB395, NB515 |
| November (11/25 – 12/05) |
g, r2, i2, NB515, NB527, EB-gri |
| December (12/19 – 1/06) |
g, r2, z, NB816, NB872, NB926 |
S24A
| Run |
Filter |
| February (cancelled) |
g, r2, i2, z, NB816, NB872 |
| April (4/01 – 4/15) |
Early part: g, r2, i2, z, NB395, NB872
Latter part: r2, i2, z, NB656, NB718, NB816 |
| June (6/07 – 6/13) |
g, r2, i2, z, NB872, EB-gri |
| July (6/27 – 7/10) |
Early part: z, g, r2, i2, NB497, NB872
Latter part: g, i2, z, NB395, NB430, EB-gri |
S23B
| Run |
Filter |
| August (8/08 – 8/24) |
Early part: g, r2, i2, z, NB497, NB506
Latter part: g, r2, i2, z, NB816, NB872 |
| September (9/06 – 9/14) |
Early part: g, r2, i2, z, NB816, EB-gri
Latter part: g, r2, i2, z, NB497, NB515 |
| January (cancelled) |
Early part: g, r2, i2, z, NB718, NB872
Latter part: g, r2, i2, z, NB872, NB926 |
S23A
| Run |
Filter |
| March (3/15 – 3/28) |
Early part: g, r2, i2, z, NB921, EB-gri
Latter part: g, r2, i2, z, Y, NB497 |
| May (5/11 – 5/24) |
g, r2, i2, z, NB872, NB921 |
| June (6/15 – 6/21) |
g, r2, i2, z, Y, NB497 |
S22B
| Run |
Filter |
| October (10/18 – 10/31) |
Early part: g, r2, i2, NB816, NB921, EB-gri
Latter part: g, r2, i2, z, NB497, NB921 |
| January (01/12-01/26) |
Early part: g, r2, i2, z, NB506, NB515
Latter part: g, r2, z, NB391, NB395, NB718 |
S22A
| Run |
Filter |
| April (4/25 – 5/08) |
g, r2, i2, z, NB395, NB656 |
| May (5/25 – 6/07) |
g, r2, i2, z, NB656, NB718 |
| June (6/27 – 7/05) |
g, r2, i2, z, NB497, NB656 |
S21B
| Run |
Filter |
| September (08/30-09/07) |
g, r2, i2, Y, NB395, NB527 |
| October (09/30 – 10/11) |
g, r2, i2, z, Y, NB395 |
| November (10/27 – 11/09) |
g, r2, i2, z, Y, NB497 |
| December (11/30 – 12/09) |
g, r2, i2, z, Y, NB497 |
| January (12/28-01/03) |
z [FEU is not available] |
S21A
| Run |
Filter |
| February (2/04 – 2/18) |
g, r2, i2, z, Y, NB515 |
| March (cancelled) |
g, r2, i2, z, Y, NB515 |
| June (6/08 – 6/16) |
g, r2, i2, z, Y, NB527 |
| July (6/28 – 7/09) |
g, r2, i2, z, NB527, SH |
S20B
| Run |
Filter |
| August (08/11-08/25) |
g, r2, i2, z, Y, NB816 |
| October (10/08 – 10/22) |
g, r2, i2, z, Y, NB816 |
| November (11/09 – 11/19) |
g, r2, i2, z, Y, NB816 |
| December (12/07 – 12/21) |
g, r2, i2, z, Y, NB430 |
| January (01/06-01/18) |
g, r2, i2, z, Y, NB430 |
S20A
| Run |
Filter |
| February (2/18 – 3/02) |
g, r2, i2, z, Y, NB926 |
| March (3/18 – 3/30) |
g, r2, i2, z, Y, NB400 |
| April (cancelled) |
g, r2, i2, z, Y, NB816 |
| May (5/18 – 5/31) |
g, r2, i2, z, Y, NB921 |
| June (6/18 – 6/25) |
g, r2, i2, z, Y, NB816 |
S19B
| Run |
Filter |
| September (9/19 – 10/3) |
g, r2, i2, z, Y, SH → NB515 |
| October (10/22 – 11/4) |
g, r2, i2, z, Y, NB816 |
| November (11/19 – 12/3) |
g, r2, i2, z, Y, NB400 |
| December (12/19 – 1/2) |
g, r2, i2, z, Y, NB926 |
| January (1/16 – 1/29) |
g, r2, i2, z, Y, NB468 |
S19A
| Run |
Filter |
| February (1/29 – 2/13) |
g, r2, i2, z, Y, NB816 → SH |
| March (2/26 – 3/14) |
g, r2, i2, z, Y, NB387 |
| April (3/28 – 4/11) |
g, r2, i2, z, Y, NB816 |
| May (4/29 – 5/09) |
g, r2, i2, z, Y, NB921 |
| June (5/27 – 6/10) |
g, r2, i2, z, Y, NB527 |
S18B
| Run |
Filter |
| August (cancelled) |
g, r2, i2, z, Y, NB921 |
| September (cancelled) |
g, r2, i2, z, Y, NB527 → NB468 |
| October (cancelled) |
g, r2, i2, z, Y, NB527 |
| November (11/01 – 18) |
g, r2, i2, z, Y, NB921 |
| December (11/25 – 12/13) |
g, r2, i2, z, Y, NB921 → IB945 |
| January (12/27 – 1/10) |
g, r2, i2, z, Y, NB1010 |
S18A
| Run |
Filter |
| February (2/07 – 22) |
g, r, i, z, Y, NB101 |
| March (3/08 – 22) |
g, r, i, z, Y, NB527 |
| April (4/09 – 23) |
g, r, i, z, Y, NB816 |
| May (cancelled) |
g, r, i, z, Y, NB921 |
| June (cancelled) |
g, r, i, z, Y, SH |
S17B
| Run |
Filter |
| August (8/15 – 28) |
g, r, i, z, Y, NB816 |
| September (9/12 – 26) |
g, r, i, z, Y, NB926 |
| December (12/14 – 26) |
g, r, i, z, NB527, SH |
| January (1/08 – 23) |
g, r, i, z, Y, NB387 |
S17A
| Run |
Filter |
| early February (2/01 – 2/02) |
g, r, i, z, Y, NB973 |
| late February - early March (2/20 – 3/06) |
g, r, i, z, Y, NB718 |
| late March - early April (3/20 – 4/03) |
g, r, i, z, Y, NB718 |
| late April - early May (4/19 – 5/02) |
g, r, i, z, Y, NB921 |
| late June - early July (6/19 – 29) |
g, r, i, z, NB816, NB921 |
| late July (7/17 – 31) |
g, r, i, z, Y, NB387 |