RS Oph

General information

• Name of the source: RS Ophiuchi
• Brief description of the source:

- Object type : Symbiotic star

- Distance (pc) : 4200 +/- 900

- Other relevant information: Nova outburst in August 8 2021 (ATel #14834)

- RA: 17 50 13.16 (hh mm ss), Dec: -06 42 28.48 (dd mm ss)

- RA, Dec in deg (ICRS): 267.55, -6.71

Data-taking information

• Dates of data-taking (yyyymmdd): 20210809, 20210810, 20210812, 20210813, 20210814, 20210815, 20210829, 20210830, 20210901, 20210902.

- Date [yyyymmdd] (time of observation h): 20210809 (1.23)

• ZD range (deg): [36, 42]
• AZ range (deg): [181, 226]
• Transmission9km: 0.91-1.03
• Runs: 5580-5584
• Joint observations with MAGIC? : No (5580-5581), Yes (5582-5584)
• Comments: Dark conditions. Huge spike in the trigger rate and decrease HV (23:17).

- Date [yyyymmdd] (time of observation h): 20210810 (2.55)

• ZD range (deg): [36, 58]
• AZ range (deg): [181, 240]
• Transmission9km: 0.90-1.05
• Runs: 5630-5639
• Joint observations with MAGIC? : No?
• Comments: Moon and moon set conditions. Spikes in camera rate. Car flashes. MAGIC LIDAR in our FoV every 4 min (5634-5636).

- Date [yyyymmdd] (time of observation h): 20210812 (2.10)

• ZD range (deg): [36,54]
• AZ range (deg): [184, 235]
• Transmission9km: 0.89-0.96
• Runs: 5696-5704
• Joint observations with MAGIC? : Yes?
• Comments: Moon and moon set conditions. Spikes in camera rate.

- Date [yyyymmdd] (time of observation h): 20210813 ()

• ZD range (deg): Zenith Range
• AZ range (deg): Azimuth Range
• Transmission9km: None, 0.6, 0.46, 0.17, 0.19, 0.28
• Runs: 5719,5722-5726
• Joint observations with MAGIC? : Yes?
• Comments: Moon and moon set conditions. Spikes in camera rate, decreasing anode current.

- Date [yyyymmdd] (time of observation h): 20210814 ()

• ZD range (deg): Zenith Range
• AZ range (deg): Azimuth Range
• Transmission9km: 0.65-0.68
• Runs: 5742-5748
• Joint observations with MAGIC? : Yes?
• Comments: Moon and moon set conditions. Decreasing anode current with several spikes, high camera rate (run: 5742), stable camera rate (runs: 5743-5746). LIDAR shooting (5746).

- Date [yyyymmdd] (time of observation h): 20210815 ()

• ZD range (deg): Zenith Range
• AZ range (deg): Azimuth Range
• Transmission9km: 0.53-0.56
• Runs: 5763-5766
• Joint observations with MAGIC? : Yes?
• Comments: Moon conditions. Step decreasing anode current, stable (and low?) camera rate.

- Date [yyyymmdd] (time of observation h): 20210829 ()

• ZD range (deg): Zenith Range
• AZ range (deg): Azimuth Range
• Transmission9km: ???
• Runs: 5890-5893
• Joint observations with MAGIC? : Yes?
• Comments: Dark conditions. Stable anode current and camera rate, but spikes (runs: end 5892, 5893). LIDAR shooting (5891).

- Date [yyyymmdd] (time of observation h): 20210830 ()

• ZD range (deg): Zenith Range
• AZ range (deg): Azimuth Range
• Transmission9km: ???
• Runs: 5912-5917
• Joint observations with MAGIC? : Yes?
• Comments: Dark conditions. Spikes and decreasing camera rate (stable in 5914-5915). Some spikes in anode current. LIDAR shooting (5912-5616).

- Date [yyyymmdd] (time of observation h): 20210901 ()

• ZD range (deg): Zenith Range
• AZ range (deg): Azimuth Range
• Transmission9km: ???
• Runs: 5942-5945
• Joint observations with MAGIC? : Yes?
• Comments: Dark conditions. run 5942 with low interleaved pedestals (but inside the boundaries) and high cosmic rate > 10 p.e, half of the pixels are outside the defined boundaries for cosmic rate > 30 p.e.

- Date [yyyymmdd] (time of observation h): 20210902 ()

• ZD range (deg): Zenith Range
• AZ range (deg): Azimuth Range
• Transmission9km: ???
• Runs: 5970-5973
• Joint observations with MAGIC? : No?
• Comments: Dark conditions. Some spikes in runs 5970-5971. Sudden change in the camera rate. All runs with too high camera average rate > 30 p.e. pulses. LIDAR shooting (5970-5973).

RS Oph data analysis

Analysis November 2021

• Analysis A. Aguasca-Cabot lstchain v0.7.X

Analysis February 2022

• Analysis A. Aguasca-Cabot lstchain v0.8.X
• Analysis A. Aguasca-Cabot lstchain v0.9.X