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6.0 Updates to System Efficiencies and Zeropoints

To be read in conjunction with Section 6.1 of the WFPC2 Instrument Handbook, Version 4.0.
Table 2 is an update to Table 6.1 of the WFPC2 Instrument Handbook. New calibration information has caused us to change the estimated efficiencies and throughputs of several of the narrowband and UV filters since the last publication of this table. These numbers are accurate to at least 10%-which is sufficient for planning observations, but not for the analysis of many programs. Investigators wishing to do photometry on WFPC2 images should examine the HST Data Handbook for an explanation of the conventions used in determining WFPC2 zeropoints and should use the zeropoints given in Table 28.1 of the Data Handbook. For the most accurate and up-to-date calibrations you may wish to examine the on-line version of the Data Handbook to make sure that no numbers of interest to you have changed since the last paper publication.

Table 2: System Efficiencies and Zeropoints

Filter

QTd /

QTmax

d/d

p

<>

max

me/sec

twfsky

F122M

0.00012

1419.7

438.2

0.1311

0.00118

24.40

1748.5

2018.0

1258

18.69

1.7E+06

F130LP

0.09178

5115.8

4776.0

0.3965

0.12977

804.10

5786.6

6107.1

6386

25.90

F160AW

0.00025

1491.8

448.9

0.1278

0.00075

24.36

1517.3

1530.4

1406

19.50

7.7E+05

F160BW

0.00025

1491.8

448.9

0.1278

0.00075

24.36

1517.3

1530.4

1406

19.50

7.7E+05

F165LP

0.08841

5195.6

4541.2

0.3712

0.12633

715.80

5817.0

6118.8

6386

25.86

F170W

0.00057

1749.8

545.5

0.1324

0.00178

30.67

1824.6

1872.6

1834

20.38

3.5E+05

F185W

0.00035

1952.9

335.0

0.0729

0.00188

10.37

1971.9

1983.1

1936

19.86

9.1E+06

F218W

0.00057

2191.6

387.9

0.0752

0.00275

12.38

2205.2

2212.2

2248

20.38

5.6E+06

F255W

0.00078

2585.8

393.2

0.0646

0.00452

10.78

2597.3

2603.1

2546

20.73

4.1E+06

F300W

0.00519

2942.8

735.8

0.1062

0.01838

33.17

2981.9

3002.7

2866

22.78

7.1E+04

F336W

0.00403

3342.2

381.1

0.0484

0.02872

7.84

3359.4

3369.2

3456

22.51

3.3E+04

F343N

0.00006

3432.9

27.3

0.0034

0.00691

0.04

3440.4

3445.6

3432

17.94

2.2E+06

F375N

0.00008

3737.5

27.3

0.0036

0.00774

0.04

3743.0

3746.7

3737

18.14

7.5E+05

F380W

0.00693

3964.4

673.0

0.0721

0.03406

20.61

3984.8

3995.0

3994

23.10

7.8E+03

F390N

0.00029

3888.7

45.2

0.0049

0.01880

0.10

3889.6

3890.3

3885

19.65

1.9E+05

F410M

0.00164

4090.1

146.7

0.0152

0.03619

0.95

4092.6

4093.9

4098

21.53

3.3E+04

F437N

0.00019

4370.3

25.3

0.0025

0.02681

0.03

4369.6

4369.7

4368

19.19

1.8E+05

F439W

0.00501

4299.8

473.3

0.0467

0.03436

9.40

4309.6

4314.4

4186

22.74

6.9E+03

F450W

0.01501

4519.1

956.6

0.0899

0.07955

36.52

4555.1

4572.9

5066

23.94

2.3E+03

F467M

0.00216

4668.7

166.7

0.0152

0.04825

1.07

4669.9

