Hi Joey,

I think I sent you enough targets for half a night... 
and there's two halves...
hmmm..   But, weather can be iffy in June.
Lets' start with this list, then if its clear and you were able to
get everything, then I'll send you a new list on Sunday.
There are plenty of targets !!
I'll have all the targets on my web page, and a copy of this email.


I will send you additional second half target, Just in case you might
not have targets. If you are able to make some observations, great, 
they will make useful measurements, If not, thats fine, too.

Thanks for doing our observing for us !!!

If you have any questions please let me know,


Jun 9th
For the night of: Sat, 2007 Jun 9 ---> Sun, 2007 Jun 10
Sunset ( 2215 m horizon):   17 58 CST; Sunrise:    7 28 CST
Evening twilight:   19 15 CST;  LMST at evening twilight:   11 44
Morning twilight:    6 10 CST;  LMST at morning twilight:   22 40
night center:    0 43 CST
The sun is down for 13.5 hr; 10.9 hr from eve->morn 18 deg twilight. wow !! long nights !!


I don't think we have time of get a good spectrum of sn2006jd, because 
the target sets too early, even trying to get spectra on each night doesn't quite work.
But, a couple images would make a useful light curve measurement.

  target       pos                  brightness      Requested Science Exposures
 sn2005la 12:52:15.68 +27:31:52.5                   1x1200sec offset is 6"S and 6"W
 sn2004gk 12:25:33.23 +12:15:40.1                   2x1200sec offset is 2.7"N and 1.5"W 
 sn2006ck 13:09:40.42 -01:02:57.2                   2x1200sec offset is 3.0"S and 10.2"W
 sn2006jd 08:02:07.43 +00:48:31.5      22nd mag     r' i' imaging 120 seconds each.
 sn2007aw 09:57:24.16 -19:21:23.1     ~21 mag       3x20 min + acquisition images
 sn2007S  10:00:31.26 +04:24:26.2     ~20 mag       3x20 min + acquisition images
 sn2007I  11:59:13.15 -01:36:18.9     ~21 mag      ~4x20 min + acquisition images
 sn2007C  13:08:49.30 -06:47:01.0     ~19 mag      ~3x20 min + acquisition images
SNF20070517-014 22:42:48.98 24:02:47.2 18.2 mag    2x15 minutes + 10 minutes center on host
(this is second half object... If it doesn't work out with your targets list,
no problem. Don't worry about it.)

1) sn2005la 
2) sn2004gk 
3) sn2006ck 
4) sn2007I
5) sn2007C
6) sn2007aw  (I still need to make a finder for this target.)
7) sn2007S   (I still need to make a finder for this target.)
8) SNF20070517-014 (if possible)
 This is a new target... we don't have access to the finders, etc, so we don't
 know the angle between the host galaxy and the supernova. It would be nice
 to get both spectra at the same time. very hard to figure out with LDSS3 on the fly.
 If there is time, then get 2x15 minutes on the supernova, and 1x10 minutes on
  the host galaxy, just do another lcobject and acquiring on the host galaxy
  instead of the Supernova.  I'll make a finder.
 If little time, then just spectrum of SN.

 Standard stars: Yes, please try to observe all 4.
  name           position          LDSS3 exposure time
 LTT 3218    08:41:33.6 -32:56:55   20 seconds  
 LTT 3864    10:32:13.8 -35:37:42   30 seconds 
 LTT 4364    11:43:36.6 -64:50:24   15 seconds 
 LTT 4816    12:38:50.7 -49:47:58   45 seconds 
 USE the humay star catalog.. because it has the correct proper motion !
 Parallactic angle !!!!! remember to ask the operator to make sure the
 rotator is set to the  Parallactic angle.
 (I didn't do this once and its really makes a huge difference in the
 flux calibration !!!

