AROMA-W Ichiro Takahashi Takanori Sakamoto for the AROMA team (Aoyama Gakuin University)

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Presentation transcript:

AROMA-W Ichiro Takahashi Takanori Sakamoto for the AROMA team (Aoyama Gakuin University)

AROMA-W: (AGU Robotic Optical Monitor for Astrophysical objects, Wide-field) Wide field optical monitor: Commercially available digital cameras + telescope mount -Canon EOS 5D (Two) mm lens -Canon EOS 350D (Ten) mm lens Mount: Takahashi EM- 400 Temma2 SkyShed POD

Observatory Location W N AGU Machida Field -AGU’s facility (free internet, electricity,..) -Good viewing -Relatively away from a city light 30° 7.5km E N S

Observatory System PC1 Control + Data Transfer PC2 Data Transfer 5D 5D2 Kiss 1 Kiss 2 Kiss 3 Kiss 4 Kiss 5 Kiss 6Kiss 7 Kiss 10 Kiss 9Kiss 8 PC3 Data Transfer PC4 Data Transfer PC5 Data Transfer PC6 Data Transfer Shutter control Router Mount control POD Analysis AGU Sagamihara Campus USB2.0

Wide filed of view observation in single shot!

AROMA-W: Sensitivity Exposure time [sec] V Mag ＋ : 5D × : 350D 3σ limit Data of Spring Combine 30 sec images

RA [h] Dec [deg] Camp et al Follow-up optical observation of GW triggers

Prompt optical observation of GRBs Search for pre-burst optical emission of GRBs ? Optical observation before and during GRBs GRB B: Racusin et al GRB A X-ray Optical

Current Observation Strategy: Chase the Swift pointing - Swift’s pointing information is available through GCN Red : 5D Yellow : 350D Test observation: :58 UT: Swift’s target SN2014J

90° 30° 45° 120° Overlaid image of AROMA-W and Swift/BAT

SN 2014J was visible by AROMA-W! AROMA-W K2 combined image (Jan. 28, 800 s exposure) M82 with SN 2014J (Jan. 21 ) Goobar et al. 2014

Analysis pipeline CF Memory in DSRL Analysis PC Transfer PC Data transfer These processes are automated Analysis Photometry Selection of comparison star Star detection Make Star positional list Tri-color resolution Positional correction Data reduction RAW to FITS conversion Image processing

EOS 5D + EF 200mm 20sec ～ 5000 objects How to search variable stars and OTs Search OTs and variable stars AROMA-W monitor the flux of all the objects in the F.O.V. 5D image Threshold ： 1.5σ 4 pixels over Red ： R band Green ： W band By monitoring these light curves

Summary AROMA-W is a wide-field optical monitor using multiple DSRL Cameras. AROMA-W has very wide FOV, about 45°×30° in single shot. AROMA-W’s 3σ limit V magnitude is 12 to 13 for 100 seconds exposure. Science objectives of AROMA-W: – Follow-up optical observation of GW triggers AROMA-W can cover 3σ conf. level area of GW transients at once. – Optical observation before and during GRBs Currently, AROMA-W is chasing the Swift pointing. – It covers about 1/10 of the BAT FOV. Basically analysis pipeline have already developed.