GLIMPSE Image Atlas Release - 20050506 Summary 1.1 x 0.8 deg 0.6" pixel mosaic fits files and quick look 3-color jpegs for l=314.95 to 318.05 deg 3.1 x 2.4 deg 1.2" pixel mosaic fits files and quick look 3-color jpeg for l=313.95 to 317.05 deg ===================================================================== 1. Overview ===================================================================== The GLIMPSE 20050506 data release is comprised of mosaiced images for each IRAC band and quick-look 3-color (bands 1,3 and 4) jpeg files. We provide two sizes of mosaic fits files: 1.1 x 0.8 deg 0.6" pixel mosaics and 3.1 x 2.4 deg 1.2" pixel mosaics. The mosaicked images for each band are standard 32-bit IEEE floating point FITS files with Galactic coordinates. The units of the mosaic fits files are MJy/sr. GLIMPSE image processing for the mosaic image products include a column pulldown correction for bands 1 and 2 and a banding correction for band 3 and 4 data. Hot, dead, missing and saturated data pixels are masked. Outlier (cosmic ray) pixels and most of the stray light areas are masked. Artifacts in areas that have only single-frame coverage (e.g. outside latitudes +- 1 deg) remain in the mosaic so there are no gaps in coverage. See the GLIMPSE Data Products Document for more details (http://www.astro.wisc.edu/glimpse/glimpse_dataprod_v1.5.pdf). One set of mosaic images is 1.1 deg x 0.8 deg (6640 x 4840 pixels) for the SURVEY region. Each file is about 128 Megabytes in size. There are three mosaics per one degree galactic longitude interval with 0.1 deg overlap in longitude and 0.05 deg overlap in latitude between mosaics. For example, for the Galactic longitude of 308 deg, the centers of the three mosaics are (308.5 deg, +0.75 deg), (308.5 deg, 0.0 deg), and (308.5 deg, -0.75 deg). The longitude range is 307.95 deg to 309.05 deg for each of the three mosaics. The latitude ranges are 0.35 deg to 1.15 deg, -0.40 deg to +0.40 deg, and -1.15 deg to -0.35 deg. Filenames are GLM_lcbc_mosaic_Ich.fits, where lc and bc are the Galactic longitude and latitude of the center of the mosaic image, I denotes IRAC, and ch is the IRAC channel number. For example, GLM_30850+075_mosaic_I1.fits is a 1.1 deg x 0.8 deg IRAC channel 1 mosaic centered on l=308.50 deg, b=0.75 deg. We provide 3-color jpeg images for each 1.1 deg x 0.8 deg area, combining bands 1, 3, and 4, to be used for quick look purposes. The filename for this jpeg file is similar to the mosaic fits file: e.g. GLM_30850+075.jpg. The other set of mosaics covers a larger area: 3.1 x 2.4 deg (9320 x 7220 pixels) at 1.2" per pixel. Each file is about 270 Megabytes in size. There is a 0.1 deg overlap in longitude between these mosaics. The file naming convention is the same: GLM_lcbc_mosaic_Ich.fits. We also provide the quicklook 3.1 x 2.4 deg 3-color jpeg images. The filename is similar to the other jpeg images, with "_3x2" appended: e.g. GLM_30950+000_3x2.jpg. IMPORTANT NOTE: The filenames for the 3.1 x 2.4 deg mosaic fits files are the same as some of the the b=0.0 deg 1.1 x 0.8 deg mosaics due to the way we determine our filenames (lcbc). The files are in separate directories but it could potentially cause a