MI/IMACS Exposure Times
Date of last modification: Mar. 28 2011 07:45 pm Chilean time.
IMACS-f/4, grating 300/4.3
Supernovae
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Name spectr. imaging Priority RA DEC V Comments
(1 is highest) (2000.0)
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SN2010kg 2 04 40 08.7 +07 20 54. 18.5
SN2006is-host 1 05:17:34.37 -23:46:54.2 redshift
SN2010jr 1 05 19 34.47 -32 39 14.6 19.0
SN2010ko 3 05 32 49.4 -14 05 45 18.0 Joe
SN2010kw 1 06 56 19.88 -54 03 47.1 19.0 classification
SN2010hg 2 09:46:13.7 -30:27:13.3 18.5
SN2010ev 2 10:25:28.99 -39:49:51.2 ? BVg'r'i' imaging
PSNJ11352709-3800549 3 11:35:27.09 -38:00:54.9 16.5 classification, Joe
cand_pgc37739 3 11:58:55.30 -53:23:56.22 17.5 classification, Joe
SN2010cn 2 11 04 06.57 +04 49 58.7 17.6 BVg'r'i' imaging
SN2011am 1 12:16:26.00 -43:19:20.0 15.0
SN2011A 1 13:01:01.19 -14:31:34.8 18.7 600l/mm? u'g'B imaging
SN2011Z 1 13:30:43.038 -20:57:13.97 16.0 u' imaging only
PSNJ13490323-2803596 1 13:49:03.23 -28:03:59.65 17.0 classification Joe
SN2010as 2 15 49 49.23 -29 23 09.7 ? BVg'r'i' imaging
SN2010gp 3 16:52:57.39 +02:23:16.4 ? BVg'r'i' imaging
PSNJ18593846-4145558 1 18:59:38.46 -41:45:55.8 17.6 classification
2 - 3 Spectrophotometric standards with wide slit
One telluric standard with narrow (high s/n) slit.
The observer should check the signal-to-noise obtained and decide about
exposure times and/or take 2 instead of 3 exposures per target.
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Standard Stars
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Star RA (2000) DEC V Time
(sec)
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LTT 377 00:41:46.6 -33:39:10 11.229 60
LTT 1020 01:54:49.7 -27:28:29 11.522 60
EG 21 03:10:30.4 -68:36:05 11.379 60
LTT 1788 03:48:22.2 -39:08:35 13.155 150
LTT 2415 05:56:24.2 -27:51:26 12.214 80
Hilt 600 06:45:13.5 +02:08:15 10.441 40
LTT 3218 08:41:33.6 -32:56:55 11.858 60
LTT 3864 10:32:13.8 -35:37:42 12.171 80
LTT 4364 11:45:50.0 -64:50:30 11.504 60
Feige 56 12:06:39.7 +11:40:39 11.057 60
LTT 4816 12:38:50.7 -49:47:58 13.794 150
CD 32 14:11:46.3 -33:03:15 10.452 40
LTT 6248 15:38:59.8 -28:35:34 11.797 70
EG 274 16:23:33.7 -39:13:48 11.029 60
LTT 7379 18:36:26.2 -44:18:37 10.225 30
LTT 7987 20:10:57.1 -30:13:03 12.230 80
LTT 9239 22:52:40.9 -20:35:27 12.068 70
Feige 110 23:19:58.3 -05:09:56 11.826 70
LTT 9491 23:19:35.2 -17:05:28 14.112 150
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A list of Spectrophotometric Standard Stars may be found here
Standards for telluric features correction
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Star RA (2000) DEC V Time
(sec)
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L745-46A 07:40:20.9 -17:24:42 13.0 250 DF,Bessell99
LTT 4364 11:45:50.0 -64:50:30 11.504 150
EG131 19:20:35.0 -07:40:00 12.28 200 Bessell99
NGC 7293 22:29:38.6 -20:50:14 13.5 180 PN central star
LTT 9491 23:19:35.4 -17:05:28 14.1 400 DC,Bessell99
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One telluric standard with narrow slit (followed by a comparison lamp).
Click on the star name to get a finding chart.
Note: In general, we should orient the slit along the paralactic angle. However,
if the SN is located close to the host it might be necessary to pick a different
and more convenient angle to avoid contamination of the host. If so, it would
be convenient to observe the SN at a low airmass.
The finding charts can be
found HERE and/or HERE.
