J/AJ/126/2644 CL 0024+1654 UBVI photometry (Alexov+, 2003)
A wide-field, broadband imaging survey of Butcher-Oemler cluster Cl 0024+1654:
the catalog.
Alexov A., Silva D.R., Pierce M.J.
<Astron. J., 126, 2644-2661 (2003)>
=2003AJ....126.2644A 2003AJ....126.2644A
ADC_Keywords: Clusters, galaxy ; Redshifts ; Photometry
Keywords: galaxies: clusters: Cl 0024+1654 - cosmology: observations -
large-scale structure of the Universe
Description:
Wide-field (20x20arcmin2) UBVI images of intermediate-redshift
(z=0.39), Butcher-Oemler cluster CL0024+1654 are being distributed.
These data probe the rest-frame mid-UV properties over a much larger
area than previous studies of CL0024+1654. These images were obtained
with the 0.9m telescope at the NOAO Kitt Peak National Observatory in
1991-1992. The resolution is 0.68 arcsec/pix, and the field-of-view is
20arcmin2. The standard KPNO Harris filter set was used. We are
distributing the individual U, B, V and I frames, as well as the
combined U+B+V+I image.
Using these data, SExtractor was used to construct a multi-color
catalog of approximately 6000 objects in this field. We present both
isophotal and aperture photometry in the catalog to be complete. We
cross-matched the objects in our catalog with three other CL0024
datasets, and list the matching results in the distributed catalog.
Our catalog includes the cross-references to data from
Czoske et al., 2001, Cat. J/A+A/372/391; from
Smail et al., 1997, Cat. J/ApJS/110/213; and from
Dressler et al., 1999, Cat. J/ApJS/122/51.
Objects:
--------------------------------------------------------
RA (2000) DE Designation(s)
--------------------------------------------------------
00 26 35.7 +17 09 43 ZwCl 0024+1652 = ClG 0024+16
--------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 697 5992 The object catalog in ASCII
cl24_cat.fit 2880 770 The object catalog in FITS
cl24ubvi.fit 2880 4157 Reduced, combined U+B+V+I FITS Image
cl0024_u.fit 2880 4157 Reduced U-band FITS Image
cl0024_b.fit 2880 4157 Reduced B-band FITS Image
cl0024_v.fit 2880 4157 Reduced V-band FITS Image
cl0024_i.fit 2880 4157 Reduced I-band FITS Image
--------------------------------------------------------------------------------
See also:
J/A+A/372/391 : Spectroscopic Survey of Cl 0024+1654 (Czoske+, 2001)
J/ApJS/110/213 : Morphological Types in 10 Distant Rich Clusters (Smail+ 1997)
J/ApJS/122/51 : Spectroscopic cat. of 10 rich galaxy clusters (Dressler+ 1999)
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- ID ASP03 ID number (1)
8- 10 I3 --- [CKS2001] ? Czoske et al. (2001, Cat. J/A+A/372/391)
ID (if available)
12- 14 I3 --- [SDC97] ? Smail et al. (1997, Cat. J/ApJS/110/213)
ID (if available), [SDC97] c NNNN
16- 18 I3 --- [DSP99] ? Dressler et al. (1999, Cat. J/ApJS/122/51)
ID (if available), [DSP99] Cl 0024+16 NNN
20- 27 F8.3 pix Xpos Object position along x
29- 36 F8.3 pix Ypos Object position along y
38- 41 F4.2 --- CLASS SExtractor stellarity from U+B+V+I frame
43- 51 F9.4 arcsec oRA Right ascension offset from cluster center (2)
53- 61 F9.4 arcsec oDE Declination offset from cluster center (2)
63- 64 I2 --- f_Umagiso SExtractor flags from U frame (6)
66- 67 I2 --- f_Bmagiso SExtractor flags from B frame (6)
69- 70 I2 --- f_Vmagiso SExtractor flags from V frame (6)
72- 73 I2 --- f_Imagiso SExtractor flags from I frame (6)
75- 81 F7.4 mag UBVImag U+B+V+I isophotal magnitude
83- 88 F6.4 mag e_UBVImag U+B+V+I isophotal magnitude uncertainty
90- 96 F7.4 mag Umagiso ?=99.0000 U isophotal magnitude
98-104 F7.4 mag e_Umagiso ?=99.0000 U isophotal magnitude uncertainty (3)
106-112 F7.4 mag Bmagiso ?=99.0000 B isophotal magnitude
114-120 F7.4 mag e_Bmagiso ?=99.0000 B isophotal magnitude uncertainty (3)
122-128 F7.4 mag Vmagiso ?=99.0000 V isophotal magnitude
130-136 F7.4 mag e_Vmagiso ?=99.0000 V isophotal magnitude uncertainty
138-144 F7.4 mag Imagiso ?=99.0000 I isophotal magnitude
146-152 F7.4 mag e_Imagiso ?=99.0000 I isophotal magnitude uncertainty
154-160 F7.4 mag U-Biso ?=99.0000 U-B isophotal colour index
162-168 F7.4 mag B-Viso ?=99.0000 B-V isophotal colour index
170-176 F7.4 mag V-Iiso ?=99.0000 V-I isophotal colour index
178-184 F7.4 mag B-Iiso ?=99.0000 B-I isophotal colour index
186-192 F7.4 mag Umag3 ?=99.0000 U (D=3pix) aperture magnitude (4)
194-200 F7.4 mag e_Umag3 ?=99.0000 U (D=3pix) aperture mag.
