A Hubble Space Telescope image of a Luminous Fast Blue Optical Transient (LFBOT) designated AT2023fhn, indicated by pointers. It shines intensely in blue light and evolves rapidly, reaching peak brightness and fading again in a matter of days, unlike supernovae which take weeks or months to dim. Only a handful of previous LFBOTs have been discovered since 2018. The surprise is that this latest transient, seen in 2023, lies at a large offset from both the barred spiral galaxy at right and the dwarf galaxy to the upper left. Only Hubble could pinpoint its location. And, the results are leaving astronomers even more confounded because all previous LFBOTs have been found in star-forming regions in the spiral arms of galaxies. It's not clear what astronomical event would trigger such a blast far outside of a galaxy.
Credits
Image
NASA, ESA, STScI, Ashley Chrimes (ESA-ESTEC/Radboud University)
| About The Object | |
|---|---|
| Object Name | AT2023fhn |
| Object Description | Luminous Fast Blue Optical Transient (LFBOT) |
| R.A. Position | 10:08:03.82 |
| Dec. Position | +21:04:26.95 |
| Constellation | Leo |
| Dimensions | Image is about 26 arcseconds across |
| About The Data | |
| Data Description | This image was created with Hubble data from proposal: (A. Chrimes) |
| Instrument | WFC3/ACS |
| Exposure Dates | 17 May 2023 |
| Filters | F555W V |
| About The Image | |
| Color Info | This image was acquired by the WFC3 instrument on the Hubble Space Telescope. The color results from assigning a blue hue to a monochromatic (grayscale) image. |
| Compass Image |  |
| About The Object | |
|---|---|
| Object Name | A name or catalog number that astronomers use to identify an astronomical object. |
| Object Description | The type of astronomical object. |
| R.A. Position | Right ascension – analogous to longitude – is one component of an object's position. |
| Dec. Position | Declination – analogous to latitude – is one component of an object's position. |
| Constellation | One of 88 recognized regions of the celestial sphere in which the object appears. |
| Distance | The physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units (AU). Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs. |
| Dimensions | The physical size of the object or the apparent angle it subtends on the sky. |
| About The Data | |
| Data Description |
|
| Instrument | The science instrument used to produce the data. |
| Exposure Dates | The date(s) that the telescope made its observations and the total exposure time. |
| Filters | The camera filters that were used in the science observations. |
| About The Image | |
| Image Credit | The primary individuals and institutions responsible for the content. |
| Publication Date | The date and time the release content became public. |
| Color Info | A brief description of the methods used to convert telescope data into the color image being presented. |
| Orientation | The rotation of the image on the sky with respect to the north pole of the celestial sphere. |
