Photometric Calibration

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Photometric Calibration. Jorge F. Garc í a Yus GEMINI Observatory Barolo 2001. GSC-II Photometric Calibration. Calibrators: GSPC-I B, V magnitudes and brighter than 15 th TYCHO B Tycho , V Tycho magnitudes and brighter than 11.5 th GSPC-II B, V, R magnitudes and fainter as 20 th - PowerPoint PPT Presentation

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  • Photometric CalibrationJorge F. Garca YusGEMINI ObservatoryBarolo 2001

  • GSC-II Photometric CalibrationCalibrators:GSPC-IB, V magnitudes and brighter than 15thTYCHOBTycho, VTycho magnitudes and brighter than 11.5th GSPC-IIB, V, R magnitudes and fainter as 20thColor transformations:One pair for each pass band availableRange of validate

  • Cont.Photographic plate material and filters:IIIaJ+GG385, IIIaF+RG610, IIIaJ+GG395, IIIaF+OG590Scanning and digitalization:GAMMA 1 and GAMMA 2, laser and white light Pipeline data processing:SKYPROCESSORINVENTORYDEBLENDERFINDCATPHOTOSOLAPPLY_CALYB

  • GSC 2 Photometric Calibration: from GSH files

    S #star

    0

    1

    5

    11

    19

    24

    46

    37

    46

    31

    30

    7

    16

    12

    3

    4

    11

    16

    15

    23

    13

    28

    24

    18

    19

    14

    12

    13

    16

    10

    14

    9

    15

    16

    11

    11

    13

    5

    7

    5

    11

    9

    6

    4

    6

    2

    6

    1

    3

    1

    his

    Number of calibrators

    S (blue suthern survey)

    s_nstar

    100

    301

    505

    7011

    9019

    11024

    13046

    15037

    17046

    19031

    21030

    2307

    25016

    27012

    2903

    3104

    33011

    35016

    37015

    39023

    41013

    43028

    45024

    47018

    49019

    51014

    53012

    55013

    57016

    59010

    61014

    6309

    65015

    67016

    69011

    71011

    73013

    7505

    7707

    7905

    81011

    8309

    8506

    8704

    8906

    9102

    9306

    9501

    9703

    9901

  • Number of calibrators per field

    Chart1

    0

    3

    8

    7

    15

    26

    42

    69

    58

    68

    43

    55

    58

    38

    26

    32

    15

    16

    15

    10

    11

    7

    3

    4

    2

    2

    0

    4

    1

    5

    3

    1

    1

    1

    1

    0

    3

    1

    1

    0

    1

    4

    1

    5

    1

    2

    1

    2

    0

    2

    Number of calibrators

    ER (red southern survey)

    er_nstar

    100

    303

    508

    707

    9015

    11026

    13042

    15069

    17058

    19068

    21043

    23055

    25058

    27038

    29026

    31032

    33015

    35016

    37015

    39010

    41011

    4307

    4503

    4704

    4902

    5102

    5300

    5504

    5701

    5905

    6103

    6301

    6501

    6701

    6901

    7100

    7303

    7501

    7701

    7900

    8101

    8304

    8501

    8705

    8901

    9102

    9301

    9502

    9700

    9902

  • Statistic are over estimated by known problems.Stars with more than one color, calibrators with poor astrometry and multiple observations.

    Chart1

    27

    2

    2

    10

    13

    17

    24

    33

    38

    41

    37

    39

    32

    41

    41

    29

    25

    28

    24

    26

    30

    19

    19

    15

    7

    19

    16

    15

    13

    5

    6

    10

    7

    10

    7

    3

    3

    6

    6

    4

    6

    6

    2

    7

    3

    1

    5

    7

    4

    3

    Number of calibrators

    XJ (blue northern survey)

    xj_nstar

    1027

    302

    502

    7010

    9013

    11017

    13024

    15033

    17038

    19041

    21037

    23039

    25032

    27041

    29041

    31029

    33025

    35028

    37024

    39026

    41030

    43019

    45019

    47015

    4907

    51019

    53016

    55015

    57013

    5905

    6106

    63010

    6507

    67010

    6907

    7103

    7303

    7506

    7706

    7904

    8106

    8306

    8502

    8707

    8903

    9101

    9305

    9507

    9704

    9903

  • Inconsistence in early reference catalogs version.

    Chart1

    0

    2

    3

    6

    14

    13

    30

    33

    25

    47

    43

    50

    51

    45

    54

    31

    28

    43

    23

    30

    27

    19

    16

    16

    16

    10

    10

    9

    11

    8

    10

    10

    6

    6

    5

    8

    6

    9

    8

    2

    7

    8

    7

    5

    6

    3

    0

    5

    4

    1

    Number of calibrators

    XP (red northern survey)

    xp_nstar

    100

    302

    503

    706

    9014

    11013

    13030

    15033

    17025

    19047

    21043

    23050

    25051

    27045

    29054

    31031

    33028

    35043

    37023

    39030

    41027

    43019

    45016

    47016

    49016

    51010

    53010

    5509

    57011

    5908

    61010

    63010

    6506

    6706

    6905

    7108

    7306

    7509

    7708

    7902

    8107

    8308

    8507

    8705

    8906

    9103

    9300

    9505

    9704

    9901

  • UKST southern hemisphere material: IIIaJ+GG395 (blue) and IIIaF+OG590 (red)

