ACDS V10.0 - Mon Apr 29 20:25:55 CEST 2019
 |
Detailed Description of II/293 :
GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)
|
 |
Note : this is the description file of the original catalog.
This HTML page corresponds well to the original description, but some minor
changes in the format may have been introduced in the FITS output
files in order to allow for arithmetic operations on quantities
such as coordinates and times. h:m:s and d:m:s units are normally
converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the
units; the value given in the HTML files supersedes the value indicated in the ReadMe
file for this catalogue.
II/293 GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)
================================================================================
Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE)
Spitzer Science Center
<IPAC, Caltech (2008)>
=2009yCat.2293....0S
================================================================================
ADC_Keywords: Infrared sources ; Photometry, infrared ; Surveys ; Milky Way
Mission_Name: Spitzer
Description:
The Galactic Legacy Infrared Midplane Survey Extraordinaire (GLIMPSE),
is a survey of Galactic Plane central parts made with the Infrared
Array Camera (IRAC) aboard the Spitzer Space Telescope (SST). It
covers approximately 220 square degrees, between galactic longitudes
±65° and ±1° in galactic latitude (up to 4.2° in the
central parts). The four IRAC bands are centered at approximately
3.6, 4.5, 5.8 and 8.0µm.
The GLIMPSE combines the 3 surveys:
* GLIMPSE-I covers the longitude ranges |l|=10--65° and the
latitude range |b|<=1° (Benjamin et al. 2003PASP..115..953B)
* GLIMPSE-II covers the longitude range of |l|<=10°, and a
latitude range |b|<=1° from |l|=5--10, |b|<=1.5 for |l|=2--5,
and |b|<=2° for |l|<=2. GLIMPSE-II coverage excludes the
Galactic center region |l|<=1, |b|<=0.75 observed by the GALCEN
GO program (PID=3677).
* GLIMPSE-3D adds vertical extensions up to |b|=4.2° near the
galactic center, and up to |b|=3° in selected other parts
of the Galaxy (±10, 18.5, 25, 30, and -15 (345)°).
GLIMPSE-II had two-epoch coverage for a total of three visits on the
sky. The observations consisted of two 1.2 second integrations at each
position in the first epoch of data taking (September 2005) and a
single 1.2 second integration at each position six months later
(April 2006).
The highly reliable v2.0 GLIMPSEII Catalog (v2.0_GLMIIC) consists of
point sources that are detected at least twice in one band and at
least once in an adjacent band and a S/N > 5 cut for the band with the
two detections. There are also faint and bright flux limits on the
Catalog entries. The more complete v2.0 Archive (v2.0_GLMIIA) has less
stringent criteria, namely two detections in any bands, those
detections having a S/N > 5. The IRAC data were bandmerged with the
2MASS All-Sky Point Source Catalog. See the GLIMPSEII v2.0 Data
Products & Data Delivery document for more details.
The catalog available from CDS merges the 3 surveys GLIMPSE-I (v2.0),
GLIMPSE-II (v2.0), and GLIMPSE-3D; Catalog and Archive records are
also merged here. In the regions of overlap between the 3 surveys
(e.g. longitude around 10°) preference was given to
(1) GLIMPSE-II, as recommended in the GLIMPSE documents of May 2007
(glimpse1_v2.0.pdf) and April 2008 (glimpse2-v2.0.pdf);
(2) GLIMPSE-I, and (3) GLIMPSE-3D sources. Sources from different
surveys were merged if their position is closer than 0.1arcsec.
Documents and a document describing in detail the point source
photometry steps, see http://www.astro.wisc.edu/glimpse/docs.html
File Summary:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . This file
× glimpse.sam 705 276 Sample of GLIMPSE sources in Galactic Center
See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (2MASS-C) (Cutri+ 2003)
http://irsa.ipac.caltech.edu/data/SPITZER/GLIMPSE : GLIMPSE home page
http://data.spitzer.caltech.edu/ : Access to Spitzer data
Byte-by-byte Description of file: glimpse.sam
Bytes Format Units Label Explanations
1 A1 --- S [123] Survey: 1=GLIMPSE-I, 2=GLIMPSE-II,
and 3=GLIPMSE-3D
2- 7 A6 --- --- [SSTGLM]
8 A1 --- C [CA] High-reliability sources are marked 'C'
(Catalog part, with S/N>5).
