UNIVERSITY OF CALIFORNIA OBSERVATORIES / LICK OBSERVATORY
TRANSMISSION TABLESFOR OUR U, B, V, R, I,AND Rs FILTERS

The transmission values given here were read off by eye (not ours) from spectrophotometer tracings. We do not guarantee their accuracy. The notation "na" means that no readable values are available at the given wavelength. Red leaks are given in a separate table.

The BVRI filters were made according to the prescription given by Bessel (PASP 1990, 102, 1181), and are intended to transform well to the Johnson-Cousins system when used with CCDs. The Rs is the Spinrad night-sky suppression filter, discussed in detail by Djorgovskii (PASP, 1985, 97, 1119. Calibration of the Lick Red CCD Bandpasses).

The U filter transmission table was generated from the digitized transmission plot.


AngstromsUBVRIRs
3000-.01----
31000.015.01----
32000.140.01----
33000.347.01----
34000.440.01----
35000.625.01----
36000.685.02----
37000.708.09----
38000.643.25----
39000.458.40----
40000.170.51----
41000.029.58----
4200-.63----
4300-.66----
4400-.66----
4500-.63----
4600-.58----
4700-.47.01---
4800-.33.02---
4900-.19.38---
5000-.10.79---
5100-.04.88---
5200-.01.88---
5300--.85---
5400--.79.01--
5500--.72.02--
5600--.61.15--
5700--.50.47--
5800--.37.71-.01
5900--.24.73-.03
6000--.15.72-.15
6100--.09.71-.55
6200--.05.68-.74
6300--.02.64-.79
6400---.59-.84
6500---.54.01.89
6600---.49na.89
6700---.44na.88
6800---.39na.89
6900---.34na.89
7000---.29.02.85
7100---.24na.75
7200---.21na.73
7300---.15na.84
7400---.12na.69
7500---.11.68.65
7600---nanana
7700---nanana
7800---nana.01
7900---nanana
note change of wavelength scale here
8000---.03.85-
8500----.83-
9000----.79-
9500----.75-
10000----.66-
10500----.45-
11000----.25-
11500----.07-
12000----.02-


Red Leaks
In the small table below, the first line underneath the filter name is the approximate start of that filter's red leak in microns. The second line is the approximate peak strength of the red leak on the same scale as used in the main table below.
BVRIRs
1.41.4none
shown
1.551.0
3239none
shown
3285