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NOAO Newsletter - Cerro Tololo Inter-American Observatory - June 1997 - Number 50


Observing Request Statistics: August 1997 - January 1998

4-m Telescope: 142 nights

      Requests            Nights Requested

   Dark      Bright       Dark      Bright      Instrument    Nights   % 
    10         6           42         21           Argus        63    12.7
     0         4            0          9             COB         9     1.8
     4         0            7          0          CF/CCD         7     1.4
    26         8           88         35          CS/CCD       123    24.7
     5        15           18         59         Ech/CCD        77    15.5
     0         4            0         14           CIRIM        14     2.8
     0        15            0         51          IR/IRS        51    10.3
    13         2           37          4          PF/CCD        41     8.2
    25         1           83          4             BTC        87    17.5
     3         0           11          0            RF-P        11     2.2
     0         4            0         14         Visitor        14     2.8
    --        --          ---        ---                       ---   -----
    86        59          286        211                       497   100.0

                           Now       Last Semester    Semester Before Last
No. of requests            145            131                  133
No. of nights requested    497            433                  471
Oversubscription          3.50           2.99                 4.13
Average request           3.43           3.31                 3.54


1.5-m Telescope: 149 nights

      Requests            Nights Requested

   Dark      Bright       Dark      Bright      Instrument    Nights   % 
     3         2           24         12           ASCAP        36    11.8
    23         5          115         19          CF/CCD       134    44.1
     7         8           25         33          CS/CCD        58    19.1
     1         3           10         25         Ech/CCD        35    11.5
     0        11            0         34           CIRIM        34    11.2
     1         1            5          2            RF-P         7     2.3
     0         0            0          0         Visitor         0       0
    --        --          ---        ---                       ---   -----
    35        30          179        125                       304   100.0

                           Now       Last Semester    Semester Before Last
No. of requests             65             45                   55
No. of nights requested    304            220                  270
Oversubscription          2.04           1.39                 1.66
Average request           4.68           4.89                 4.91


0.9-m Telescope: 171 nights

      Requests            Nights Requested

   Dark      Bright       Dark      Bright      Instrument    Nights   % 
    21        10          128         71          CF/CCD       199   100.0

                           Now       Last Semester    Semester Before Last
No. of requests             31             31                   27
No. of nights requested    199            259                  221
Oversubscription          1.16           1.51                 1.31
Average request           6.42           8.35                 8.19


Schmidt Telescope: 132 nights

NF/CCD 15 requests for 167 nights 100.0%

                           Now       Last Semester    Semester Before Last
No. of requests             15             16                   17
No. of nights requested    167            142                  156
Oversubscription          1.27           1.02                 1.11
Average request          11.13           8.88                 9.18


ESO 3.6 m Telescope: 12 nights

ADONIS   3 req. for   10 nights    58.8
TIMMI    1 req. for    4 nights    23.5
EFOSC1   1 req. for    3 nights    17.6
         -            --          -----
         5            17          100.0

                           Now       Last Semester    Semester Before Last
No. of requests              5              2                    4 
No. of nights requested     17             11                    9
Oversubscription          1.42           0.92                 0.75 
Average request           3.40           5.50                 2.25

Ximena Herreros
xherreros@noao.edu


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