problem. ===================================================================== 2. Files in the GLIMPSE 20050506 Release. ===================================================================== In this data delivery, there are 40 mosaic fits files and 10 jpegs. A. GLIMPSE.20050506.README - This file. B. 1.1 deg x 0.8 deg Mosaic images of the l=314.95 to 318.05 deg, b= +-1.15 deg of the GLIMPSE SURVEY region; 0.6" pixels in the 1.1x0.8_mosaics/ directory: Each mosaic fits file is about 128 MBytes. jpeg files are around 250 KBytes per file. (ch 1,3,4) mosaic fits file associated jpg file longitudes covered latitudes covered ---------------------------- -------------------- ------------------ ----------------- GLM_31550+075_mosaic_I1.fits GLM_31550+075.jpg 314.95 to 316.05 0.35 to 1.15 GLM_31550+075_mosaic_I2.fits GLM_31550+075_mosaic_I3.fits GLM_31550+075_mosaic_I4.fits GLM_31550+000_mosaic_I1.fits GLM_31550+000.jpg 314.95 to 316.05 -0.40 to 0.40 GLM_31550+000_mosaic_I2.fits GLM_31550+000_mosaic_I3.fits GLM_31550+000_mosaic_I4.fits GLM_31550-075_mosaic_I1.fits GLM_31550-075.jpg 314.95 to 316.05 -1.15 to -0.35 GLM_31550-075_mosaic_I2.fits GLM_31550-075_mosaic_I3.fits GLM_31550-075_mosaic_I4.fits GLM_31650+075_mosaic_I1.fits GLM_31650+075.jpg 315.95 to 317.05 0.35 to 1.15 GLM_31650+075_mosaic_I2.fits GLM_31650+075_mosaic_I3.fits GLM_31650+075_mosaic_I4.fits GLM_31650+000_mosaic_I1.fits GLM_31650+000.jpg 315.95 to 317.05 -0.40 to 0.40 GLM_31650+000_mosaic_I2.fits GLM_31650+000_mosaic_I3.fits GLM_31650+000_mosaic_I4.fits GLM_31650-075_mosaic_I1.fits GLM_31650-075.jpg 315.95 to 317.05 -1.15 to -0.35 GLM_31650-075_mosaic_I2.fits GLM_31650-075_mosaic_I3.fits GLM_31650-075_mosaic_I4.fits GLM_31750+075_mosaic_I1.fits GLM_31750+075.jpg 316.95 to 318.05 0.35 to 1.15 GLM_31750+075_mosaic_I2.fits GLM_31750+075_mosaic_I3.fits GLM_31750+075_mosaic_I4.fits GLM_31750+000_mosaic_I1.fits GLM_31750+000.jpg 316.95 to 318.05 -0.40 to 0.40 GLM_31750+000_mosaic_I2.fits GLM_31750+000_mosaic_I3.fits GLM_31750+000_mosaic_I4.fits GLM_31750-075_mosaic_I1.fits GLM_31750-075.jpg 316.95 to 318.05 -1.15 to -0.35 GLM_31750-075_mosaic_I2.fits GLM_31750-075_mosaic_I3.fits GLM_31750-075_mosaic_I4.fits C. 3.1 deg x 2.4 deg Mosaic images of l=313.95 to 317.05 deg, b= +-1.2 deg of the GLIMPSE SURVEY region; 1.2" pixels in the 3.1x2.4_mosaics/ directory Each mosaic fits file is about 270 MBytes. jpeg files are around 550 KBytes per file. (ch 1,3,4) mosaic fits file associated jpg file longitudes covered ---------------------------- ---------------------- ------------------- GLM_31550+000_mosaic_I1.fits GLM_31550+000_3x2.jpg 313.95 to 317.05 deg GLM_31550+000_mosaic_I2.fits GLM_31550+000_mosaic_I3.fits GLM_31550+000_mosaic_I4.fits D. Total size of files in the data delivery The GLM*mosaics*fits and have been gzipped. The gzipped size totals about 4.7 Gigs. Unzipped they are about 5.6 Gigs. E. Documentation use GLIMPSE Data Products Document v1.5 glimpse_dataprod_v1.5.pdf, glimpse_dataprod_v1.5.ps ===================================================================== 3. Miscellaneous Information ===================================================================== SSC pipeline version used for the l315.0-318.0 data is S9.5.0.