uncertainty (5)
202-208 F7.4 mag Bmag3 ?=99.0000 B (D=3pix) aperture magnitude
210-216 F7.4 mag e_Bmag3 ?=99.0000 B (D=3pix) aperture mag. uncertainty
218-224 F7.4 mag Vmag3 ?=99.0000 V (D=3pix) aperture magnitude
226-232 F7.4 mag e_Vmag3 ?=99.0000 V (D=3pix) aperture mag. uncertainty
234-240 F7.4 mag Imag3 ?=99.0000 I (D=3pix) aperture magnitude
242-248 F7.4 mag e_Imag3 ?=99.0000 I (D=3pix) aperture mag. uncertainty
250-256 F7.4 mag Umag4 ?=99.0000 U (D=4pix) aperture magnitude
258-264 F7.4 mag e_Umag4 ?=99.0000 U (D=4pix) aperture mag. uncertainty
266-272 F7.4 mag Bmag4 ?=99.0000 B (D=4pix) aperture magnitude
274-280 F7.4 mag e_Bmag4 ?=99.0000 B (D=4pix) aperture mag. uncertainty
282-288 F7.4 mag Vmag4 ?=99.0000 V (D=4pix) aperture magnitude
290-296 F7.4 mag e_Vmag4 ?=99.0000 V (D=4pix) aperture mag. uncertainty
298-304 F7.4 mag Imag4 ?=99.0000 I (D=4pix) aperture magnitude
306-312 F7.4 mag e_Imag4 ?=99.0000 I (D=4pix) aperture mag. uncertainty
314-320 F7.4 mag Umag5 ?=99.0000 U (D=5pix) aperture magnitude
322-328 F7.4 mag e_Umag5 ?=99.0000 U (D=5pix) aperture mag. uncertainty
330-336 F7.4 mag Bmag5 ?=99.0000 B (D=5pix) aperture magnitude
338-344 F7.4 mag e_Bmag5 ?=99.0000 B (D=5pix) aperture mag. uncertainty
346-352 F7.4 mag Vmag5 ?=99.0000 V (D=5pix) aperture magnitude
354-360 F7.4 mag e_Vmag5 ?=99.0000 V (D=5pix) aperture mag. uncertainty
362-368 F7.4 mag Imag5 ?=99.0000 I (D=5pix) aperture magnitude
370-376 F7.4 mag e_Imag5 ?=99.0000 I (D=5pix) aperture mag. uncertainty
378-384 F7.4 mag Umag6 ?=99.0000 U (D=6pix) aperture magnitude
386-392 F7.4 mag e_Umag6 ?=99.0000 U (D=6pix) aperture mag. uncertainty
394-400 F7.4 mag Bmag6 ?=99.0000 B (D=6pix) aperture magnitude
402-408 F7.4 mag e_Bmag6 ?=99.0000 B (D=6pix) aperture mag. uncertainty
410-416 F7.4 mag Vmag6 ?=99.0000 V (D=6pix) aperture magnitude
418-424 F7.4 mag e_Vmag6 ?=99.0000 V (D=6pix) aperture mag. uncertainty
426-432 F7.4 mag Imag6 ?=99.0000 I (D=6pix) aperture magnitude
434-440 F7.4 mag e_Imag6 ?=99.0000 I (D=6pix) aperture mag. uncertainty
442-448 F7.4 mag Umag7 ?=99.0000 U (D=7pix) aperture magnitude
450-456 F7.4 mag e_Umag7 ?=99.0000 U (D=7pix) aperture mag. uncertainty
458-464 F7.4 mag Bmag7 ?=99.0000 B (D=7pix) aperture magnitude
466-472 F7.4 mag e_Bmag7 ?=99.0000 B (D=7pix) aperture mag. uncertainty
474-480 F7.4 mag Vmag7 ?=99.0000 V (D=7pix) aperture magnitude
482-488 F7.4 mag e_Vmag7 ?=99.0000 V (D=7pix) aperture mag. uncertainty
490-496 F7.4 mag Imag7 ?=99.0000 I (D=7pix) aperture magnitude
498-504 F7.4 mag e_Imag7 ?=99.0000 I (D=7pix) aperture mag. uncertainty
506-512 F7.4 mag Umag8 ?=99.0000 U (D=8pix) aperture magnitude
514-520 F7.4 mag e_Umag8 ?=99.0000 U (D=8pix) aperture mag. uncertainty
522-528 F7.4 mag Bmag8 ?=99.0000 B (D=8pix) aperture magnitude
530-536 F7.4 mag e_Bmag8 ?=99.0000 B (D=8pix) aperture mag. uncertainty
538-544 F7.4 mag Vmag8 ?=99.0000 V (D=8pix) aperture magnitude
546-552 F7.4 mag e_Vmag8 ?=99.0000 V (D=8pix) aperture mag. uncertainty
554-560 F7.4 mag Imag8 ?=99.0000 I (D=8pix) aperture magnitude
562-568 F7.4 mag e_Imag8 ?=99.0000 I (D=8pix) aperture mag. uncertainty
570-576 F7.4 mag Umag9 ?=99.0000 U (D=9pix) aperture magnitude
578-584 F7.4 mag e_Umag9 ?=99.0000 U (D=9pix) aperture mag. uncertainty
586-592 F7.4 mag Bmag9 ?=99.0000 B (D=9pix) aperture magnitude
594-600 F7.4 mag e_Bmag9 ?=99.0000 B (D=9pix) aperture mag. uncertainty
602-608 F7.4 mag Vmag9 ?=99.0000 V (D=9pix) aperture magnitude
