HSC filters


NOTES:
  • The NB400 filter is newly opened from S19A.
  • If you want to use narrow-band filters, you may need to obtain an approval in advance from the filter developer team. See 'Contact addresses of user filters'. You need to explicitly describe that you have obtained an approval in your proposal.


The following tables list filters available for open use observation of the HSC, together with their sensitivites. The transmission curves measured at the center of filters are available as plots and ASCII lists in the respective columns.

You may need to consider

as well as transmission curves below for estimating more exact throughput of each filter.

Sensitivities listed are for a 5 sigma detection measured in a 2'' diameter aperture in 1 hour of integration, assuming good (0.5'') seeing, dark (New Moon), and clear sky (tranparency is 1.0). Please refer to the Exposure Time Calculator for sensitivities with other conditions.

Broad-band filters

Filter Sensitivity
(mag)
mag for
1 e-/s
Name center area-weighted mean
Plot ListPlotList
g 27.8 29.0
r2(1) 27.2 29.1
i2(2) 26.5 28.7
z 25.9 27.7
Y(3) 25.1 27.4
(r)(1) 27.2 29.0
(i)(2) 26.5 28.6

          Notes:
          (1) We replace the r-band filter to new one (HSC-r2) from Jul 28th 2016 (HST). We mainly used the previous r-band filter (HSC-r) till Jul 11th 2016 (HST). Please see "FILTER01" at the FITS header for checking which filter was used.
          (2) We replace the i-band filter to new one (HSC-i2) from Feb 2016. We mainly used the previous i-band filter (HSC-i) till Jan 2016. Please see "FILTER01" at the FITS header for checking which filter was used.
          (3) When you estimate a throughput of the Y band filter, you should consider the quantum efficiency of FDCCD, which is very low at >10000 Å.

Narrow-band filters

Filter Sensitivity
(mag)
mag for
1 e-/s
Open(1)
from
When is it available
without permission?(2)
Name center area-weighted mean
Plot ListPlotList
NB387 25.7 24.6 S16BS18A
NB400 26.0 25.4 S19AS20B
NB468 26.3 26.0 S16A S17B
NB515 26.2 25.9 S15AS16B
NB527 26.3 25.9 S16AS17B
NB656 25.8 26.1 S16AS16A(3)
NB718 25.8 25.9 S16BS18A
NB816 25.6 25.6 S15BS17A
NB921 25.4 25.7 S15AS16B
NB926 24.8 25.7 S17AS18B
IB945 24.8 26.4 S17AS18B
NB973 24.2 25.1 S17AS18B
NB1010 23.4 24.1 S18AS19B

          Notes:
          (1) For user filters, during the first three semesters (or 3 call for proposals) after it is open to the public, people who are interested in using the filters must obtain an approval in advance from the filter developping team (cf. filter policy).
          (2) If the semester is not passed, you must obtain an approval in advance from the filter developer team before you submit your proposal using these user filters. See 'Contact addresses of user filters. You need to explicitly describe that you have obtained an approval in your proposal.
          (3) The NB656 is produced by the HSC developer team as a common use filter. You can use the NB656 without obtaining permission from S16A, when it is opened.

Contact addresses of user filters (1) and Information for acknowledgement(2)

Filter PI Email Fund Fund number
NB387 Dr. Kazuhiro Shimasaku shimadaku_at_astron.s.u-tokyo.ac.jp JSPS Kakenhi Scientific Research (A) 23244022
NB400 Dr. Masami Ouchi ouchims_at_ircc.u-tokyo.ac.jp JSPS Kakenhi Scientific Research (A) 15H02064
NB468 Dr. Yuichi Matsuda yuichi.matsuda_at_nao.ac.jp JSPS Kakenhi Scientific Research (B) 25287043
NB515 Dr. Masashi Chiba chiba_at_astr.tohoku.ac.jp MEXT Kakenhi Scientific Research on Priority Areas 18072001
NB527 Dr. Ikuru Iwata iwata_at_naoj.org JSPS Kakenhi Scientific Research (A) 24244018
NB718, NB816 Dr. Yoshiaki Taniguchi tani_at_cosmos.phys.sci.ehime-u.ac.jp Ehime University
NB921, NB973 Dr. Masami Ouchi ouchims_at_ircc.u-tokyo.ac.jp JSPS Kakenhi Scientific Research (A) 23244025
NB926 Dr. Masao Hayashi masao.hayashi_at_nao.ac.jp JSPS Kakenhi Young Scientists (A) 26707006
IB945 Dr. Akio Inoue akinoue_at_las.osaka-sandai.ac.jp JSPS Kakenhi Young Scientists (A) 23684010
NB1010 Dr. Kazuhiro Shimasaku shimadaku_at_astron.s.u-tokyo.ac.jp Toray Science Foundation



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