DEEP3 Galaxy Redshift Survey

 

The DEEP3 redshift catalog includes a new tag, not contained in the DEEP2 redshift catalog. This tag is EGSFLAGS, which provides information about which objects belong

to which input target list --- unlike DEEP2, which was optically-selected to be R < 24.1, DEEP3 is targeting a variety of sources pulled from a variety of target lists. The table below shows the breakdown of the flag values (and associated target lists). Note

that the targeting rates listed are approximate and that they varied from survey to survey both due to varying target priorities and varying coverage (e.g. many Chandra sources fell at the ends of the slitmasks and thus didn't get an equal chance to be assigned a slit).


The EGSFLAGS value is a LONG integer value, containing the bitwise OR of all of the flag values pertaining to an object. Many objects will have been eligible for targeting based on multiple reasons (e.g. a source might be both a "FIDEL 24um priority 1" source and a "DEEP2 previously untargeted" object). In such cases, all of the relevant flags are set --- for example, a Chandra source which is also a power-law AGN candidate will have both the 2^4 and 2^10 bits set.

To test if a given bit is set (e.g. bit 2^5), you can use the following code in IDL:


    IDL> zcat = mrdfits('zcat.egs.fits.gz', 1)

    IDL> isbit5set = (zcat.egsflags AND 2L^5b) ne 0


If isbit5set is 1, then the bit is set. If it is 0, then it is not.

EGSFLAGS Value

Target Sample

Fraction Selected

Number Selected

Number in DEEP3 Area

0.878

0.787

0.930

0.900

0.740

0.605

0.776

0.938

0.495

0.750

0.712

0.856

1.000

1.000

0.000

1.000

0.618

0.471

0.048

1.000

0.333

0.738

...

...

...

294

74

120

18

154

267

97

61

45

3

57

77

30

3

0

7

4609

1221

1488

12

1

31

...

...

...

335

394

129

20

208

441

125

65

91

4

80

90

30

3

0

7

7454

2596

30,868

12

3

42

...

...

...

FIDEL 70um priority 1

FIDEL 70um priority 2

FIDEL 24um priority 1

FIDEL 24um priority 2

Chandra

C. Conselice’s massive galaxies

  1. R.Ivison’s 20cm sources

M. Im’s bright 15um sources

  1. M.Im’s faint 15um sources

  2. J.Huang’s IRS sources

  3. S.Park’s power-law AGN

  4. S.Willner’s 6cm sources

  5. D.Rosario’s IRAC AGN

Moustakas/Dutton lenses

  1. C.Willmer’s IRS object

  2. B.Gerke’s dual-AGN

DEEP2 objects - prev. untargeted

DEEP2 objects - prev. targeted

faint extension (from CFHTLS)

DEEP2 lens reobservations

SNLS SN hosts - high priority

SNLS SN hosts - low priority

new (2009) AEGIS-X objects

yet newer (2010) AEGIS-X objects

H. Yan’s high-z candidates

2^0

2^1

2^2

2^3

2^4

2^5

2^6

2^7

2^8

2^9

2^10

2^11

2^12

2^13

2^14

2^15

2^16

2^17

2^18

2^19

2^20

2^21

2^22

2^23

2^24