DRAFT
2023-05-21 06:27:50
Type: Object/s-Data/Analysis
Bibcode: 2023TNSAN.125....1Z
Pre-Discovery Images of SN 2023ixf taken at T-[9,18,33] hours
Authors: Keming Zhang (UC Berkeley), David Kennedy, Bronco Oostermeyer, Joshua Bloom (UC Berkeley), Daniel A. Perley (LJMU)
Keywords: Supernova
Abstract:
Pre-discovery images taken around 9, 18, 33 hours prior to discovery by Koichi Itagaki show brightness of ~15.3mag, ~17.3mag, and < 21-22 mag (3-sigma). The explosion therefore predates 2023-05-19 01:42 UT.

We report on pre-discovery images taken by amateur astronomers David Kennedy and Bronco Oostermeyer. Data by Kennedy is acquired with a 15.2cm refractor telescope with the ZWO ASI2600MM Pro CCD camera and a clear filter. Data by Oostermeyer is taken with a 10cm refractor telescope with the ZWO ASI533MC Pro CCD camera. Note that this camera has a built-in Bayer filter that allows RGB (~BVR) data to be acquired simultaneously. Each set of data consists of multiple frames with four hours of cumulative exposure. It may be possible to derive light curves for each 4 hour interval.

Time interval (UT) Magnitude Time to discovery Observer
2023-05-18 06:03--10:15 >20-21 mag 31--35 hours Kennedy
2023-05-18 21:24--01:42 (+1) ~17.3 mag 20--16 hours Oostermeyer
2023-05-19 06:08--10:15 ~15.3 mag 7--11 hours Kennedy

 

 

 

 

These pre-discovery images were first posted to the astrophotography forum astrobin. Photometry performed on stacked calibrated images solicited by K. Zhang. Raw and calibration data available upon request.


https://www.astrobin.com/6vbxvk/
https://www.astrobin.com/oddwjt/

Show current TNS values
Catalog Name Reported RA Reported DEC Reported Obj-Type Reported Redshift Host Name Host Redshift Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2023ixf [ZTF23aaklqou] 14:03:38.564 +54:18:42.02 SN II 0.000804 M101 14:03:38.562 +54:18:41.94 SN II 0.0008
AstroNote Publication Timestamp Title Authors
2023-120 2023-05-20 01:17:30 ZTF Pre-Discovery Forced Photometry of SN 2023ixf Daniel A. Perley (LJMU), Ido Irani (Weizmann)
2023-123 2023-05-20 14:49:49 Filippenko Prediscovery Image of SN 2023ixf A V. Filippenko, W. Zheng, and Y. Yang (U.C. Berkeley)
2023-124 2023-05-20 19:27:01 ATLAS forced photometry pre-discovery limit of SN 2023ixf M. D. Fulton, M. Nicholl, K. W. Smith, S. Srivastav, D. R. Young, M. McCollum, T. Moore, S. Sim, J. Weston, X. Sheng (QUB), L. Shingles (GSI/QUB), J. Sommer (LMU/QUB), A. Aamer (UoB/QUB), S. J. Smartt, H. Stevance, L. Rhodes, A. Andersson (Oxford), L. Denneau, J. Tonry, H. Weiland, A. Lawrence, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), J. Anderson (ESO), A. Jordan, V. Suc (UAI, Obstech) A. Rest (STScI), T.-W. Chen (TUM), C. Stubbs (Harvard)

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