What to do NOT FRB ToO FRB phenomenon

Photometry Spectroscopy Polarimetry Trigger email Tools

ALFOSC MOSCA NOTCam StanCam

Photometry: NOTCam

1. If the trigger request specifies using StanCam in parallel with NOTCam, please check StanCam and NOTCam together

   
   

2. For the trigger person
   
   For a FRB afterglow you can use the 3x3 dither pattern with 15 arcsec steps.
   
   The typical integration time for a single exposure is one minute. In the Ks-band the high skybackground in sommer months requires shorter individual integrations, down to 30 seconds. The command line for a dither observation with the 3x3 pattern is
   
   notcam.9point frame T N FRBxxxxxx stepsize skew Ncycles
   
   The recommended read-out mode is "frame". You can find here some information on the different read-out modes. The "frame" command stand for the ramp sampling readout mode. This means that the array is read out N times during an exposure. The total exposure time of an integrations is N x T, i.e. N x T is equivalent to NDIT x DIT. The total integration time is given by the number of positions in the used dither pattern and the number of dither cycles (Ncycles). stepsize gives the size of a dither step in arcseconds, while skew gives the size of the small offsets to the pattern to avoid an object falling on the dead column three times per cycle.
   
   For the observer
   
   To set up NOTCam with the requested filter in the beam, run
   
   notcam.setup-ima wf filter-ID
   
   where filter-ID is 236, 201, 203, and 207 for the Y-, J-, H-, and Ks-band, repectively. The script also takes care of the required focus offset.
   
   Run either script attached to the trigger email or located in
   
   ~obs/scripts/52-024
   
   or run the commands as given in the trigger email. This has to be repeated for each filter.

   
   
3. Send an email to the FRB team and add in the End-Of-Night report, which images were made, and approximately how much time you spent in total.
   
   

4. If you have any problems or questions contact your support on duty. You are also welcome to contact the FRB team or the PI (Daniele Malesani) of the program either with e-mail or phone a member of the team using the contact information in the trigger email.