From: Robert A. Knop Jr. (robert.a.knop@vanderbilt.edu)
Date: Fri May 10 2002 - 07:24:18 PDT
TNG TARGETS FRIDAY MAY 10 -- Version 1.0
This is preliminary, and may be updated again today. The "Version"
number above will be bumped if this happens.
Javier, are you the observer? If so, could you please acknolwedge
receipt of this?
Assumptions: night begins at 22:20 GDT, LMST 11:23
night ends at 5:55 GDT, LMST 18:59
==> ~7.5 hours available
"GDT" is local time....
Some of this data will hopefully be used as confirmation data to help us
decide what to do at Keck. If possible, right after you take the data
please ftp it to
brahms.phy.vanderbilt.edu
Put it in directory
/incoming/tng/2002may10
(There are also directories 2002may11 and 2002may12 for the next two
nights.)
Candidates are listed in the order they should be done; I've assumed a
~2 minute overhead per image. Let me know if this is vastly wrong. The
"Prio" at the end can be used as a guide of which to skip if you fall
behind schedule. *Higher* numbers are *better* candidates, i.e. make
sure you do the 5's. I've chosen exposure times assuming ~1-1.1" seeing
and based it on the sky and zeropoint measurements we have from last
year's TNG images.
The number of exposures and the time of each exposure is listed for each
candidate. Please dither between exposures by 10-20", and where there
are more than 2 exposures please use a dither pattern that won't repeat
a position for any candidate. NOTE -- if the time listed is too long
(will bring the sky to well more than half well depth), reduce exposure
times to (say) 600s and increase the number of exposures accordingly.
Please get R and I twilight and dome flats, and (during the day) zeros.
Also please do standard stars in twilight. Let me know if you want some
standard star coordinates.
NOTE : Magnitudes are based on the search. For S02-xxx candidates, some
of the magnitudes are estimates based on AB magnitudes (with ~0.5
subtracted to convert to a Vega-mag), and sometimes even that zeropoint
isn't well known. Treat them with caution. The magnitudes for the
other candidates will hopefully have some bearing on reality. These
magnitudes are for informational purposes only; I've already taken them
into account when choosing the exposure times.
Candidate RA(2000) Dec(2000) Time R(s) Time I(s) Prio Mag (band)
===========================================================================
S02-058 13:23:37.3 +27:45:05.1 3x900 5x900 5 ~23 (I)
S02-064 13:24:06.3 +27:42:10.0 2x600 3x900 4 ~22.4 (I)
T02-037 15:46:57.0 +08:12:36.6 2x300 3x600 5 22.3 (R)
T02-028 15:36:25.5 +09:28:18.2 2x600 3x600 5 22.8 (R)
T02-030 15:43:24.4 +07:53:57.8 4x900 --- 4 23.3 (R)
T02-029 15:37:07.5 +09:36:18.7 2x300 3x300 4 21.3 (R)
T02-047 15:36:29.9 +09:38:42.9 3x600 --- 3 22.9 (R)
-Rob
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