Instructions and finder charts for 0.9-m observing Nov/Dec 2006

Instructions and finder charts for the 0.9-m observing for ESSENCE calibration, Nov/Dec 2006.

Finder charts 10 arcmin wide can be found below.

Standards should be observed in BVRI since two of the fields at the end of the night should be observed in BVRI.

The wxb1 field is the same as waa7, and we already have six nights of calibration on the stars corresponding to the center of chip 6 of the CTIO 4-m Mosaic camera for that field. So we should just go straight to location of the supernova itself which was found in wxb1.

                               equinox  Exposures (sec)  photometric    Comments
            RA           DEC               V    R    I   sky needed?
                                                                      do a field of standards in BVRI  ***

b017     23:29:44.1  -09:36:34   2000     300  400  600     Yes       location of SN 2002jb itself
wxc1     23:36:38.6  -10:14:47   2000     300  400  600     Yes       center of chip 6 location
wxh1     00:14:08.3  -10:24:41   2000     300  400  600     Yes       center of chip 6 location

                                                                      do a field of standards in BVRI  ***

wxm1     00:28:37.6  +00:21:02   2000     300  400  600     Yes       center of chip 6 location
wxt2     02:20:37.6  -07:54:00   2000     300  400  600     Yes       center of chip 6 location

                                                                      do a field of standards in BVRI  ***

wxu2     02:20:37.2  -09:24:04   2000     300  400  600     Yes       center of chip 6 location
wyc3     02:08:17.8  -03:49:45   2000     300  400  600     Yes       center of chip 6 location 

                                                                      do a field of standards in BVRI  ***
                                                                      (standards should be done at the
                                                                       end of the night, too, please)

The goal here is to calibrate these fields on at least three photometric nights if we can. Each field might be observed in 300 + 400 + 600 sec = 1300 sec ~ 22 minutes plus 6 minutes readout time, or roughly half an hour. So it may be possible to observe all seven of them in 3 1/2 hours of observing PLUS the time it takes to do standards. Thus, before 3 AM one might finish the 7 fields above. Then you could aim directly at the locations of the ESSENCE supernovae (see below).

If it is photometric on the nights of Nov 18, 19, and 20 (UT dates 19, 20, and 21), and you have imaged the "chip 6" locations for the six fields given above on three occasions, then you can take images directly at the locations of the other supernovae that were discovered by the ESSENCE team in 2002:


ESSENCE     field      SN              RA           DEC       equinox   Exposures
name                                                                   V     R    I    

b008        wxc1      2002jq      23:35:57.96   -10:05:56.88   2000   300   400  600
b003-c003   wxh1      2002iu/jt   00:13:34.9    -10:10:47.0    2000   300   400  600  halfway between b003 and c003
b027        wxm1      2002jd      00:28:38.39   +00:40:29.29   2000   300   400  600

c023        wxm1       ---        00:28:03.16   +00:37:50.43   2000   300   400  600
b022        wyc3      2002jc      02:07:27.28   -03:50:20.73   2000   300   400  600
b004        wxt2      2002iv      02:19:16.11   -07:44:06.72   2000   300   400  600

c012        wxu2      2002ju      02:20:11.00   -09:04:37.50   2000   300   400  600
b023        wxu2      2002js      02:20:35.39   -09:34:43.90   2000   300   400  600

If it is photometric, please end the night with a field of standards.

b008 (SN 2002jq) can be observed until 4 hours UT and the last ones in the list can be observed till 7 hours UT on November 19 UT.

Other program fields to observe towards the end of the night:

            RA          DEC      equinox     B   V    R    I 
L95-S180 03:53:28.0  +00:06:01    2000       80  40   40   40    observe with or without clouds
NGC1559  04:17:37.9  -62:46:09.5  2000      100  40   40   60    must be photometric

*** If it is photometric, please end the night with a field of standards.***

Backup plan for non-photometric sky :

Saturday afternoon November 18 I received a list of "live" supernova targets from Weidong Li. In addition to observing L95-180 if it is non-photometric, these would be good targets too:


