{
  "body": "Benjamin Schneider (MIT), Christophe Adami (LAM/Pytheas/AMU) report on behalf of a larger collaboration:\n\nWe observed the field of EP241021a (Hu et al., GCN 37834) using the T193cm telescope at Observatoire de Haute-Provence (France) equipped with the MISTRAL spectro-imager. A total of 55 min of exposure (1x300s + 5x600s) were obtained in the r-band starting at 21:11:05 UT on 2024-10-31 (~10.7 days after the trigger). The optical transient and its rebrightening (Fu et al., GCNs 37840, 37842; Li et al., GCNs 37844, 37846; Ror et al., GCN 37845; Zheng et al., GCN 37849; Moskvitin & Spiridonova, GCN 37850; Pugliese et al., GCN 37852; Pérez-Fournon et al., GCN 37858; Bochenek & Perley, GCN 37869; Kumar et al., GCN 37875; Busmann et al., GCN 37877; J-Jin et al., GCN 37892; Freeburn et al., GCNs 37911, 37942, Quirola-Vasquez et al., GCN 37930; Freeburn et al., GCN 37942; Moskvitin et al. GCN 37951; Pan et al., GCN 37968; Klingler et al., GCN 37990; Carotenuto et al. GCN 38014) is clearly detected in our stacked image.\n\nThe preliminary magnitude derived for the source is\n\nr = 22.01 +/- 0.05 mag (AB)\n\nThe photometric calibration was performed using nearby stars from the PanSTARRS catalog and the magnitude is not corrected for Galactic extinction.\n\nWe acknowledge the excellent support from Observatoire de Haute-Provence and in particular Jean Balcaen for the MISTRAL observations.",
  "bibcode": "2024GCN.38022....1S",
  "circularId": 38022,
  "createdOn": 1730419843454,
  "submitter": "Benjamin Schneider at MIT <bschn@mit.edu>",
  "eventId": "EP241021a",
  "submittedHow": "web",
  "format": "text/plain",
  "subject": "EP241021a: OHP/T193 optical observations"
}