 The catalog
 001  sn2006jd       08:02:07.43 +00:48:31.5 2000.0   0.00   0.00   -62.6 HRZ
 002  sn2007I        11:59:13.15 -01:36:18.9 2000.0   0.00   0.00   -62.6 HRZ
 003  sn2007C        13:08:49.30 -06:47:01.0 2000.0   0.00   0.00   -62.6 HRZ
 004  sn2007aw       09:57:24.16 -19:21:23.1 2000.0   0.00   0.00   -62.6 HRZ
 005  sn2007S        10:00:31.26 +04:24:26.2 2000.0   0.00   0.00   -62.6 HRZ
 006 SNF20070517-014 22:42:48.98 +24:02:47.2 2000.0   0.00   0.00   -62.6 HRZ
 007  sn2005la       12:52:15.68 +27:31:52.5 2000.0   0.00   0.00   -62.6 HRZ
 008  sn2004gk       12:25:33.23 +12:15:40.1 2000.0   0.00   0.00   -62.6 HRZ
 009  sn2006ck       13:09:40.42 -01:02:57.2 2000.0   0.00   0.00   -62.6 HRZ

 finders for sn2006jd sn2007I and sn2007C (i'll put all other finders here, too.)

 These images were taken at Magellan 2 months ago. You probably will need
 to change the LUT values in lcobject to match these images.

 more finders are here:

 Slit: 1.25" BLUE TILT (or 1.0" is fine)

 Subraster: 1 2064 1500 2800 (This is close to getting the entire
 4 sections of the long slit) no need to ever change this. You should see
 the yellow boxes on the quick tool match slits.
This subraster includes everything in the X direction (wavelength) and part
 of the Y direction (spatial).

 binning: 1x1

 readout: slow for everything

 Flats: Lamp Quartz high 5 seconds.
 we don't take flats in the afternoon. Because of the fringing we use
 the flats taken about the same time as the observations.
 after each science exposure. take 3 flats (NO HENEAR).
 its pretty quick. A total of ~6-9 is a good number per target.

 Henear: the LDSS3 wavelengths don't change over the course of the night,
 so just take one or two at the beginning of the night and maybe one at the 
 last target exposure time: 2 seconds.

 To be done in the afternoon: measure params for ltoslit and lcobject

 make an image of the slit
 in GUI: 1 second exposure. 1.25" BLUE SLIT. no grating. no filter.
 (I think the scattered light in the dome is enough...)

 the IRAF task "lstitch" combined the 2 CCD images into 1 fits image.

 Remember we are using the 1.25" slit with the BLUE slit. ( or 1.00" slit is fine. )
 Because of the design of the spectrograph the BLUE slit will increase
 the throughput of the blue wavelengths.

 you can use iraf imexam  "j" I think to get the centering of the slit.
         jimexam    Parameters for line 1D gaussian fit plots
         kimexam    Parameters for column 1D gaussian fit plots

 on April 15th the Parameters for lcobject and ltoslit were
 the position of the slit is X= 2676.06
                             Y= 2100.00
 these were measured on the lstitch image
(The manual say not to do this.. we think the manual is wrong ??)


 just after sunset:
 r' and i' dome flats
 try to get at least 7 exposures ~5-10 seconds.
 ( I think you have to use the low voltage quartz lamp,
   minimum exposure for a usable flat is 5 seconds to avoid any shutter issues.)

 Acquisition for standard stars:
 goto catalog object (Humay catalog)
 after slew, operator will ask you to run ltoslit
 run ltoslit
 grating - Clear, or none, filter - r', aperture - Clear, or none

 take acquisition image:
 r' 1 second
 readout slow. best to keep readout set to "slow" for the entire night.

 run lcobject

The IRAF task lcobject will ask you a couple questions.
What's the size of the image you want displayed... ?
 I pick ~600 or 1000 pixels.

 "Do you want to SKIP the measurement of the slit ?"
 answer: YES
 (because you already did this in the afternoon, and lcobject has
 the correct parameters)

 "Did you just acquire the object ?"
 answer: NO, because you are using ltoslit. Then the task lcobject will show you
 an image in ds9 centered on your x,y lcobject parameters.
 i.e. the Supernova should be near the center of the ds9 image.
 Adjust gray levels as needed.  select SN with cursor or centroid (m).
 Double check the pick circle is centered around the SN.

 If the slew if > 10" then you'll need another acquisition image and repeat lcobject.
 This doesn't really hurt, its just an extra minute and it is
 important that the target is really in the slit !!!!

 If the slew is < 10", then  (The telescope usually does a good job of correctly
   slewing and putting the object into the slit when the slew is less than 10 arcseconds.
  Also, we're using a wide slit 1.25"... if we were using 0.75" then we would be more
  picky about the size of the final slew into the slit.)