    Chart1

    3

    1

    0

    2

    1

    4

    14

    15

    11

    19

    15

    12

    19

    38

    36

    88

    155

    234

    104

    3

    magnitude limit

    S plates

    s_faint

    12.253

    12.751

    13.250

    13.752

    14.251

    14.754

    15.2514

    15.7515

    16.2511

    16.7519

    17.2515

    17.7512

    18.2519

    18.7538

    19.2536

    19.7588

    20.25155

    20.75234

    21.25104

    21.753

    Chart1

    2

    0

    4

    4

    4

    14

    11

    12

    10

    17

    10

    37

    53

    98

    138

    188

    136

    17

    0

    0

    magnitude limit

    ER(XS) plates

    er_faint

    12.252

    12.750

    13.254

    13.754

    14.254

    14.7514

    15.2511

    15.7512

    16.2510

    16.7517

    17.2510

    17.7537

    18.2553

    18.7598

    19.25138

    19.75188

    20.25136

    20.7517

    21.250

    21.750

  • POSS-II northern hemisphere material: IIIaJ+GG385 (blue) and IIIaF+RG610 (red)

    Chart1

    6

    1

    2

    2

    0

    3

    1

    7

    4

    10

    4

    21

    24

    25

    50

    114

    219

    260

    142

    0

    magnitude limit

    XJ plates

    xj_faint

    12.256

    12.751

    13.252

    13.752

    14.250

    14.753

    15.251

    15.757

    16.254

    16.7510

    17.254

    17.7521

    18.2524

    18.7525

    19.2550

    19.75114

    20.25219

    20.75260

    21.25142

    21.750

    Chart1

    1

    1

    0

    3

    2

    4

    6

    7

    14

    27

    30

    40

    99

    180

    238

    181

    58

    3

    0

    0

    magnitude limit

    XP plates

    xp_faint

    12.251

    12.751

    13.250

    13.753

    14.252

    14.754

    15.256

    15.757

    16.2514

    16.7527

    17.2530

    17.7540

    18.2599

    18.75180

    19.25238

    19.75181

    20.2558

    20.753

    21.250

    21.750

  • POSS-II special constrains: location of original photometric calibrators are vignetted

    Chart1

    450

    126

    120

    65

    43

    25

    35

    17

    18

    9

    14

    1

    0

    0

    distance from the center (deg)

    XJ plates

    xj_center

    0.125450

    0.375126

    0.625120

    0.87565

    1.12543

    1.37525

    1.62535

    1.87517

    2.12518

    2.3759

    2.62514

    2.8751

    3.1250

    3.3750

    Chart1

    378

    130

    117

    48

    71

    41

    33

    23

    25

    14

    11

    5

    1

    0

    distance from the center (deg)

    XP plates

    xp_center

    0.125378

    0.375130

    0.625117

    0.87548

    1.12571

    1.37541

    1.62533

    1.87523

    2.12525

    2.37514

    2.62511

    2.8755

    3.1251

    3.3750

  • GSC 2.2.01 data: photometric analyze From 1715 square degrees (full sky coverage)Rejected 77 southern fields where J magnitude are not present (+/- 10 galactic latitude, SMC and LMC) ~5%Founded and rejected 32, plates with suspicious photometry. (mainly large color residuals)Total for analyze 1606 plates or 1606 square degrees

  • FaintArt.#s#caldiserrPlateDateComment19.519.638050.70.10XJ0057-JAN-200018.718.748550.60.11XP00523-NOV-199919.819.715780.10.11XJ00719-DEC-200019.118.714060.10.13XP0077-JAN-200017.216.915150.20.11XJ0167-JAN-2000No faint GSPC216.215.915410.20.13XP0167-JAN-2000No faint GSPC217.116.814130.10.09XJ01720-DEC-1999No faint GSPC217.717.522930.10.13XP01714-OCT-1999No faint GSPC219.819.814040.30.10XJ0207-JAN-200018.518.414240.30.13XP0207-JAN-200020.820.736990.20.17XJ05720-DEC-199918.618.738060.10.13XP05717-JAN-200020.220.116980.20.15XJ0746-SEP-200010.911.31860.00.14XP0741-NOV-1999No GSPC220.620.716270.00.11XJ21919-DEC-200019.819.913560.10.11XP21918-JUL-200121.021.239582.50.15XJ28828-OCT-199917.417.22770.30.18XP28827-DEC-2000No faint GSPC219.219.367750.10.12XJ3408-MAR-2000 low galactic latitude17.617.5011740.00.19XP34021-JUN-2000No faint GSPC220.320.512801.20.18XJ4286-JAN-200019.719.715041.00.14XP4286-DEC-199920.420.246750.10.10XJ49323-AUG-200019.219.326100.00.11XP49320-OCT-199920.820.823240.20.10XJ5337-JAN-200018.718.722720.30.13XP5337-DEC-199920.320.411660.40.11XJ59911-JAN-200018.418.311770.40.12XP59916-JAN-200118.418.121340.20.08XJ6531-FEB-200017.417.221500.20.12XP65316-DEC-1999No fai