YEPUN (UT4) NIGHT REPORT - 2002-08-16 ======================================== Shift leader : T. Szeifert Telescope operator : N. Hurtado Weather officer : N. Hurtado Day astronomer : C. Mullis, M. Cioni Night astronomer : C. Lidman, L. Taconi-Garman Visiting astronomer : +----------------+ Night statistics +----------------+ Night start : 23:41 Night end : 09:49 Night length: 10:08 Instrument Mode Time spent -------------------------------------- NACO Commissioning 9:19 Instrument Times: Instrument Mode Science Acqui Calib Stand ---------------------------------------------------------- NACO Commissioning Others / Comments: Total Losses: Instrument Mode Technical Weather Misc --------------------------------------------------------------- NACO Commissioning Instrument Mode Execution Preparation Idle --------------------------------------------------------------- NACO Commissioning Others / Comments: --------------------------------------------------------------- +----------+ Conditions +----------+ Seeing : 0.54-2.0" Wind : 2-10 m/s (N) Humidity : 5% Temperature : 12.5-16.5 degrees Comments : +--------------+ Weather Report +--------------+ 22:30 PH : according to ISAAC and CONICA Zp (Legend: PH-Photometric, CL-Clear, TN-Thin cirrus, TK-Thick cirrus, CY-Cloudy, WI-Windy, HU-Humid, RN-Rain, SN-Snow, EQ-Earthquake, OT-Other ) +----------------+ Setup Activities +----------------+ +------------------+ General Comments +------------------+ Comment: NACO Check IR WFS Cooling -190K Vacuum 7.85e-3 Not so good VIS WFS Cooling -138.1 Vacuum 2e-6 CONICA Detector 27K Vacuum 6.5e-6 Comment: Objective Wheel Alignment In niciInstrumentCONICA.cfg, changed POS1 1507 to 1630 (Absolute 48175 to 48298) POS4 9729 to 9841 (Absolute 56397 to 56509) The element S54 is no longer hilighted when selected? This is not good as the objective name will no longer appear in the header - see test.fits It becomes hilighted when the old value is used. S13 is OK Objective_0001 S27 Objective_0002 S13 Objective_0003 S54 Back to the old values. POS1 1507 POS4 9729 Relative Offsets between the objectives Coro_0001 S27 Coro_0002 S13 Coro_0003 S54 Coro_0004 L27 Coro_0005 L54 Images with the pinhole mask Objective_0004 S54 Objective_0005 S27 Objective_0006 S13 Objective_0007 L27 Objective_0008 L54 Objective_0009 Dark frameComment: Closed telescope at 09:00 UT. +-------------------+ Internal Comments +-------------------+ +--------------------------+ Summary: Action requests +--------------------------+ Submitted to PR number Time lost Short Description ------------------------------------------------------------------------------- Paranal PRS PPRS-00007446 00:00 /vltdata used 86% +-----------------------------+ Action requests and remarks +-----------------------------+ To Paranal: ----------- Create Date: 08/16/02 23:11:01 Submit To: Paranal PRS Short Description: /vltdata used 86% Detailed Problem Description: at wt4tcs /vltdata used 86%. Please clean up. Hours Lost: 00:00 Priority: 2: 24 Hours Problem Type: Software PR Number: PPRS-00007446 Area/Instrument Type: CENTRAL CONTROL System/Instrument: WORKSTATIONS/SERVERS CC List: mriquelm@eso.org To Dataflow: ------------ To USG/QC: ---------- To DFS PRS: ----------- ----------------------------------------- D A Y T I M E C A L I B R A T I O N S ----------------------------------------- ================================================================================ OB ID: 200115617 Program ID: 60.A-9203(E) OB Name:Calibration ================================================================================ *** Instrument : FORS2 *** Classification : Valid *** Comments on this OB : *** Comments internal use : For programs : 69.A-0266,69.B-0716A,169.A-0595 Files produced and additional information: ------------------------------------------ INS.ID FORS2 ==================================================================== OBS.ID 