Science Archive Facility

SN 1999em

The ESO and ST-ECF Archive is a joint collaboration of the European Southern Observatory (ESO) and the Space Telescope - European Coordinating Facility (ST-ECF).

FORS1 observations of the Type II Supernova SN 1999em

During the technical night of November 2, 1999, SN 1999em was observed with FORS1. The observations

include spectropolarimetry with the standard collimator, the 300V grism and four Wollaston prism angles.

All integrations were 300 seconds through a 1" slit and done with the FORS1_pmos_obs_exp template.

The relevant information from the night log is shown below.

The raw data and the calibrations can be retrieved from the ESO archive.

Extract from observing log

Conditions
----------
gen:         Clear
seeing:      0.4-1.6, median 0.7
wind:        0-8 m/s
humidy:      10-17%
temperature: 12-14 C
loss:        None.

FORS1 calibration plan: Biases
------------------------------
OB: bias-ABCD-1x1
ABCD,1x1,low FORS1_IMG_CAL306.39 - 43.fits
ABCD,1x1,high FORS1_IMG_CAL306.44 - 48.fits

comments: around 200 cts

***********************************
Preparation for the night
***********************************

**********************
FORS1 Calibration Plan
**********************

Skyflats (started 23:08 UT)
--------------------------
I FORS1_IMG_CALSKY306.13 - 16.fits
R FORS1_IMG_CALSKY306.23 - 26.fits

*******************************
Spectrophotometric standards SR
*******************************

OB-Name:   specphot-LTT1020
Object:    LTT1020
Mode:      SR/MOS
CCD:       A,1x1,high
Airmass:   1.11
DIMM:      1.1
Start:     01:54 UT
Comments:

MOS/SR/GRIS300V 30s FORS1_MOS_STD307.6.fits

SN1999em - pre-imaging
**********************

OB-Name:   SN1999em_photo
Object:    SN1999em
Mode:      SR/IMA
CCD:       ABCD,1x1,high
Airmass:   1.50
DIMM:      0.60
Start:     03:36 UT

IMA/SR I_BESS 5s FORS1_STD307.7.fits

***********************************
FORS1 Calibration Plan Photom Std
***********************************

OB-Name:    Photom-std-PG0231+051-high_23jul
Object:     PG0231
Mode:       SR/IMA
CCD:        ABCD,1x1,high
Airmass:    1.18
DIMM:       0.62
Start:      03:44 UT
Comments:

Files:

R 4s FORS1_STD307.11.fits, Star A and C saturated.
I 6s FORS1_STD307.12.fits, Star A,B and C saturated.

R 1s FORS1_STD307.15.fits
I 1.5s FORS1_STD307.16.fits, Star A saturated. IQ=0.56

***********************************
FORS1 Calibration Plan - Photom Std
***********************************

OB-Name:    NGC-1850
Object:     NGC-1850
Mode:       SR/IMA
CCD:        ABCD,1x1,high
Airmass:    1.611
DIMM:       0.59
Start:      04:01 UT
Comments:

R 4s FORS1_STD307.20.fits
I 10s FORS1_STD307.21.fits

***********************
TEST Spectropolarimetry
***********************

OB-Name:   SN_spectra
Object:    sn1999em
Mode:      SR/PMOS
CCD:       A,1x1,high
Airmass:   1.08
DIMM:      0.6-0.8
Start:     06:50 UT

Template: FORS1_pmos_acq

Used slit 10 for alignment. Acquisition=interactive.

Acq. image: FORSFieldAcq307.19 offsets, -0.34,-0.96,-0.01 offset and repeat
Acq. image: FORSFieldAcq307.20 offsets, 0.05,0.00,0.00 offset and no repeat

Template: FORS1_pmos_obs_slit

Image: FORS1_MOS307.5 Alignment is very good. No offset required.

Tempalte: FORS1_mos_obs_exp

Test image to estimate exposure time.

MOS/SR ABCD,1x1,high G300V no filt. 20s FORS1_MOS307.6 Peak counts 2000. OK

Template: FORS1_pmos_obs_exp

PMOS/SR G300V no filter 300s FORS1_PMOS307
PMOS/SR G300V no filter 300s FORS1_PMOS307.1
PMOS/SR G300V no filter 300s FORS1_PMOS307.2
PMOS/SR G300V no filter 300s FORS1_PMOS307.3

**********************
FORS1 Calibration Plan
**********************

Photmetric Standard Ru149

OB-Name:    Photom-std-Rubin149-high_23jul
Object:     Ru149
Mode:       SR/IMA
CCD:        ABCD,1x1,high
Airmass:    1.10
DIMM:       0.88
Start:      08:50 UT
Comments:

Files:

R 1s FORS1_STD307.25.fits, star D saturated.
I 1.5s FORS1_STD307.26.fits, star D saturated.

FORS1 calibration plan: Biases
------------------------------
A,1x1,high                FORS1_IMG_CAL307.5 - 9.fits
ABCD,1x1,low              FORS1_IMG_CAL307.10 - 14.fits
ABCD,1x1,high             FORS1_IMG_CAL307.15 - 19.fits

OB: specphot-bias
A,1x1,high FORS1_IMG_CAL307.25 - 29.fits

Specphot flats SR
-----------------

A,1x1,high GRIS_300V FORS1_MOS_CAL307.20 - 22.fits (lamp unit 1)
no filter FORS1_MOS_CAL307.23 - 25.fits (lamp unit 2)

Specphot wave cal SR
---------------------
A,1x1,high GRIS_300V FORS1_MOS_CAL307.32.fits

PMOS calib
-----------
Flats,   GRIS_300V     FORS1_PMOS_CAL307   - 3.fits (lamp unit 1)
                       FORS1_PMOS_CAL307.4 - 7.fits (lamp unit 2)
Wavecal, GRIS_300V     FORS1_PMOS_CAL307.8.fits

Send comments to <catalog@eso.org>

Last modified: Tue Dec 7 14:58:27 MET 1999