10- 26 A17 --- GLIMPSE [G+.0-9-] Source name (GLLL.llll+BB.bbbb)
28- 43 A16 --- 2MASS 2MASS-PSC name JHHMMSSss+DDMMSSs (Cat. II/246)
44 A1 --- m_2MASS Multiplicity on 2MASS name (in 3D survey only)
46- 55 I10 --- 2Mkey ? Unique source identifier (Cntr) in 2MASS
57- 66 F10.6 deg Glon Galactic longitude of source
68- 77 F10.6 deg Glat Galactic latitude of source
81- 84 F4.1 arcsec e_Glon error in Galactic longitude
88- 91 F4.1 arcsec e_Glat error in Galactic latitude
93-102 F10.6 deg RAdeg Right ascension J2000, degrees
104-113 F10.6 deg DEdeg Declination J2000, degrees
117-120 F4.1 arcsec e_RAdeg error in Right ascension
124-127 F4.1 arcsec e_DEdeg error in Declination
131 I1 --- csf [0/6] close source flag (1)
133-138 F6.3 mag Jmag ? 2MASS-PSC J-band magnitude (1.25um)
140-145 F6.3 mag e_Jmag ? 1-{sigma} error on Jmag
147-152 F6.3 mag Hmag ? 2MASS-PSC H-band magnitude (1.65um)
154-159 F6.3 mag e_Hmag ? 1-{sigma} error on Hmag
161-166 F6.3 mag Kmag ? 2MASS-PSC Ks-band magnitude (2.17um)
168-173 F6.3 mag e_Kmag ? 1-{sigma} error on Ksmag
175-180 F6.3 mag 3.6mag ? 3.6um IRAC (Band 1) magnitude
182-187 F6.3 mag e_3.6mag ? 1-{sigma} error on 3.6mag
189-194 F6.3 mag 4.5mag ? 4.5um IRAC (Band 2) magnitude
196-201 F6.3 mag e_4.5mag ? 1-{sigma} error on 4.5mag
203-208 F6.3 mag 5.8mag ? 5.8um IRAC (Band 1) magnitude
210-215 F6.3 mag e_5.8mag ? 1-{sigma} error on 5.8mag
217-222 F6.3 mag 8.0mag ? 8.0um IRAC (Band 1) magnitude
224-229 F6.3 mag e_8.0mag ? 1-{sigma} error on 8.0mag
231-240 E10.4 mJy F(J) ? 2MASS-PSC J-band flux (1.25um)
242-251 E10.4 mJy e_F(J) ? 1-{sigma} error on F(J)
253-262 E10.4 mJy F(H) ? 2MASS-PSC H-band flux (1.65um)
264-273 E10.4 mJy e_F(H) ? 1-{sigma} error on F(H)
275-284 E10.4 mJy F(Ks) ? 2MASS-PSC Ks-band flux (2.17um)
286-295 E10.4 mJy e_F(Ks) ? 1-{sigma} error on F(Ks)
297-306 E10.4 mJy F(3.6) ? 3.6um IRAC (Band 1) flux
308-317 E10.4 mJy e_F(3.6) ? 1-{sigma} error on F(3.6)
319-328 E10.4 mJy F(4.5) ? 4.5um IRAC (Band 2) flux
330-339 E10.4 mJy e_F(4.5) ? 1-{sigma} error on F(4.5)
341-350 E10.4 mJy F(5.8) ? 5.8um IRAC (Band 3) flux
352-361 E10.4 mJy e_F(5.8) ? 1-{sigma} error on F(5.8)
363-372 E10.4 mJy F(8.0) ? 8.0um IRAC (Band 4) flux
374-383 E10.4 mJy e_F(8.0) ? 1-{sigma} error on F(8.0)
385-394 E10.4 mJy rms(3.6) ? rms deviation from final 3.6um flux (2)
396-405 E10.4 mJy rms(4.5) ? rms deviation from final 4.5um flux (2)
407-416 E10.4 mJy rms(5.8) ? rms deviation from final 5.38m flux (2)
418-427 E10.4 mJy rms(8.0) ? rms deviation from final 8.0um flux (2)
429-438 E10.4 MJy/sr sky(3.6) ? Local sky background at 3.6um
440-449 E10.4 MJy/sr sky(4.5) ? Local sky background at 4.5um
451-460 E10.4 MJy/sr sky(5.8) ? Local sky background at 5.8um
462-471 E10.4 MJy/sr sky(8.0) ? Local sky background at 8.0um
474-478 F5.2 --- Jsn ? 2MASS-PSC J-band Signal/Noise ratio