200115617 -------------------------------------------------------------------- template: FORS2_img_cal_bias data product: CALIB/BIAS/IMAGE ccd: 100Kpix/s/2x2/0.70e-/adu files: IMG/SR/NONE 0.0s FORS2_IMG_CAL228.fits IMG/SR/NONE 0.0s FORS2_IMG_CAL228.1-4.fits -------------------------------------------------------------------- template: FORS2_img_cal_bias data product: CALIB/BIAS/IMAGE ccd: 200Kpix/s/2x2/1.25e-/adu files: IMG/SR/NONE 0.0s FORS2_IMG_CAL228.5-9.fits -------------------------------------------------------------------- template: FORS2_img_cal_bias data product: CALIB/BIAS/IMAGE ccd: 200Kpix/s/1x1/1.25e-/adu files: IMG/SR/NONE 0.0s FORS2_IMG_CAL228.10-14.fits -------------------------------------------------------------------- template: FORS2_img_cal_bias data product: CALIB/BIAS/IMAGE ccd: 200Kpix/s/2x2/1.25e-/adu files: IMG/SR/NONE 0.0s FORS2_IMG_CAL228.15-19.fits -------------------------------------------------------------------- template: FORS2_lss_cal_scrflat data product: CALIB/FLAT,LAMP/SPECTRUM ccd: 100Kpix/s/2x2/0.70e-/adu focal plane: lSlit1_0arcsec files: LSS/1.0/SR/GG435/GRIS_1200R 50.0s FORS2_LSS_CAL228.fits LSS/1.0/SR/GG435/GRIS_1200R 50.0s FORS2_LSS_CAL228.1-5.fits -------------------------------------------------------------------- template: FORS2_lss_cal_wave data product: CALIB/WAVE,LAMP/SPECTRUM ccd: 100Kpix/s/2x2/0.70e-/adu focal plane: lSlit1_0arcsec files: LSS/1.0/SR/GG435/GRIS_1200R 75.0s FORS2_LSS_CAL228.6.fits -------------------------------------------------------------------- template: FORS2_specphot_cal_scrflat_fast data product: CALIB/FLAT,LAMP/MOS ccd: 100Kpix/s/2x2/0.70e-/adu mos setup id: 0 nslits 3 (checksum 0) files: MOS/SR/OG590/GRIS_300I 1.3s FORS2_MOS_CAL228.fits MOS/SR/OG590/GRIS_300I 1.3s FORS2_MOS_CAL228.1-5.fits -------------------------------------------------------------------- template: FORS2_specphot_cal_wave_fast data product: CALIB/WAVE,LAMP/MOS ccd: 100Kpix/s/2x2/0.70e-/adu mos setup id: 0 nslits 3 (checksum 0) files: MOS/SR/OG590/GRIS_300I 100.0s FORS2_MOS_CAL228.6.fits -------------------------------------------------------------------- template: FORS2_specphot_cal_scrflat_fast data product: CALIB/FLAT,LAMP/MOS ccd: 100Kpix/s/2x2/0.70e-/adu mos setup id: -35946 nslits 3 (checksum -3595) files: MOS/SR/GG435/GRIS_1200R 10.0s FORS2_MOS_CAL228.7-12.fits -------------------------------------------------------------------- template: FORS2_specphot_cal_wave_fast data product: CALIB/WAVE,LAMP/MOS ccd: 100Kpix/s/2x2/0.70e-/adu mos setup id: -35946 nslits 3 (checksum -3595) files: MOS/SR/GG435/GRIS_1200R 75.0s FORS2_MOS_CAL228.13.fits -------------------------------------------------------------------- template: FORS2_mxu_cal_scrflat data product: CALIB/FLAT,LAMP/MXU ccd: 100Kpix/s/2x2/0.70e-/adu focal plane: M279autopos+903512 files: MXU/SR/OG590/GRIS_300I 1.6s FORS2_MXU_CAL228.fits MXU/SR/OG590/GRIS_300I 1.6s FORS2_MXU_CAL228.1-4.fits -------------------------------------------------------------------- template: FORS2_mxu_cal_wave data product: CALIB/WAVE,LAMP/MXU ccd: 100Kpix/s/2x2/0.70e-/adu focal plane: M279autopos+903512 files: MXU/SR/OG590/GRIS_300I 100.0s FORS2_MXU_CAL228.5.fits -------------------------------------------------------------------- template: FORS2_img_cal_bias data product: CALIB/BIAS/IMAGE ccd: 100Kpix/s/2x2/0.70e-/adu files: IMG/SR/NONE 0.0s FORS2_IMG_CAL228.20-24.fits -------------------------------------------------------------------- template: FORS2_img_cal_scrflat data product: CALIB/FLAT,LAMP/IMAGE ccd: 200Kpix/s/2x2/1.25e-/adu files: IMG/SR/NONE 300.0s FORS2_IMG_CAL228.25.fits -------------------------------------------------------------------- template: FORS2_lss_cal_scrflat data product: CALIB/FLAT,LAMP/SPECTRUM ccd: 100Kpix/s/2x2/0.70e-/adu focal plane: lSlit1_0arcsec files: LSS/1.0/SR/NONE/GRIS_150I 600.0s