4670.5

4732

21.83

1.6E+04

F469N

0.00023

4694.4

24.9

0.0022

0.03267

0.02

4694.5

4694.5

4699

19.40

1.5E+05

F487N

0.00029

4865.1

25.8

0.0023

0.04239

0.03

4865.4

4865.8

4866

19.65

8.5E+04

F502N

0.00037

5012.2

26.8

0.0023

0.05226

0.03

5013.1

5013.1

5008

19.92

6.7E+04

F547M

0.01224

5476.3

483.1

0.0375

0.10577

7.69

5484.0

5487.8

5566

23.71

2.0E+03

F555W

0.02727

5397.5

1226.4

0.0965

0.10312

50.26

5447.9

5473.3

5536

24.58

9.0E+02

F569W

0.02139

5614.2

965.7

0.0730

0.10587

29.96

5644.9

5660.3

5536

24.32

8.8E+02

F588N

0.00133

5893.5

49.0

0.0035

0.12054

0.07

5893.5

5893.6

5894

21.30

1.4E+04

F606W

0.04191

5935.0

1497.3

0.1071

0.13468

68.12

6002.3

6036.1

6194

25.05

4.5E+02

F622W

0.02649

6162.8

916.5

0.0632

0.13123

24.58

6187.5

6199.8

6416

24.55

7.1E+02

F631N

0.00078

6306.4

30.8

0.0021

0.11709

0.03

6306.4

6306.4

6306

20.73

2.4E+04

F656N

0.00045

6563.7

21.4

0.0014

0.10379

0.01

6563.7

6564.0

6561

20.13

3.4E+04

F658N

0.00063

6590.1

28.5

0.0018

0.10574

0.02

6590.8

6590.9

6596

20.49

2.4E+04

F673N

0.00104

6732.1

47.2

0.0030

0.11134

0.06

6732.2

6732.3

6736

21.04

1.5E+04

F675W

0.02169

6695.9

865.6

0.0549

0.12770

20.18

6716.1

6726.2

6634

24.34

7.1E+02

F702W

0.03206

6867.8

1382.5

0.0855

0.13397

50.19

6918.8

6944.5

6514

24.76

4.8E+02

F785LP

0.00780

8617.0

1331.7

0.0656

0.04378

37.11

8654.8

8673.9

8306

23.23

1.6E+03

F791W

0.01589

7826.3

1205.0

0.0654

0.09120

33.46

7860.5

7877.7

7364

24.00

7.9E+02

F814W

0.01799

7920.9

1488.8

0.0798

0.09937

50.47

7973.0

7999.5

7266

24.13

7.0E+02

F850LP

0.00395

9072.1

985.8

0.0461

0.03491

19.32

9091.6

9101.6

8800

22.49

2.9E+03

F953N

0.00012

9544.7

52.5

0.0023

0.01651

0.05

9544.7

9544.8

9526

18.69

9.6E+04

F1042M

0.00015

10183.5

365.0

0.0152

0.00440

2.36

10188.8

10191.1

10110

18.99

6.2E+04

FQUVN-A

0.00028

3765.4

73.1

0.0082

0.01122

0.26

3766.0

3766.6

3803

19.61

4.7E+05

FQUVN-B

0.00028

3830.2

57.1

0.0063

0.01465

0.15

3830.7

3831.3

3827

19.61

1.9E+05

FQUVN-C

0.00038

3912.9

59.3

0.0064

0.01949

0.16

3914.4

3915.0

3907

19.94

1.4E+05

FQUVN-D

0.00045

3992.3

63.5

0.0068

0.02244

0.18

3992.9

3993.2

3992

20.13

1.2E+05

FQCH4N-A

0.00075

~5433

~38

0.0028

0.09356

0.04

-

-

5443

20.68

3.3E+04

FQCH4N-B

0.00082

~6193

~44

0.0028

0.11360

0.05

-

-

6205

20.78

2.3E+04

FQCH4N-C

0.00070

~7274

~51

0.0024

0.12165

0.04

-

-

7279

20.48

2.3E+04

FQCH4N-D

0.00022

~8929

~64

0.0067

0.02786

0.39

-

-

8930

19.53

5.2E+04

POLQ_par

0.06005

5570.9

4184.5

0.3190

0.09298

566.81

6076.2

6323.3

6476

25.44

POLQ_per

0.01299

7027.7

5153.2

0.3114

0.03744

681.43

7541.1

7766.0

7839

23.78



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Last updated: 06/16/98 10:38:00