481-485 F5.2 --- Hsn ? 2MASS-PSC H-band Signal/Noise ratio
488-492 F5.2 --- Ksn ? 2MASS-PSC Ks-band Signal/Noise ratio
495-499 F5.2 --- 3.6sn ? IRAC 3.6um band Signal/Noise
502-506 F5.2 --- 4.5sn ? IRAC 4.5um band Signal/Noise
509-513 F5.2 --- 5.8sn ? IRAC 5.8um band Signal/Noise
515-520 F6.2 --- 8.0sn ? IRAC 8.0um band Signal/Noise
523-529 F7.1 arcmin-2 d(3.6) ? Local source density at 3.6um
532-538 F7.1 arcmin-2 d(4.5) ? Local source density at 4.5um
541-547 F7.1 arcmin-2 d(5.8) ? Local source density at 5.8um
550-556 F7.1 arcmin-2 d(8.0) ? Local source density at 8.0um
559-562 I4 --- N(3.6) ? Number of detections in 3.6um IRAC band
565-568 I4 --- N(4.5) ? Number of detections in 4.5um IRAC band
571-574 I4 --- N(5.8) ? Number of detections in 5.8um IRAC band
577-580 I4 --- N(8.0) ? Number of detections in 8.0um IRAC band
583-586 I4 --- n(3.6) ? Number of possible detections in 3.6um band
589-592 I4 --- n(4.5) ? Number of possible detections in 4.5um band
595-598 I4 --- n(5.8) ? Number of possible detections in 5.8um band
601-604 I4 --- n(8.0) ? Number of possible detections in 8.0um band
608-615 A8 --- q_Jmag ? [0-9a-f] 2MASS-PSC Quality Flag (3)
619-626 A8 --- q_Hmag ? [0-9a-f] 2MASS-PSC Quality Flag (3)
630-637 A8 --- q_Kmag ? [0-9a-f] 2MASS-PSC Quality Flag (3)
641-648 A8 --- q_3.6mag ? [0-9a-f] 3.6um IRAC Quality Flag (3)
652-659 A8 --- q_4.5mag ? [0-9a-f] 4.5um IRAC Quality Flag (3)
663-670 A8 --- q_5.8mag ? [0-9a-f] 5.8um IRAC Quality Flag (3)
674-681 A8 --- q_8.0mag ? [0-9a-f] 8.0um IRAC Quality Flag (3)
685-687 A3 --- m(3.6) ? [0-9a-f] Method used for 3.6um flux (4)
691-693 A3 --- m(4.5) ? [0-9a-f] Method used for 4.5um flux (4)
697-699 A3 --- m(5.8) ? [0-9a-f] Method used for 5.8um flux (4)
703-705 A3 --- m(8.0) ? [0-9a-f] Method used for 8.0um flux (4)
Note (1): The close source flag is set if there are Archive sources that
are within 3arcsec of the source:
0 = no Archive source within 3.0" of source
1 = Archive sources between 2.5" and 3.0" of source
2 = Archive sources between 2.0" and 2.5" of source
3 = Archive sources between 1.5" and 2.0" of source
4 = Archive sources between 1.0" and 1.5" of source
5 = Archive sources between 0.5" and 1.0" of source
6 = Archive sources within 0.5" of source
Note (2): deviation of individual detections from final flux
(large values may imply variability)
Note (3): the quality flag, written here in hexadecimal, describes
peculiarities which, if existing, contribute to 2b to the
quality flag: for instance, the value '2400' (9216 in decimal,
which is 210+213) means:
* DAOPHOT tweak negative (210)
* confusion in cross-band merge (213)
--------------------------------------------------------------------------
b Explanation Survey
--------------------------------------------------------------------------
0 poor pixels in dark current SSC pmask
1 flat field questionable SSC dmask
