Magellan/LDSS3 Exposure Times

Date of last modification: Apr 30 2009, 5:00 pm Chilean time.

                     Supernovae for spectroscopy (sorted by RA)

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Name           spectr        Priority          RA          DEC          Comments
       (exposure times, sec)  (1 is highest)      (2000.0)
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SN 2008ge       2x1800         3          04:08:24.68  -47:53:47.4  nebular phase
SN 2009ad        3x900         3          05:03:33.38  +06:39:35.7
SN 2009ag        3x700         3          07:11:40.81  -26:41:06.3 
SN 2006jd        3x900         3          08:02:07.43  +00:48:31.5  nebular phase
SN 2009cz        3x500         1          09:15:00.02  +29:44:07.1 
SN 2008if        3x900         3          09:20:23.47  -07:52:33.1  
SN 2009ao        3x800         2          09:38:08.54  +09:31:00.7  
SN 2009dq        3x400         3          10:08:49.94  -67:01:57.3  
SN 2009bb        3x600        1.5         10:31:33.87  -39:57:30.0  
SN 2009al        3x800         2          10:51:22.07  +08:34:42.7 
SN 2009P         3x900         3          11:20:38.78  -03:32:46.2   
SN 2009aa        3x900         3          11:23:42.28  -22:16:14.5    
SN 2009ds        3x400         1          11:49:04.11  -09:43:44.9  

SN 2008in        3x600         3          12:22:01.77  +04:28:47.5 
SN 2009N         3x700         2          12:31:09.00  -08:02:56.3   
SN 2008cn        3x1200        3          12:40:55.66  -40:58:12.1  Obtain griz imaging
SN 2009au        3x900         2          12:59:46.00  -29:36:07.5    
SN 2009aj        3x600         3          13:56:45.33  -48:29:36.2  
SN 2009Z         3x900         3          14:01:53.61  -01:20:30.2   
SN 2009Y         3x600         2          14:42:24.55  -17:14:46.3   
SN 2009bz        3x600         1          15:19:26.04  +11:03:30.1  
SN 2009dc        3x500         2          15:51:12.12  +25:42:28.0  
SN 2009dp        3x600         3          20:26:52.69  -18:37:04.2  
SN 2009ca        3x800         3          21:26:22.20  -40:51:48.6   
SN 2009dt        3x600         3          22:10:09.27  -36:05:42.6  
SN 2009bu        3x600         1          22:56:01.40  -63:41:39.6  
SN 2008bk        3x600         3          23:57:47.50  -32:33:24.0  nebular phase

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Old supernovae for photometry (r) + photometric stds (r):
r band image take at least 180 seconds
SN 2008cm                      3          07:16:38.75  -62:18:52.9 
SN 2008cq                      1          14:21:09.61  -29:15:04.9

Old supernovae for photometry (gri) + photometric stds (gri)
SN 2008fp                      1          07:16:32.60	-29:19:31.79   
gr exp. times 180-250 seconds, i 2x160 seconds
SN 2008bk                      3          23:57:47.50  -32:33:24.00
gr exp. times 120-160 seconds; i 2x100

