2022MNRAS.515.6007A

Query : 2022MNRAS.515.6007A

2022MNRAS.515.6007A - Mon. Not. R. Astron. Soc., 515, 6007-6022 (2022/October-1)

GRANDMA observations of ZTF/Fink transients during summer 2021.

AIVAZYAN V., ALMUALLA M., ANTIER S., BARANSKY A., BARYNOVA K., BASA S., BAYARD F., BERADZE S., BEREZIN D., BLAZEK M., BOUTIGNY D., BOUST D., BROENS E., BURKHONOV O., CAILLEAU A., CHRISTENSEN N., CEJUDO D., COLEIRO A., COUGHLIN M.W., DATASHVILI D., DIETRICH T., DOLON F., DUCOIN J.-G., DUVERNE P.-A., MARCHAL-DUVAL G., GALDIES C., GRANIER L., GODUNOVA V., GOKULDASS P., EGGENSTEIN H.B., FREEBERG M., HELLO P., INASARIDZE R., ISHIDA E.E.O., JAQUIERY P., KANN D.A., KAPANADZE G., KARPOV S., KIENDREBEOGO R.W., KLOTZ A., KNEIP R., KOCHIASHVILI N., KOU W., KUGEL F., LACHAUD C., LEONINI S., LEROY A., LEROY N., LE VAN SU A., MARCHAIS D., MASEK M., MIDAVAINE T., MOLLER A., MORRIS D., NATSVLISHVILI R., NAVARETE F., NOYSENA K., NISSANKE S., NOONAN K., ORANGE N.B., PELOTON J., POPOWICZ A., PRADIER T., PROUZA M., RAAIJMAKERS G., RAJABOV Y., RICHMOND M., ROMANYUK Y., ROUSSELOT L., SADIBEKOVA T., SERRAU M., SOKOLIUK O., SONG X., SIMON A., STACHIE C., TAYLOR A., TILLAYEV Y., TURPIN D., VARDOSANIDZE M., VLIEGHE J., TOSTA E MELO I., WANG X.F. and ZHU J.

Abstract (from CDS):

We present our follow-up observations with GRANDMA of transient sources revealed by the Zwicky Transient Facility (ZTF). Over a period of six months, all ZTF alerts were examined in real time by a dedicated science module implemented in the Fink broker, which will be used in filtering of transients discovered by the Vera C. Rubin Observatory. In this article, we present three selection methods to identify kilonova candidates. Out of more than 35 million alerts, a hundred sources have passed our selection criteria. Six were then followed-up by GRANDMA (by both professional and amateur astronomers). The majority were finally classified either as asteroids or as supernovae events. We mobilized 37 telescopes, bringing together a large sample of images, taken under various conditions and quality. To complement the orphan kilonova candidates, we included three additional supernovae alerts to conduct further observations during summer 2021. We demonstrate the importance of the amateur astronomer community that contributed images for scientific analyses of new sources discovered in a magnitude range r' = 17 - 19 mag. We based our rapid kilonova classification on the decay rate of the optical source that should exceed 0.3 mag d–1. GRANDMA's follow-up determined the fading rate within 1.5 ± 1.2 d post-discovery, without waiting for further observations from ZTF. No confirmed kilonovae were discovered during our observing campaign. This work will be continued in the coming months in the view of preparing for kilonova searches in the next gravitational-wave observing run O4.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): gravitational waves - methods: data analysis - neutron star mergers

Simbad objects: 17

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Number of rows : 17
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 105 G 00 25 16.7518787184 +12 53 01.913865576   14.1       ~ 73 0
2 MCG-04-03-013 EmG 00 47 37.939 -20 31 10.25   14.69   13.82   ~ 21 2
3 SN 2021vtq ev 00 47 38.940 -20 31 24.46           ~ 3 0
4 LEDA 1115282 GiC 01 11 25.86 -01 35 01.3           ~ 5 0
5 SN 2021yyg SN* 05 16 21.030 -13 28 39.97           SNIIP 1 0
6 Z 287-14 AG? 07 57 18.8992429392 +58 31 15.002112000   15.5       ~ 14 0
7 SN 2021wqd SN* 07 57 18.950 +58 31 25.03           SNII 1 0
8 ZTF21abdwdwo ev 11 20 26.715 +25 33 10.44           ~ 1 0
9 LEDA 1740743 G 11 20 27.28245 +25 33 10.3122           ~ 8 0
10 NGC 4799 LIN 12 55 15.5289264528 +02 53 48.020731728   14.32       ~ 92 1
11 SN 2021pkz SN* 12 55 17.220 +02 53 50.32           SNIa 2 0
12 GrW 170817 GWE 13 09 48.0850 -23 22 53.343           ~ 2683 0
13 SN 2021pfs SN* 14 03 23.580 -06 01 53.90           SNIa 6 0
14 SN 2021mwb SN* 16 08 57.1107125 +35 25 15.903536           SNIa 2 0
15 SN 2021ugl SN* 16 27 55.689 +20 15 11.38           SNIIb 3 0
16 ZTF21ablssud ev 19 16 37.231 +24 24 34.04           ~ 2 0
17 Z 381-56 LSB 23 51 50.6809891488 +03 04 57.754612308   15.0       ~ 73 0

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