  SN     RA (2000)     DEC     mag  type      Estimated exposures
                                              B      V     R     I
2006lc 22:44:24.45 -00:09:53.9 18.7  Ibc     900    400   300   400
2006ej 00:38:59.77 -09:00:56.6 19.0  Ia    2X600    500   400   500
2006et 00:42:45.82 -23:33:30.4 18.8  Ia      900    500   400   500
2006ob 01:51:48.11 +00:15:48.3 17.9  Ia      600    360   300   400  also found by SDSS
2006ef 02:04:19.51 -08:43:42.2 19.0  Ia    2X600    500   400   500
2006hb 05:02:01.28 -21:07:55.1 18.5  Ia-bg   900    400   300   400
2006mq 08:06:12.39 -27:33:45.4 13.7  Ia      120     60    40    60

More information on SN 2006mq can be obtained by clicking here.

A finder chart for the candidate tentatively called u01333 can be obtained by clicking here.

More information on SN 2006hb and 2006lc can be obtained by clicking here.

Good Landolt fields for November and December. Some of these are not in the 1992 paper. Kevin faxed 5 charts to Tololo on November 17. Typical exposures might be B = 80 sec, V = 30, R = 20 sec, I = 40 sec. SA 92-249 is rather bright, so maybe the exposures should be perhaps half as long.

              RA           DEC      equinox    comment

JL82     21:36:06.00  -72:49:00.00  2000.0  new landolt
PG2213   22:16:22.00  -00:21:49.00  2000.0  landolt(1992) 4*(B)

JL163    00:10:30     -50:15:00     2000.0  new landolt
T_Phe    00:30:16.00  -46:27:55.00  2000.0  landolt(1992) 5*(B)
92-249   00:54:34.00  +00:41:10.00  2000.0  
PG0231   02:33:41.00  +05:18:40.00  2000.0  blue star is problematic
95-190+3 03:53:16.00  +00:16:25.00  2000.0
LB1735   04:31:38.00  -53:36:59.00  2000.0  new Landolt (F)

MCT0550  05:51:54.00  -49:10:48.00  2000.0  new Landolt
SA98-670 06:52:12.00  -00:21:27.00  2000.0  landolt(1992) 10*wide
Rubin149 07:24:16.00  -00:32:17.00  2000.0  landolt(1992) 8*
Rubin152 07:29:56.00  -02:05:39.00  2000.0  landolt(1992) 7*(B)

Please monitor focus and adjust if necessary. Beware of tracking glitches. Please take another image if the telescope jumps.

Kevin's cell phone number is 979-595-5570. It is not certain if his computer will work at home over the weekend. So he might not be able to read email at home or look at images. Perhaps he will have to go into the office and use his computer there.

I have made finder charts from the Digital Sky Survey. Each one is close to 10 arcmin from left to right and a little bit less from top to bottom, but they should be good enough to help confirm you are pointing at the right place. NORTH = up, EAST = left.

wxb1 (same as waa7), center of chip 6. But we do not really need to do this field because it is the same as waa7, and we already have 6 nights of calibration on the waa7 field (chip 6). NORTH = up, EAST = left.

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wxc1, center of chip 6. NORTH = up, EAST = left:

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wxh1, center of chip 6. NORTH = up, EAST = left:

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wxm1, center of chip 6. NORTH = up, EAST = left:

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wxt2, center of chip 6. NORTH = up, EAST = left:

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wxu2, center of chip 6. NORTH = up, EAST = left:

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wyc3, center of chip 6. NORTH = up, EAST = left:

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b017 (SN 2002jb). NORTH = up, EAST = left:

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b008 (SN 2002jq). NORTH = up, EAST = left:

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Halfway between b003 (SN 2002iu) and c003 (SN 2003jt). NORTH = up, EAST = left:

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b027 (SN 2002jd). NORTH = up, EAST = left:

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c023 (has no IAU supernova designation). NORTH = up, EAST = left:

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b022 (SN 2002jc). NORTH = up, EAST = left:

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b004 (SN 2002iv). NORTH = up, EAST = left:

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c012 (SN 2002ju). NORTH = up, EAST = left:

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b023 (SN 2002js). NORTH = up, EAST = left:

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NGC 1559, the host last year of SN 2005df. NORTH = up, EAST = left:

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L95-S180, a new variable star in Selected Area 95. NORTH = up, EAST = left:

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