2 latent image (a) SSC dmask
2 persistence (p) 2MASS
3 photometric confusion (c) 2MASS
6 muxbleed correction applied GLIMPSE
7 hot, dead or otherwise unacceptable pixel SSC pmask,dmask,GLIMPSE
8 muxbleed correction applied is > 3 above bkg GLIMPSE
8 electronic stripe (s) 2MASS
9 DAOPHOT tweak positive GLIMPSE
10 DAOPHOT tweak negative GLIMPSE
12 confusion in in-band merge GLIMPSE
13 confusion in cross-band merge (IRAC) GLIMPSE
13 confusion in cross-band merge (2MASS) GLIMPSE
14 column pulldown corrected GLIMPSE
15 banding corrected GLIMPSE
16 stray light GLIMPSE
18 data predicted to saturate GLIMPSE
19 saturated star wing region GLIMPSE
19 diffraction spike (d) 2MASS
20 pre-lumping in in-band merge GLIMPSE
21 post-lumping in cross-band merge GLIMPSE
21 post-lumping in cross-band merge 2MASS
22 photometric quality flag (*) 2MASS
23 photometric quality flag (*) 2MASS
24 photometric quality flag (*) 2MASS
29 within three pixels of edge of frame GLIMPSE
31 flux in Archive but not in Catalog entry GLIMPSE (added at CDS)
--------------------------------------------------------------------------
(a) Due to the short exposure time and high sky backgrounds in the
GLIMPSEII fields, we have not seen evidence for latent sources
in the images, even though they are flagged via an automatic
algorithm in SSC's processing.
(*) the 2MASS quality is stored here on 3 bits, with
A (best): all three flags set to 1 (.1c..... in hexa)
B (2nd) : bit pattern 110 (.18..... in hexa)
C (3rd) : bit pattern 101 (.14..... in hexa)
D (4th) : bit pattern 100 (.10..... in hexa)
E (5th) : bit pattern 011 (.0c..... in hexa)
F (6th) : bit pattern 010 (.04..... in hexa)
--------------------------------------------------------------------------
Note (4): the method flag, written here in hexadecimal, describes
the combination of the existence and usage of the frames:
0 = Frame 0.6s present
1 = Frame 0.6s present and used
2 = Frame 1.2s present
3 = Frame 1.2s used for flux calculation
4 = Frame 2s present
5 = Frame 2s used for flux calculation
6 = Frame 12s present
7 = Frame 12s used for flux calculation
8 = Frame 30s present
9 = Frame 30s used for flux calculation
10 = Frame 100s present
11 = Frame 100s used for flux calculation
Nomenclature Notes:
It is recommended to use the GPSC for the sources of GLIMPSE Catalog
(at least 2 detections with S/N>=5), and GPSA (Archive) for those not
meeting these criteria.
Objects in SIMBAD are <SSTGLMC GLLL.llll+BB.bbbb> (for catalog sources;
"C" in column C (S/N>5)) or <SSTGLMA GLLL.llll+BB.bbbb> (for archive sources;
"A" in column C).
Access via cdsclient:
GLIMPSE is available in command line mode as "findglimpse" in the
"cdsclient" package (http://cdsarc.u-strasbg.fr/doc/cdsclient.htx)
================================================================================
(End) Francois Ochsenbein [CDS] 12-Jun-2009