Properties of SN candidate in cl1604+43:

Bright candidate:

Detected in February 1995 data-set. Absent in images from February 1994.
Appears on 16 x 2000 F814W images, taken over ~ 2 days.

Flux measurement:

Total exposure time 32000.
Total flux in object ~580 counts.
Flambda = (580/32000) x 2.5e-18 = 4.531e-20 [erg/(sec x cm2 x Ang)]
Fnu = Flambda x (lambda2 / c [Ang/sec]) = 9.522e-31 [erg/(sec cm2 Hz)] 
I814 = -2.5 log(Fnu) - 48.6 = 26.45

Coordinates:

position in HST frame (chip #3): (259, 69)

Cluster coordinates: R.A: 16 04 18 (2000) DEC: 43 04 36
Host Galaxy coordinates: 16 04 20.40 (2000) DEC: 43 04 41.0
SN offset from host: 2.85" North, 0.55" West
                         Host redshift: 0.985
                         Host type: Sb, Host Mag: 23.38
Reference: Postman, Lubin and Oke, 1998 AJ V.116 p.560 (# 019)

Faint Candidate:

Flux measurement:

Total exposure time 32000.
Total flux in object ~90 counts.
Flambda = (90/32000) x 2.5e-18 = 7.031e-21 [erg/(sec x cm2 x Ang)]
Fnu = Flambda x (lambda2 / c [Ang/sec]) = 1.553e-31 [erg/(sec cm2 Hz)] 
I814 = -2.5 log(Fnu) - 48.6 = 28.4

Coordinates:

position in HST frame (chip #3): (259, 69)

Cluster coordinates: R.A: 16 04 18 (2000) DEC: 43 04 36
Host Galaxy coordinates: 16 04 23.30 (2000) DEC: 43 03 55.0
SN offset from host: 1.41" North, 1.07" West
                         Host redshift: 0.496
                         Host type: S0, Host Mag: 24.04
Reference: Postman, Lubin and Oke, 1998 AJ V.116 p.560 (# 028)