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Supernova Finding charts
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. Exposure times are only tentative and need to be adjusted according to obtained S/N. Landolt's Standard Stars ----------------------------------------------------------------------------------- Field RA (2000) DEC U B V R I center sec sec sec sec sec ----------------------------------------------------------------------------------- TPHE 00 30 17 -46 32 34 --- 2 2 2 --- C PG0231 02 33 41 +05 18 40 --- 2 2 2 --- no label SA98 06 52 12 -00 19 17 --- 2 2 2 --- 670 RU149 07 24 15 -00 32 55 --- 2 2 2 --- 149 RU152 07 29 55 -02 06 18 --- 2 2 2 --- 152 PG0918 09 21 28 +02 46 03 --- 2 2 2 --- no label PG0942 09 45 12 -03 09 24 --- 2 2 2 --- no label PG1047 10 50 03 -00 00 32 --- 2 2 2 --- no label PG1323 13 25 39 -08 49 16 --- 2 2 2 --- no label PG1528 15 30 50 +06 00 56 --- 2 2 2 --- no label PG1633 16 35 24 +09 47 50 --- 2 2 2 --- no label PG1657 16 59 32 +07 43 31 --- 2 2 2 --- no label MARK A 20 43 59 -10 47 42 --- 2 2 2 --- no label PG2213 22 16 28 -00 21 15 --- 2 2 2 --- no label PG2331 23 33 44 +05 46 36 --- 2 2 2 --- no label ----------------------------------------------------------------------------------- Sloan photometric standards ----------------------------------------------------------------------------------- Field RA (2000) DEC g r i sec sec sec ------------------------------------------------------------------------------------ 020000-300600 02:00:00 -30:06:00 8-10 5-8 5-8 040020-600200 04:00:20 -60:02:00 8-10 5-8 5-8 060000-300000 06:00:00 -30:00:00 8-10 5-8 5-8 075944-595500 07:59:44 -59:55:00 8-10 5-8 5-8 100000-300000 10:00:00 -30:00:00 8-10 5-8 5-8 120000-295355 12:00:00 -29:53:55 8-10 5-8 5-8 DLS_1359-11 13:59:20 -11:03:00 8-10 5-8 5-8 160100-300000 16:01:00 -30:00:00 8-10 5-8 5-8 180000-600000 18:00:00 -60:00:00 8-10 5-8 5-8 190000-295600 19:00:00 -29:56:00 8-10 5-8 5-8 200000-300000 20:00:00 -30:00:00 8-10 5-8 5-8 220100-300000 22:01:00 -30:00:00 8-10 5-8 5-8 --------------------------------------------------------------------------------------- Spectrophotometric Standard Stars ---------------------------------------------------- Star RA (2000) DEC V Time (sec) ---------------------------------------------------- LTT 377 00:41:46.6 -33:39:10 11.229 30 LTT 1020 01:54:49.7 -27:28:29 11.522 30 EG 21 03:10:30.4 -68:36:05 11.379 30 LTT 1788 03:48:22.2 -39:08:35 13.155 60 LTT 2415 05:56:24.2 -27:51:26 12.214 45 Hilt 600 06:45:13.5 +02:08:15 10.441 15 L745-46A 07:40:20.9 -17:24:42 13.0 45 LTT 3218 08:41:33.6 -32:56:55 11.858 30 LTT 3864 10:32:13.8 -35:37:42 12.171 30 LTT 4364 11:45:50.0 -64:50:30 11.504 30 Feige 56 12:06:39.7 +11:40:39 11.057 30 LTT 4816 12:38:50.7 -49:47:58 13.794 60 CD 32 14:11:46.3 -33:03:15 10.452 30 LTT 6248 15:38:59.8 -28:35:34 11.797 30 EG 274 16:23:33.7 -39:13:48 11.029 30 LTT 7379 18:36:26.2 -44:18:37 10.225 15 LTT 7987 20:10:57.1 -30:13:03 12.230 30 LTT 9239 22:52:40.9 -20:35:27 12.068 30 Feige 110 23:19:58.3 -05:09:56 11.826 30 LTT 9491 23:19:35.2 -17:05:28 14.112 90 ----------------------------------------------------
  • A list of Spectrophotometric Standard Stars may be found here Please observe 3 spectrophotometric standards with wide slit. Bessell Standards for telluric feature correction -------------------------------------------------------------- Star RA (2000) DEC V Time (sec) -------------------------------------------------------------- L745-46A 07:40:20.9 -17:24:42 13.0 120 DF,Bessell99 LTT 4364 11:45:50.0 -64:50:30 11.504 40 EG131 19:20:35.0 -07:40:00 12.28 100 Bessell99 NGC 7293 22:29:38.6 -20:50:14 13.5 200 PN central star LTT 9491 23:19:35.4 -17:05:28 14.1 300 DC,Bessell99 -------------------------------------------------------------- Click on the star name to get a finding chart Please get a high S/N spectrum of ONLY ONE of these standards with the narrow slit, followed by a comparison lamp exposure. We strongly recommend LTT9491 and L745-46A.