[vsnet-grb-info 28756] GRB 210919a: Lowell Discovery Telescope upper limits

21 Sep 2021


      TITLE:   GCN CIRCULAR
NUMBER:  30859
SUBJECT: GRB 210919a: Lowell Discovery Telescope upper limits
DATE:    21/09/21 15:25:55 GMT
FROM:    Amy Gottlieb at UMD  <Agottlieb7@gmail.com>

<html xmlns:o=3D"urn:schemas-microsoft-com:office:office" xmlns:w=3D"urn:sc=
hemas-microsoft-com:office:word" xmlns:m=3D"http://schemas.microsoft.com/of=
fice/2004/12/omml" xmlns=3D"http://www.w3.org/TR/REC-html40"><head><meta ht=
tp-equiv=3DContent-Type content=3D"text/html; charset=3Dutf-8"><meta name=
=3DGenerator content=3D"Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
	{font-family:"Cambria Math";
	panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
	{font-family:Calibri;
	panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
	{margin:0in;
	font-size:11.0pt;
	font-family:"Calibri",sans-serif;}
.MsoChpDefault
	{mso-style-type:export-only;}
@page WordSection1
	{size:8.5in 11.0in;
	margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
	{page:WordSection1;}
--></style></head><body lang=3DEN-US style=3D'word-wrap:break-word'><div cl=
ass=3DWordSection1><p class=3DMsoNormal>A.Gottlieb (UMD, NASA-GSFC), S.Dich=
iara (UMD, NASA-GSFC),  S.B. Cenko<o:p></o:p></p><p class=3DMsoNormal>=
(NASA-GSFC), E. Troja (UMD, NASA-GSFC), J.M. Durbak (UMD), A. Kutyrev <o:p>=
</o:p></p><p class=3DMsoNormal>(UMD, NASA-GSFC), S. Veilleux (UMD), report =
on behalf of a larger <o:p></o:p></p><p class=3DMsoNormal>collaboration:<o:=
p></o:p></p><p class=3DMsoNormal> <o:p></o:p></p><p class=3DMsoNormal>=
We observed the field of the short GRB 210919A (Tohuvavohu et al., <o:p></o=
:p></p><p class=3DMsoNormal>GCN Circ. 30846) using the Large Monolithic Ima=
ger (LMI) on the 4.3m <o:p></o:p></p><p class=3DMsoNormal>Lowell Discovery =
Telescope (LDT) at Happy Jack, AZ. Observations <o:p></o:p></p><p class=3DM=
soNormal>started on September 21, 11:27:43 UT (2.46 days after the Swift <o=
:p></o:p></p><p class=3DMsoNormal>trigger) taking 5 exposures of 200 s each=
 with SDSS r filter. <o:p></o:p></p><p class=3DMsoNormal>Observations were =
taken at an airmass of about 1.27 and seeing of <o:p></o:p></p><p class=3DM=
soNormal>about 1.5". We do not find any source inside the enhanced <o:=
p></o:p></p><p class=3DMsoNormal>XRT position (Goad et al., GCN Circ. 30850=
) down to a 3-sigma <o:p></o:p></p><p class=3DMsoNormal>limiting magnitude =
of r>23.6 AB mag.<o:p></o:p></p><p class=3DMsoNormal>Magnitudes are cali=
brated against the SDSS catalog and not <o:p></o:p></p><p class=3DMsoNormal=
...
corrected for Galactic extinction.<o:p></o:p></p><p class=3DMsoNormal>&nbs=
p;<o:p></o:p></p><p class=3DMsoNormal>We thank the staff of the Lowell Disc=
overy Telescope for assistance <o:p></o:p></p><p class=3DMsoNormal>with the=
se observations.<o:p></o:p></p><p class=3DMsoNormal> <o:p></o:p></p><p=
 class=3DMsoNormal><o:p> </o:p></p></div></body></html>

GCN Circulars

tags

participants (1)