FORS2_LSS_CAL228.7.fits -------------------------------------------------------------------- ------------------------------------------- N I G H T T I M E A C T I V I T I E S ------------------------------------------- ================================================================================ OB ID: 126237501 Program ID: 60.A-9026(A) OB Name:Twilight flats ================================================================================ *** Instrument : NACO *** Target : Zenith *** Classification : X)Uncertain/Not Applicable *** Comments on this OB : M2 was set for the Cassegrain focus. It is not clear if this affects the flats *** Comments internal use : *** Time Started: 22:08 *** Time Finished: For programs (if calibration): Fulfillment of constraints -------------------------- Requested Fulfilled? Seeing: N/A Airmass: N/A FLI: N/A Moon Distance: N/A Sky Transparency: N/A Files produced and additional information: ========================================== NACO_0001 to 0020 NC20C80 in the sequence H, Ks, NB_2.17 and NB_2.12 NB flats are Odd. Broad band flats are OK. Template finished 13 minutes after sunset After this, it is possible to do J band flats in S54 and S27. We will need two twilight flat templates. NACO_0021 to NACO_0040 S54 J N20C80 - These were done without a tempalte. Telescope was pointing at Zenith. NB. This last set was don with FowlerNsamp ================================================================================ OB ID: 323404001 Program ID: 60.A-9026(A) OB Name:S279F ================================================================================ *** Instrument : NACO *** Target : S279F *** Classification : X)Uncertain/Not Applicable *** Comments on this OB : ZP Ks and S13 22.92 OK Strehl 28%; J and S27 24.02 Strehl 8%; Ks and S54 23.94 and 22.93 *** Comments internal use : *** Time Started: 23:34 *** Time Finished: For programs (if calibration): Fulfillment of constraints -------------------------- Requested Fulfilled? Seeing: N/A Airmass: N/A FLI: N/A Moon Distance: N/A Sky Transparency: N/A Files produced and additional information: ========================================== INS.ID NAOS-CONICA ==================================================================== OBS.ID 323404001 OBS.START 2002-08-16T23:34:54 OBS.END 2002-08-16T23:47:23 -------------------------------------------------------------------- template: NACO_img_acq_Preset Acq. Image: NACO_acq_0001.fits Acq. Image: NACO_ref_0001-0002.fits Acq. Image: NACO_acq_0002.fits ==================================================================== OBS.ID 323404001 OBS.START 2002-08-16T23:50:27 OBS.END 2002-08-16T23:57:14 -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.09 DIMM: 0.71 setup: IMAGING, S13, J, HighSensitivity, Double_RdRstRd files: NACO_0041-0045.fits ==================================================================== OBS.ID 323404001 OBS.START 2002-08-16T23:59:37 OBS.END 2002-08-17T00:06:34 -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.09 DIMM: 0.85 setup: IMAGING, S13, H, HighSensitivity, Double_RdRstRd files: NACO_0046-0050.fits ==================================================================== OBS.ID 323404001 OBS.START 2002-08-17T00:08:41 OBS.END 2002-08-17T00:15:24 -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.08 DIMM: 0.89 setup: IMAGING, S13, Ks, HighSensitivity, Double_RdRstRd files: NACO_0051-0055.fits ==================================================================== OBS.ID 323404001 OBS.START 2002-08-17T00:17:02 OBS.END 2002-08-17T00:21:17 -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.08 DIMM: 0.82 setup: IMAGING, S27, J, HighSensitivity, Double_RdRstRd files: NACO_0056-0060.fits ==================================================================== OBS.ID 323404001 OBS.START 2002-08-17T00:22:43 OBS.END 2002-08-17T00:27:16 -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.07 