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Blank Fields

Stumbled upon a very interesting page by Santos Pedraz Marcos with a collection of standard stars, I found this table of blank fields:

 
Name     RA1950     DE1950      Reference 
Roeser1  00 16 25.0 +16 09 00   CL 0016+16
Cadis1H  01 45 01.3 +02 05 07   Cadis
Blank1   04 25 46.0 +54 09 03   PASP 97,363
Cadis9H  09 10 28.0 +46 26 23   Cadis
Cadis10H 10 49 00.0 +57 41 52   Cadis, Lockman Hole
Cadis10H 10 49 00.0 +57 51 52   Cadis
Blank2   12 26 49.8 +02 17 56   PASP 97,363
BlankUH  13 07 47.9 +36 15 08   priv.com. 3 brighter *, else empty
HDF      13 34 35.5 +62 29 28   Williams et al 1996 AJ 112,1335
Cadis13H 13 45 11.4 +05 52 32   Cadis
Cadis13H 13 45 51.4 +05 52 32   Cadis
Cadis16H 16 23 28.9 +55 50 47   Cadis
Blank3   16 49 42.0 -15 21 00   PASP 97,363 (? RA:1982,DE:1982)
Cadis18H 17 59 43.0 +66 21 20   Cadis (NEP)
Blank4   19 19 09.0 +12 22 05   PASP 97,363
Blank5   21 26 54.4 -08 51 41   PASP 97,363
Cadis23H 23 13 16.5 +11 10 09   Cadis
Roeser2  23 45 45.0 +00 40 40   priv.com.
Blank6   23 54 08.9 +59 28 18   PASP 97,363