 Then set in the GUI:
 put in grating - VPH_ALL, filter - CLEAR, aperture - 1.25 BLUE (called LS12.2s)

take science exposure (exposure from above)
take 5 flats.
summary of observing sequence:

wait for guiding
take acquisition image
   r' 1 second
If slew < 10", then proceed to science exposure, otherwise take another acq image

science exposure 
5 x 5 second flats bright quartz lamp.

Acquisition For Supernovae for just imaging: sn2006jd

  go to catalog object
  ask operator to set guiding and SH.
  take r' and i' images

Acquisition For galaxy spectra:
  go to catalog object
     after slew, operator will ask you to run ltoslit
     run ltoslit

Take 45 second r' acquisition image.
centroid on host galaxy (based on the finders or DSS image)
then offset 
                                                                OFFSET are here: 
 sn2005la 12:52:15.68 +27:31:52.5                   1x1200sec offset is 6"S and 6"W
 sn2004gk 12:25:33.23 +12:15:40.1                   2x1200sec offset is 2.7"N and 1.5"W
 sn2006ck 13:09:40.42 -01:02:57.2                   2x1200sec offset is 3.0"S and 10.2"W
For the galaxies with just 1 20 minutes exposure just take
6 flats afterward.


 Acquisition For Supernovae for spectra:
     go to catalog object.
     after slew, operator will ask you to run ltoslit
     run ltoslit

 the operator now sets up the guiding and SH.
 Take images: in GUI
 grating = none, filter - i', aperture - Clear

 observe both r' and i' for 10 seconds each and then 45 seconds each.
 readout slow, same subraster for everything.

Observing sequence:
i' 15 seconds
i' 60 seconds
r' 15 seconds
r' 60 seconds (most likely to have best SN signal, so we do it last)

lstitch the last r' image.

run lcobject

if the slew is < 10" then set the GUI to:
 grating VPH_ALL , filter - None or Clear , aperture  LS10.2s

summary of observing sequence:

slew to target
wait for guiding
i' 15 seconds    
i' 60 seconds
r' 15 seconds
r' 60 seconds
(another r' if needed)
20 minute science exposure
 I don't like to go more than 1200 seconds, because of seeing changes.
3 flats 5 second each
20 minute science exposure
3 flats 5 second each
20 minute science exposure
3 flats 5 second each

no need for additional henear... just once during the evening.
3 flats 5 second each

Acquisition for Galaxies.

slew to catalog object
Catalog should be
 00X  galaxy   13:08:49.30 -06:47:01.0 2000.0   0.00   0.00   117.4+PA  
So, if the directions are for angle 54 degrees,
then the catalog will be
 00X  galaxy   13:08:49.30 -06:47:01.0 2000.0   0.00   0.00   171.4     

run ltoslit

take r' for 30 seconds (exposure depends on brightness of galaxy).

lstitch the image
centroid on the galaxy center.

if slew > 10", repeat acquisition.
if slew < 10", then proceed with science exposures.
xx minute science exposure
3 flats 5 second each
xx minute science exposure
3 flats 5 second each
xx minute science exposure
3 flats 5 second each

 sn2005la 1.2m image  

sn2005la 5x5arcmin DSS image centered on SN position

sn2004gk gmos image pretty crappy.. sorry...

sn2004gk 5x5arcmin DSS image centered on SN position

sn2006ck finder

sn2006ck 5x5arcmin DSS image centered on SN position

Sn2007aw finder from Carnegie, our 1.2m images dont show it any better. Offset from host is 3.3 arcsec E, 5.2 arcsec S

sn2007S image from 1.2m on April 21.. so its about 1 mag fainter now... size of finder is ~4 arcmin

sn2006jd Magellan LDSS3 March 20

sn2007I Magellan LDSS3 March 20

sn2007C Magellan LDSS3 March 20

SN2007al type sn91bg 2x450 seconds

SN2007ag type Ib 2x600 seconds

SN2006NX galaxy at airmass 2.2 just galaxy, H beta and [OIII] are there 2x600 seconds

SN2007ao type sn91bg ???? 3x450 seconds

SN2007I Broad Ic 4x900 seconds

SN2007C Type IIb 3x600 seconds

SN2006jd Type IIb 4x1200 seconds

position @ sn2004aw in its host galaxy 3x1200 seconds