DIMM: 0.66 setup: IMAGING, S27, H, HighSensitivity, Double_RdRstRd files: NACO_0061-0065.fits ==================================================================== OBS.ID 323404001 OBS.START 2002-08-17T00:33:45 OBS.END 2002-08-17T00:47:04 -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.07 DIMM: 0.74 setup: IMAGING, S27, Ks, HighSensitivity, Double_RdRstRd files: NACO_0066-0070.fits -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.07 DIMM: 0.82 setup: IMAGING, S54, J, HighSensitivity, Double_RdRstRd files: NACO_0071-0075.fits -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.07 DIMM: 1.02 setup: IMAGING, S54, H, HighSensitivity, Double_RdRstRd files: NACO_0076-0080.fits ==================================================================== OBS.ID 323404001 OBS.START 2002-08-17T00:48:11 OBS.END 2002-08-17T00:52:16 -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.07 DIMM: 0.95 setup: IMAGING, S54, Ks, HighSensitivity, Double_RdRstRd files: NACO_0081-0085.fits -------------------------------------------------------------------- ================================================================================ OB ID: 126237301 Program ID: 60.A-9026(A) OB Name:S808-C ================================================================================ *** Instrument : NACO *** Target : S808-C *** Classification : X)Uncertain/Not Applicable *** Comments on this OB : The correction was very poor in some cases.. S13 Ks ZP=22.77, Strehl=10%. OK *** Comments internal use : *** Time Started: 01:02 *** Time Finished: 02:07 For programs (if calibration): Fulfillment of constraints -------------------------- Requested Fulfilled? Seeing: N/A Airmass: N/A FLI: N/A Moon Distance: N/A Sky Transparency: N/A Files produced and additional information: ========================================== INS.ID NAOS-CONICA ==================================================================== OBS.ID 126237301 -------------------------------------------------------------------- template: NACO_img_acq_Preset airmass: 1.09 DIMM: 0.84 setup: IMAGING, S27, Ks, HighSensitivity, Double_RdRstRd files: NACO_acq_0003.fits -------------------------------------------------------------------- Error: modal optimisation task not active: Rebooted the RTC template: NACO_img_cal_StandardStar airmass: 1.08 DIMM: 1.35 setup: IMAGING, S13, J, HighSensitivity, Double_RdRstRd files: NACO_0086-0090.fits -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.08 DIMM: 1.29 setup: IMAGING, S13, H, HighSensitivity, Double_RdRstRd files: NACO_0091-0095.fits -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.07 DIMM: 1.05 setup: IMAGING, S13, Ks, HighSensitivity, Double_RdRstRd files: NACO_0096-0100.fits -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.07 DIMM: 1.10 setup: IMAGING, S27, J, HighSensitivity, Double_RdRstRd files: NACO_0101-0105.fits -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.07 DIMM: 1.01 setup: IMAGING, S27, H, HighSensitivity, Double_RdRstRd files: NACO_0106-0110.fits -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.07 DIMM: 1.02 setup: IMAGING, S27, Ks, HighSensitivity, Double_RdRstRd files: NACO_0111-0115.fits -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.07 DIMM: 1.16 setup: IMAGING, S54, J, HighSensitivity, Double_RdRstRd files: NACO_0116-0120.fits -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.06 DIMM: 1.17 setup: IMAGING, S54, H, HighSensitivity, Double_RdRstRd files: NACO_0121-0125.fits -------------------------------------------------------------------- template: NACO_img_cal_StandardStar airmass: 1.06 DIMM: 0.85 setup: IMAGING, S54, Ks, HighSensitivity, Double_RdRstRd files: NACO_0126-0130.fits -------------------------------------------------------------------- ================================================================================ OB ID: 126238001 Program ID: 60.A-9026(A) OB