NTT/EMMI Exposure Times

Date of last modification: Mar 27 2008, 1:30 pm chilean time.

 
                     Supernovae  (sorted by local time of observation)


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Name           spectr.         Priority         RA          DEC             Comments
                             (1 is highest)        (2000.0)
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SN 2007on      3x400             3          03 38 50.90  -35 34 30.0
SN 2008M       3x600             1.5        06 21 41.28	 -59 43 45.4
SN 2008C       3x900             2          06 57 11.53  +20 26 13.7    
SN 2008O       3x1200            3          06 57 34.46	 -45 48 44.3
SN 2006jd      3x1200            3          08 02 07.43  +00 48 31.5
SN 2008bi      3x400             1          08 35 53.39  +00 42 23.1       Needs classification!
SN 2008W       3x600             1.5        08 36 19.22	 -20 16 52.5
SN 2008bh      3x600             1          08 40 46.15  -04 07 09.3       CHASE SN
SN 2007sq      3x1200            3          08 47 16.13  -20 01 27.6
SN 2008bc      3x600             1          09 38 31.23  -63 58 25.6       CHASE SN
SN 2008ae      3x1200            2          09 56 03.20	 +10 29 58.8       2002cx-like
SN 2008bd      3x900             2          10 18 23.32  -13 06 11.2       CHASE SN
SN 2008K       3x900             1          11 38 10.54  -23 25 36.1       
SN 2007sr      3x400             2          12 01 52.80  -18 58 21.7
SN 2008bf      3x600             1          12 04 02.90  +20 14 42.6
SN 2008ar      3x900             2          12 24 37.92  +10 50 17.4
SN 2008aq      3x600             1.5        12 50 30.42  -10 52 01.4
SN 2008aw      3x400             1          13 04 14.12  -10 19 12.3
SN 2007it      3x600             3          14 18 25.60  -43 22 54.0
SN 2008ag      3x600             1          18 39 52.38	 -67 25 59.0
SN 2008bk      3x120             1          23 57 47.50  -32 33 24.0       Needs classification!

                                 Galaxies that need redshift

None

2 - 3 Spectrophotometric standards with wide slit
One telluric standard with narrow (high s/n) and narrow slit.

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Airmass plot.

Note: For ACTIVE SNe 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. 

 Exposure times are only tentative and need to be adjusted according to obtained S/N.


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          Spectrophotometric Standard Stars

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Star         RA  (2000)  DEC     V        Time
                                         (sec)
----------------------------------------------------

LTT 377   00:41:46.6 -33:39:10 11.229     40
LTT 1020  01:54:49.7 -27:28:29 11.522     40
EG 21     03:10:30.4 -68:36:05 11.379     40
LTT 1788  03:48:22.2 -39:08:35 13.155     80 
LTT 2415  05:56:24.2 -27:51:26 12.214     60 
Hilt 600  06:45:13.5 +02:08:15 10.441     20
L745-46A  07:40:20.9 -17:24:42 13.0       80
LTT 3218  08:41:33.6 -32:56:55 11.858     40
LTT 3864  10:32:13.8 -35:37:42 12.171     40 
LTT 4364  11:45:36.6 -64:50:24 11.504     40
Feige 56  12:06:39.7 +11:40:39 11.057     40
LTT 4816  12:38:50.7 -49:47:58 13.794     80 
CD 32     14:11:46.3 -33:03:15 10.452     40
LTT 6248  15:38:59.8 -28:35:34 11.797     40
EG 274    16:23:33.7 -39:13:48 11.029     40
LTT 7379  18:36:26.2 -44:18:37 10.225     20
LTT 7987  20:10:57.1 -30:13:03 12.230     40 
LTT 9239  22:52:40.9 -20:35:27 12.068     40
Feige 110 23:19:58.3 -05:09:56 11.826     40
LTT 9491  23:19:35.2 -17:05:28 14.112    120 
----------------------------------------------------

  • A list of Spectrophotometric Standard Stars may be found here Standards for telluric features correction -------------------------------------------------------------- Star RA (2000) DEC V Time (sec) -------------------------------------------------------------- L745-46A 07:40:20.9 -17:24:42 13.0 200 DF,Bessell99 LTT 4364 11:45:36.6 -64:50:24 11.504 120 EG131 19:20:35.0 -07:40:00 12.28 180 Bessell99 NGC 7293 22:29:38.6 -20:50:14 13.5 240 PN central star LTT 9491 23:19:35.4 -17:05:28 14.1 300 DC,Bessell99 -------------------------------------------------------------- One telluric standard with narrow slit (followed by a comparison lamp). Click on the star name to get a finding chart.