RA/DEC (2000)
19:13:03.502 +19:46:24.26
288.264589851 +19.7734052399
Type
SN Ic-BL
Redshift
0.151
Reporting Group
Pan-STARRS
Discovering Data Source
Pan-STARRS
Discovery Date
2022-10-11 05:33:02.592
TNS AT
Y
Public
Y
Discovery Mag
18.25
Filter
i-P1
Reporter/s
K. C. Chambers, T. de Boer, J. Bulger, J. Fairlamb, M. Huber, C.-C. Lin, T. Lowe, E. Magnier, A. Schultz, R. J. Wainscoat, H. Gao (IfA, University of Hawaii), K. W. Smith, D. R. Young, J. Gillanders, S. Srivastav, M. Fulton, S. J. Smartt, S. Sim (Queen's University Belfast), D. E. Wright (University of Minnesota)

Spectra

 SN_2022xiw - 2022-10-17 09:06:19 GTC / OSIRIS (None)z=
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 PS2_GPC2_i_
   
Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
13718 2022-10-17 09:06:19 GTC / OSIRIS 9600 A. de Ugarte Postigo, L. Izzo, C. C. Thoene, J. P. U. Fynbo, D. A. Kann, J. F. Agui Fernandez, N. R. Tanvir A. de Ugarte Postigo, L. Izzo, C. C. Thoene, J. P. U. Fynbo None tns_2022xiw_2459869.87938657_GTC_OSIRIS.txt Object 2023-01-19 The spectrum at this time is dominated by the afterglow, which is also affected by a large line-of-sight extinction. To extract the SN spectrum we subtracted a model of the afterglow continuum.
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
i-P1 PS2_GPC2 2022-10-11 05:33:03 - 2022-10-12 06:20:15 2459863.73128 - 2459864.76406 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
312361 2022-10-12 06:20:15 2459864.76406 19.05 0.02 20.7 ABMag i-P1 PS2_GPC2 100 Robot
310649 2022-10-11 05:33:03 2459863.73128 18.25 0.02 20.7 ABMag i-P1 PS2_GPC2 100 Robot
AT Reports
ID Time received (UT) Sender Reporter/s Reporting group Disc. Data Source RA DEC Discovery date (UT) Discovery Mag. Filter Related files AT Type Host name Internal name Assoc. Groups End prop. period Remarks Bibcode Unreal Auto classification
162250 2022-10-20 08:42:16 YSE_Bot1 D. O. Jones (UC Santa Cruz),K. D. French (Carnegie,Illinois) et al. YSE Pan-STARRS 19:13:03.502 +19:46:24.26 2022-10-12 06:20:14.784 19.05 i-P1 PSN PS22kcq Pan-STARRS, YSE N
161324 2022-10-12 10:16:45 PS1_Bot1 K. C. Chambers,T. de Boer,J. Bulger et al. Pan-STARRS Pan-STARRS 19:13:03.504 +19:46:24.26 2022-10-11 05:33:02.592 18.25 i-P1 PSN PS22kcq Pan-STARRS 2022TNSTR2961....1C N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
13645 2022-10-19 13:50:39 Antonio de Ugarte Postigo Antonio de Ugarte Postigo (OCA), Luca Izzo (DARK/NBI), Christina C. Thoene (ASU-CAS), Johan P. U. Fynbo (DAWN/NBI), D. Alexander Kann (Goethe Univ.), Jose Feliciano Agui Fernandez (IAA-CSIC), Nial R. Tanvir (Leicester Univ.) None SN Ic-BL 0.151 1 HETH We have been spectroscopically monitoring the evolution of the extremely bright GRB 221009A (Swift detection: Dichiara et al., GCN 32632; Fermi GBM detection: Veres et al., GCN 32636) using OSIRIS at the 10.4m GTC telescope. In a spectrum combining data taken on 16 and 17 October (at an average time of ~8 days after the burst), covering the spectral range between 3700 and 10000 AA, the emission is still clearly dominated by the afterglow. However, after subtracting a model of the continuum, the spectrum shows undulations characteristic of a GRB-SN. In particular we identify broad features at similar wavelengths (after correcting for the redshift difference) as those present in SN 1998bw, with somewhat larger velocities. This is indicative of the emergence of the associated supernova. Further follow-up observations are planned. 2022TNSCR3047....1P
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
13718 2022-10-17 09:06:19 GTC / OSIRIS 9600 A. de Ugarte Postigo, L. Izzo, C. C. Thoene, J. P. U. Fynbo, D. A. Kann, J. F. Agui Fernandez, N. R. Tanvir A. de Ugarte Postigo, L. Izzo, C. C. Thoene, J. P. U. Fynbo None tns_2022xiw_2459869.87938657_GTC_OSIRIS.txt Object 2023-01-19 The spectrum at this time is dominated by the afterglow, which is also affected by a large line-of-sight extinction. To extract the SN spectrum we subtracted a model of the afterglow continuum.

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 162250 of Group Pan-STARRS
Previous RA, DEC: 19:13:03.504, +19:46:24.26 (288.264599176, +19.7734044268)
Updated RA, DEC: 19:13:03.502, +19:46:24.26 (288.264589851, 19.7734052399)

Stephen
Smartt

Minor correction to previous comment

We observed the GRB221009A with Pan-STARRS and our processing (e.g. Smartt et al. AstroNote 2019-48 ) automatically registers any new sources found in Pan-STARRS difference imaging on the TNS if they do not yet exist. Hence this "Discovery Report" was triggered on the TNS and we do not consider this an independent discovery.

Stephen
Smartt

Confirming attribution of discovery to Swift and GCN 32632

We observed the GRB221009A with Pan-STARRS and our processing (e.g. Smartt et al. TNS ) automatically registers any new sources found in Pan-STARRS difference imaging on the TNS if they do not yet exist. Hence this "Discovery Report" was triggered on the TNS. Hence we do not consider this a TNS discovery report. 

The discovery of the optical counterpart to GRB221009A should be correctly attributed to the Swift UVOT detection of Dichiara et al. (GCN 32632), who reported a new bright hard X-ray and optical transient as Swift J1913.1+1946 (GRB at 59861.59047454 and UVOT beginning 179sec later).  The X-ray detection was confirmed as GRB221009A in Veres et al. (GCN 32636). 

 

Ken
Smith

This is GRB221009A

This is the GRB afterglow GRB221009A