Name:buldgeK_a-modified ================================================================================ *** Instrument : NACO *** Target : buldge *** Classification : C)Out of specs - Repeat *** Comments on this OB : Set the rotator angle to 45 degrees. Changed NDIT to 1 and NOFF to 40. *** Comments internal use : *** Time Started: 02:11 *** Time Finished: 02:53 For programs (if calibration): Fulfillment of constraints -------------------------- Requested Fulfilled? Seeing: No Airmass: Yes FLI: Yes Moon Distance: No Sky Transparency: Yes Files produced and additional information: ========================================== INS.ID NAOS-CONICA ==================================================================== OBS.ID 126238001 -------------------------------------------------------------------- template: NACO_img_acq_Preset airmass: 1.04 DIMM: 0.97 setup: IMAGING, S27, Ks, HighSensitivity, Double_RdRstRd files: NACO_acq_0006.fits -------------------------------------------------------------------- Strong Waffle Mode. Re-acquired with the same mode. -------------------------------------------------------------------- template: NACO_img_acq_Preset airmass: 1.06 DIMM: 1.60 setup: IMAGING, S27, NB_2.17, HighSensitivity, Double_RdRstRd files: NACO_ref_0005-0006.fits -------------------------------------------------------------------- template: NACO_img_acq_Preset airmass: 1.06 DIMM: 1.35 setup: IMAGING, S27, Ks, HighSensitivity, Double_RdRstRd files: NACO_acq_0007.fits Br_gamma Strehl=30%. Cf to 46% -------------------------------------------------------------------- template: NACO_img_obs_AutoJitter airmass: 1.06 moon: FLI: 0.6 dist: 19.4 deg alt: 52.8 deg DIMM: 1.08 setup: IMAGING, S27, Ks, HighSensitivity, Double_RdRstRd files: NACO_0131-0139.fits -------------------------------------------------------------------- Autoguider failed to reacquire the guide star. Template crashed Restarted the OB ================================================================================ OB ID: 126237201 Program ID: 69.A-9026(A) OB Name:buldge_a-modified ================================================================================ *** Instrument : NACO *** Target : buldge *** Classification : B)Mostly within specifications *** Comments on this OB : *** Comments internal use : *** Time Started: 02:56 *** Time Finished: 04:21 For programs (if calibration): Fulfillment of constraints -------------------------- Requested Fulfilled? Seeing: No Airmass: Yes FLI: Yes Moon Distance: No Sky Transparency: Yes Files produced and additional information: ========================================== template: NACO_img_acq_Preset airmass: 1.10 moon: FLI: 0.6 dist: 19.3 deg alt: 48.0 deg DIMM: 1.25 setup: IMAGING, S27, Ks, HighSensitivity, Double_RdRstRd files: NACO_acq_0008.fits -------------------------------------------------------------------- template: NACO_img_acq_Preset airmass: 1.11 moon: FLI: 0.6 dist: 19.3 deg alt: 47.2 deg DIMM: 1.11 setup: IMAGING, S27, NB_2.17, HighSensitivity, Double_RdRstRd files: NACO_ref_0007-0008.fits Measured Br_gamma Strehl 26% -------------------------------------------------------------------- template: NACO_img_acq_Preset airmass: 1.11 moon: FLI: 0.6 dist: 19.2 deg alt: 46.4 deg DIMM: 1.10 setup: IMAGING, S27, Ks, HighSensitivity, Double_RdRstRd files: NACO_acq_0009.fits -------------------------------------------------------------------- template: NACO_img_obs_AutoJitter airmass: 1.12 moon: FLI: 0.6 dist: 19.2 deg alt: 46.1 deg DIMM: 1.17 setup: IMAGING, S27, Ks, HighSensitivity, Double_RdRstRd files: NACO_0140-0179.fits ================================================================================ OB ID: 126244601 Program ID: 60.A-9026(A) OB Name:Deep_Cas_Field_Ks_a ================================================================================ *** Instrument : NACO *** Target : Deep *** Classification : B)Mostly within specifications *** Comments on this OB : *** Comments internal use : *** Time Started: 04:52 *** Time Finished: 06:20 For programs (if calibration): Fulfillment of constraints -------------------------- Requested Fulfilled? Seeing: Yes Airmass: Yes FLI: Yes Moon Distance: Yes Sky Transparency: Yes Files produced and additional information: ========================================== NACO_ref_0009 to 0010 Measured, Strehl=24% NACO_ref_0010 Acquisition NACO_0180 to 0239 Some background variation. Pupil alignment (Lyot stop) should be checked ================================================================================ OB ID: 126245001 Program ID: 60.A-9026(A) OB Name:Deep_Cas_Field_J_a ================================================================================ *** Instrument : NACO *** Target : Deep *** Classification : B)Mostly within specifications *** Comments on this OB : A reflection. 3 electronic ghosts and a remnant *** Comments internal use : *** Time Started: 06:20 *** Time Finished: 07:48 For programs (if calibration): Fulfillment of constraints -------------------------- Requested Fulfilled? Seeing: Yes Airmass: Yes FLI: Yes Moon Distance: Yes Sky Transparency: Yes Files produced and additional information: ========================================== template: NACO_img_acq_MoveToPixel Filter: NB_2.17 Strehl images: NACO_ref_0011-0012.fits - Strehl 45%. Acquisition images: NACO_acq_0011.fits template: NACO_img_obs_AutoJitter airmass: 1.03 moon: FLI: 0.61 dist: 82.6 deg alt: 3.1 deg DIMM: 0.63 setup: IMAGING, S54, J, HighSensitivity, FowlerNsamp files: NACO_0240-0248.fits -------------------------------------------------------------------- template: NACO_img_obs_AutoJitter airmass: 1.04 DIMM: 0.77 setup: IMAGING, S54, J, HighSensitivity, FowlerNsamp files: NACO_0249-0276.fits ================================================================================ OB ID: 126244501 Program ID: 60.A-9026(A) OB Name:Deep_Cas_Field_Ks_b ================================================================================ *** Instrument : NACO *** Target : Deep *** Classification : C)Out of specs - Repeat *** Comments on this OB : Vignetting of the visual WFS. *** Comments internal use : *** Time Started: 07:50 *** Time Finished: 07:58 For programs (if calibration): Fulfillment of constraints -------------------------- Requested Fulfilled? Seeing: N/A Airmass: N/A FLI: N/A Moon Distance: N/A Sky Transparency: N/A Files produced and additional information: ========================================== INS.ID NAOS-CONICA ==================================================================== OBS.ID 126244501 -------------------------------------------------------------------- template: NACO_img_acq_MoveToPixel Filter: NB_2.17 Strehl Images: NACO_ref_0013-0014.fits -------------------------------------------------------------------- template: NACO_img_acq_MoveToPixel Acquistion Image: NACO_acq_0012.fits -------------------------------------------------------------------- SUMMARY OF DATA --------------- Daytime Calibrations ==================== OB ID Program ID Instrument OB name Classification ------------------------------------------------------------------------------- 200115617 60.A-9203(E) FORS2 Calibration Valid Nighttime Observations ====================== OB ID Program ID Instrument OB name Classification ------------------------------------------------------------------------------- 126237501 60.A-9026(A) NACO Twilight flats X)Uncertain/Not App 323404001 60.A-9026(A) NACO S279F X)Uncertain/Not App 126237301 60.A-9026(A) NACO S808-C X)Uncertain/Not App 126238001 60.A-9026(A) NACO buldgeK_a-modified C 126237201 69.A-9026(A) NACO buldge_a-modified B 126244601 60.A-9026(A) NACO Deep_Cas_Field_Ks_a B 126245001 60.A-9026(A) NACO Deep_Cas_Field_J_a B 126244501 60.A-9026(A) NACO Deep_Cas_Field_Ks_b C