RS Oph

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RS Oph during its 2021 eruption. Credit: Daniel Korona

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)
  • ELOG link: [1]
  • 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)
  • ELOG link: [2]
  • 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)
  • ELOG link: [3]
  • 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 ()
  • ELOG link: [4]
  • 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 ()
  • ELOG link: [5]
  • 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 ()
  • ELOG link: [6]
  • 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 (0.97)
  • ELOG link: [7]
  • ZD range (deg): Zenith Range
  • AZ range (deg): Azimuth Range
  • Transmission9km: > 80
  • 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 (1.52)
  • ELOG link: [8]
  • ZD range (deg): Zenith Range
  • AZ range (deg): Azimuth Range
  • Transmission9km: > 80
  • 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 (0.32)
  • ELOG link: [9]
  • ZD range (deg): Zenith Range
  • AZ range (deg): Azimuth Range
  • Transmission9km: > 90
  • 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 (1.28)
  • ELOG link: [10]
  • ZD range (deg): Zenith Range
  • AZ range (deg): Azimuth Range
  • Transmission9km: > 90
  • 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 February 2022

Analysis March 2022

Analysis September 2022

Analyses presented in conferences

Analyses December 2022

RS Oph paper meetings