IRS-COSMOS Delivery Version 1 Products (August 2011) H.Fu + IRS-COSMOS team Telescope: Spitzer ReqModeName: IRSStare PI: Nick Scoville Program Title: IRS-COSMOS Program IDs: 50286 IRS Modules: SL1, LL2, LL1 Release: -------- README (this file) mips?????.tbl reduced IRS spectra of 53 targets Spectra: The IRS spectra and auxiliary multiwavelength data are described in details in Fu et al. (2010, ApJ, 722, 653). The low-resolution IRS spectra (R ~ 60-130) were taken in January 2009. We used the Short Low module in 1st order (SL1, 7.4-14.5 um) and the Long Low module in 1st (LL1, 19.5-38 um) and 2nd order (LL2, 14.0-21.3 um) to continuously cover a wavelength range of 7.4-38 um. All observations were made in the standard staring mode. One cycle consisted of two nod positions offset by 20" and 55" for SL and LL modules, respectively. The number of cycles was adjusted to yield approximately equal signal-to-noise ratios across modules and sources. Between 2 and 25 cycles of 60 s, 2 and 15 cycles of 120 s, 2 and 10 cycles of 120 s were used in SL1, LL2, and LL1, respectively (See Sample Table below). The data were first passed through the S18.7 version of the SSC pipeline. Spectra were then extracted from the BCD files using the IRSLow IDL pipeline (Fadda et al. 2010). Briefly, the pipeline procedure is as follows: (1) After rejecting bad pixels and subtracting background from individual frames, the pipeline combines all of the 2D spectra at different nod positions; (2) Optimal background subtraction is done in the second pass by manually masking off objects from the background-subtracted coadded image; (3) 1D spectra are extracted using PSF (Point Spread Function) fitting with PSF profiles from IRS calibration stars. Lastly, we removed bad portions near the edges of each order from the 1D spectra. The LL spectra of MIPS31635 and MIPS46960 should be discarded. The former is contaminated by a nearby unidentified bright object (likely an asteroid), and the latter is dominated by a featureless continuum 5 times higher than the MIPS 24 um flux. Sample: --------- ---------- -------- -------- ----------- ---------- ---------- | Name | RA | Dec | AOR | S24 (mJy) | Redshift | Source^1 | --------- ---------- -------- -------- ----------- ---------- ---------- mips02176 149.915710 1.879972 27453952 0.743 0.8335 zi mips05264 149.801770 2.383987 27445760 0.860 0.7036 zi mips15123 150.052090 2.126674 27457792 0.888 0.6650 zi mips16913 149.872270 2.289687 27454976 0.781 0.7003 zi mips18902 149.750940 2.469919 27457280 0.794 0.6570 zs mips18984 150.159620 2.474275 27448320 0.790 0.6914 zi mips20765 150.044080 2.643877 27452160 1.172 0.6974 zi mips23930 149.910800 1.662522 27452672 0.750 0.6328 zi mips26741 149.718710 1.849698 27454720 0.850 0.6771 zi mips30035 150.210110 2.311666 27459328 0.868 0.7465 zi mips31181 150.638940 2.464362 27456000 0.869 0.8000 zs mips31635 150.263800 2.541546 27456768 0.809 0.7125 zi mips36942 150.424100 2.122997 27447296 0.750 0.6993 zi mips38331 149.604740 2.452696 27459072 0.819 0.6745 zi mips38754 149.733680 2.575021 27458048 0.814 0.7057 zi mips40291 150.103330 1.661921 27454208 0.773 0.8340 zi mips40410 150.242510 1.766410 27458816 0.732 0.6230 zs mips42682 149.586450 1.769329 27449344 5.020 0.7870 zs mips42997 150.660140 1.863490 27452928 1.049 0.6242 zi mips43504 149.999280 2.006075 27451136 1.424 0.7604 zi mips44180 150.213837 2.188278 27455488 0.857 0.7989 zi mips44883 149.941780 2.395764 27458304 0.761 0.7585 zi mips45149 150.150290 2.475148 27450112 3.822 0.6919 zi mips46960 149.725630 1.810826 27448832 1.227 0.7474 zi mips48730 150.182310 1.700818 27451392 1.791 0.7345 zi mips48760 150.689041 1.757083 27449600 2.132 0.5856 zx mips49150 150.094070 2.299081 27456256 0.869 0.6907 zi mips49207 149.963090 2.431418 27447808 1.087 0.6634 zp mips49223 150.323210 2.449257 27453440 0.939 0.7439 zi mips49946 150.633880 2.593749 27446272 2.163 0.6580 zs mips50424 150.135900 2.120190 27450624 0.752 0.9649 zi mips50513 149.655690 2.600823 27453696 1.183 0.7350 zs mips50519 150.358210 2.638567 27452416 0.833 0.7031 zi mips50717 149.681335 2.681083 27449856 1.187 0.6587 zi mips51182 150.625140 1.802922 27447552 3.039 0.6260 zs mips51359 149.796210 1.774524 27457536 1.168 0.7401 zp mips51415 149.697230 1.905211 27446528 0.836 0.6634 zi mips51416 150.203400 1.902854 27446016 2.585 0.7530 zs mips51427 150.025820 1.926368 27456512 2.378 0.6610 zs mips51429 149.626700 1.931238 27455744 1.222 0.6638 zi mips51477 150.481460 2.011019 27446784 1.149 0.6604 zi mips51489 149.878750 2.031934 27457024 1.079 0.6774 zi mips51497 150.443690 2.049128 27451648 0.884 0.6680 zs mips51523 150.430140 2.086918 27454464 2.063 0.6587 zi mips51538 149.767530 2.117636 27449088 0.972 0.6703 zi mips51604 149.912870 2.200421 27448064 1.837 0.6880 zs mips51645 149.572300 2.262669 27458560 7.116 0.7639 zx mips51653 149.803950 2.288821 27453184 1.159 0.7621 zi mips51728 150.289780 2.400065 27450880 0.711 0.6140 zi mips51739 150.471970 2.410231 27445504 1.120 0.6675 zi mips51852 150.053800 2.589572 27450368 3.391 0.6970 zs mips51916 150.489390 2.688151 27451904 0.757 0.6570 zi mips51982 150.404541 2.780611 27448576 1.326 0.5955 zp --------- ---------- -------- -------- ----------- ---------- ---------- Notes: 1. source of redshift: zi - IRS spectroscopic redshift, zs - optical spectroscopic redshift, zp - photometric redshift from Ilbert et al. (2009), zx - photometric redshift for X-ray detected galaxies from Salvato et al. (2009). Sent questions to and