610-616 F7.4 mag e_Vmag9 ?=99.0000 V (D=9pix) aperture mag. uncertainty
618-624 F7.4 mag Imag9 ?=99.0000 I (D=9pix) aperture magnitude
626-632 F7.4 mag e_Imag9 ?=99.0000 I (D=9pix) aperture mag. uncertainty
634-640 F7.4 mag Umag10 ?=99.0000 U (D=10pix) aperture magnitude
642-648 F7.4 mag e_Umag10 ?=99.0000 U (D=10pix) aperture mag. uncertainty
650-656 F7.4 mag Bmag10 ?=99.0000 B (D=10pix) aperture magnitude
658-664 F7.4 mag e_Bmag10 ?=99.0000 B (D=10pix) aperture mag. uncertainty
666-672 F7.4 mag Vmag10 ?=99.0000 V (D=10pix) aperture magnitude
674-680 F7.4 mag e_Vmag10 ?=99.0000 V (D=10pix) aperture mag. uncertainty
682-688 F7.4 mag Imag10 ?=99.0000 I (D=10pix) aperture magnitude
690-696 F7.4 mag e_Imag10 ?=99.0000 I (D=10pix) aperture mag. uncertainty
-------------------------------------------------------------------------------
Note (1): ID numbers for cross-matches are given if available.
When there was no cross-identification, the value of UNDEF was used in
the FITS version of the catalog, and zero (0) in the ascii version of
the catalog. There are no zero (0) ID numbers in any of the catalogs
with which we have cross-referenced IDs; therefore, this is the
easiest number to use instead of UNDEF in ascii.
Note (2): Positions are given relative to 00:26:35.68 +17:09:43.4 (J2000).
Note (3): After publication of the paper, we found four (4) SExtractor
Isophotal Magnitude Uncertainty values greater than (>) 99.0, which,
in theory, should not exist. We replaced the ERRISO of these four
cases to the value 99.0, indicating the highest possible uncertainty
setting. ASP03 ID numbers for these corrections are:
#2 U-filter ISO MAG ERR
#1605 U-filter ISO MAG ERR
#5947 U-filter ISO MAG ERR
#5817 B-filter ISO MAG ERR
We also note that these four objects may have been included in our
"good" sample in the publication. This is because we expected invalid
magnitudes to have uncertainties equal (≡) to 99.0, not GREATER than
99.0, and therefore, would have included these cases.
Note (4): Aperture magnitudes are measured with circular apertures with
indicated diameters (D) in pixels.
Note (5): Similarly to Note (3) above, we found many SExtractor
aperture magnitude uncertainty values greater than (>) 99.0. All
these cases were set to values of 99.0. Since none of our science
calculations were done using aperture photometry, we refrain from
listing the ASP03 ID numbers of the corrections here.
Note (6): The SExtractor flags are a combination (addition) of:
1: The object has neighbours, bright and close enough to
significantly bias the MAG_AUTO photometry, or bad pixels
(more than 10% of the integrated area affected)
2: The object was originally blended with another one
4: At least one pixel of the object is saturated (or very close to)
8: The object is truncated (too close to an image boundary)
16: Object's aperture data are incomplete or corrupted
--------------------------------------------------------------------------------
Acknowledgements:
Marion Schmitz from NASA/IPAC Extragalactic Database Group, who pointed
out uncertainty values >99.0. He also found a problem of uncertainties
≡ 0.0 (perfect); the catalog was re-created with higher precision in
order to show that these "perfect" uncertainties were in fact non-zero
at the 3rd or 4th significant digit.
Francois Ochsenbein from CDS for helping with describing the FITS
catalog in a byte-by-byte format.
(End) Anastasia Alexov [Caltech, IPAC], David Silva [ESO] 15-Feb-2004