LIGO/Virgo/KAGRA S240422ed: X-ray Upper Limits from EP-FXT for the Potential Electromagnetic Counterparts Reported by Swift and DECam
Abstract
AT 2024hdn |127.302473|-21.50639| 2024-04-24T07:24:02 | 515 | 1.3 x 10^-13 | 2.1 x 10^-13 AT 2024hdm |126.65801 |-20.83375| 2024-04-24T07:15:58 | 434 | 1.1 x 10^-13 | 1.6 x 10^-13 AT 2024hdl |125.47270 |-30.10220| 2024-04-24T07:43:56 | 509 | 1.3 x 10^-13 | 7.2 x 10^-14 AT 2024hdo |120.866797|-26.01212| 2024-04-24T08:48:53 | 507 | 8.6 x 10^-14 | 1.1 x 10^-13 AT 2024hdr* |120.804560|-24.33268| 2024-04-24T07:34:01 | 510 | 3.5 x 10^-12 AT 2024hdp |120.543455|-27.25787| 2024-04-24T08:40:25 | 447 | 1.4 x 10^-13 | 1.6 x 10^-13 AT 2024hdq* |115.811388|-25.76403| 2024-04-24T08:58:34 | 512 | 6.4 x 10^-12 S240422ed_X61 |120.3245 |-28.1765 | 2024-04-24T10:41:07 | 4472 | 1.4 x 10^-14 | 1.7 x x10^-14 S240422ed_X101 |122.3954 |-24.3272 | 2024-04-24T13:29:32 | 2946 | 1.8 x 10^-14 | 2.2 x 10^-14 S240422ed_X190 |121.2770 |-26.1203 | 2024-04-24T09:22:15 | 574 | 7.6 x 10^-14 | 6.4 x 10^-14 -------------------------------------------------------------------------------------------------------------- Note: For AT 2024hdr and AT 2024hdq, which are reported to be unrelated to S240422ed (GCN 36285), the averaged flux of FXTA and FXTB is given. The above observations were made with the FXT instrument during the commissioning phase of EP. Launched on January 9, 2024, EP is a space X-ray observatory to monitor the soft X-ray sky with X-ray follow-up capability (Yuan et al. 2022, Handbook of X-ray and Gamma-ray Astrophysics). EP is a mission of the Chinese Academy of Sciences in collaboration with ESA, MPE and CNES. References: [1] Ruiz, A., et al. "The RapidXMM upper limit server: X-ray aperture photometry of the XMM-Newton archival observations." Monthly Notices of the Royal Astronomical Society 511.3 (2022): 4265-4284. [2] Zhang, Juan, et al. "Estimate of the background and sensitivity of the follow-up X-ray telescope onboard Einstein Probe." Astroparticle Physics 137 (2022): 102668.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- April 2024
- Bibcode:
- 2024GCN.36301....1L