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Table 1

Observations and exposure times in 2005−201112.

2005 2006 2007 2008 2009 2010 2011 Tot
Jan. 140 211 313 414 418 489 683 2668
0.64 1.89 1.85 1.83 1.65 1.65 1.85 11.36
Feb. 148 192 295 408 487 505 646 2681
0.71 1.47 1.62 1.67 1.57 1.47 1.56 10.07
Mar. 274 259 411 401 476 507 703 3031
0.96 1.66 1.88 1.80 1.68 1.58 1.75 11.31
Apr. 164 241 337 391 372 617 572 2694
1.31 1.55 1.73 1.73 1.73 1.62 1.49 11.16
May 169 372 418 435 474 631 640 3139
1.41 1.94 1.76 1.72 1.78 1.82 1.68 12.11
Jun. 183 244 379 438 480 589 712 3025
1.45 1.63 1.67 1.70 1.74 1.79 1.73 11.70
Jul. 311 283 472 437 401 588 667 3159
1.81 1.78 1.73 1.58 1.58 1.82 1.72 12.02
Aug. 217 301 221 415 494 543 642 2833
1.72 1.81 0.89 1.62 1.88 1.83 1.55 11.30
Sep. 221 244 266 346 449 530 598 2654
1.78 1.64 1.60 1.48 1.64 1.70 1.49 11.33
Oct. 230 273 283 417 433 644 645 2925
1.77 1.72 1.67 1.68 1.67 1.74 1.64 11.89
Nov. 232 235 381 336 467 645 754 3050
1.81 1.83 1.76 1.79 1.71 1.80 1.67 12.37
Dec. 212 272 407 404 483 681 693 3152
1.85 1.79 1.83 1.77 1.79 1.81 1.73 12.57
Tot 2501 3127 4183 4842 5434 6969 7955 35   011
17.21 20.71 20.02 20.38 20.43 20.64 19.85 139.2

Notes.

(1)

The first number of each entry shows the total observations per month.

(2)

The second number of each entry shows the total exposure time per month, in units of Ms.

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