GRB030329 observations from Nyrölä Observatory

The bright optical afterglow of GRB030329 was imaged March 31, 2003 23 UT through Rc filter.

Copyright: Nyrölä Observatory, 2003

The first night photometric observations


A. Oksanen on behalf of Nyrola observatory GRB
Team reports:

The bright afterglow was observed with the 0.4 SCT
telescope of Nyrölä observatory using short (60/120 s)
exposures and Rc-filter. Sky was almost cloudy, but time to
time the afterglow was visible and measurable. 

Photometry (AIP4Win) from the best frames (Henden photometry
file reference) follows: 

see photometry_20030329.txt

Full resolution images:

GCN 2010 - Visual observations

NUMBER:  2010
SUBJECT: GRB 030329: visual observations
DATE:    03/03/30 00:33:03 GMT
FROM:    Arto Oksanen at Nyrola Obs., Finland  

A. Oksanen (Nyrola Observatory), R. Henriksson and M. Tuukkanen (the Finnish 
Deep Sky section of Astronomical Association Ursa) report:

We observed the optical afterglow of GRB030329 reported by Peterson and Price (GCN
1985) visually about 8 hours after the burst. 

M. Tuukkanen observed the OT In Pornainen, Finland with a 0.63 m Newton telescope for
about one hour starting March 29, 2003 19:30 UT. 
He reported it as a faint starlike object seen easily with direct vision. He did not
see any flickering or distinct color.

R. Henriksson was observing in Orivesi, Finland with his 0.30 m Newton telescope using
200x magnification at 20:05 UT. He reported the object 
stellar and faint, visible only with averted vision. His scanned sketch 
with notes is available on web:

Both observers estimated the visual magnitude as 14.3 by using the 14.2 magnitude GSC
1434:322 star North of OT as reference.

This message may be cited.

GCN 2058 - The first AAVSO observation summary

NUMBER:  2058
SUBJECT: AAVSO V & R observations of GRB030329
DATE:    03/04/01 02:44:00 GMT
FROM:    AAVSO GRB Network at AAVSO  

A. Price (AAVSO) reports on behalf of the AAVSO International GRB Network:

The AAVSO International GRB Network has obtained B, V, R, and unfiltered
photometry of the afterglow to GRB030329 from numerous sources across the
globe over the past 3 days. See notes for details and access to time
series data.

Berto Monard, South Africa
  Unfiltered = 14.06 @ 2003.03.29 17:15 to
  Unfiltered = 15.01 @ 2003.03.29 23:37
  exposures: 317X45-60s 

Arto Oksanen, 0.4m at Nyrola Observatory, Finland
  R = 14.50 @ 2003.03.29 20:22:23 to
  R = 14.75 @ 2003.03.29 22:28:03
  exposures: 10X120s (out of 148 total)

Tim Schrabback and Anja von der Linden, 1.06m at Observatory
Hoher List of Bonn University, Germany
  R = 15.0 @ 2003.03.29 22:55
  exposure: 1800s

Peter Brown, 0.41m at Orson Pratt Observatory, Brigham Young
University, Utah USA
  R = 15.2 @ 2003.03.30 02:38 to
  R = 16.2 @ 2003.03.30 10:41
  exposures: 1X300s 

Dan Kaiser, 0.35m at Crescent Moon Observatory, Indiana USA
  V = 16.62 2003.03.31 01:32:04 to
  V = 16.97 2003.03.31 06:18:06
  R = 16.26 2003.03.31 02:10:12 to
  R = 16.53 2003.03.31 06:22:37

Bill Aquino, 0.3m with Buffalo Astronomical Association in 
New York, USA
  V = 16.71 @ 2003.03.31 05:33:03
  exposures: 4X180s exposure 

 * Detailed reports (observing equipment, location, conditions, etc.)  
and many original FITS files available at or by e-mailing
 * Brown, Kaiser, Monard, and Oksanen have time series data spanning the
observations posted here. Full data has already been or will be posted
soon to the URL above.
 * Aquino, Kaiser, and Oksanen used comparison star photometry from Henden
et al. (GCN 2023). Brown used comp star A described on the finder chart by
Rumyantsev et al. (GCN 2005). Schrabback et al. used comp star A described
on a different finder chart by Martini et al.(GCN 2012). Monard's comp
star is from USNOA2, 14.0R, 3' NNE of GRB.
  * The decay rate in Monard's exposure varies from 0.191 CR/h in the
beginning of the run to 0.103 CR/h at the end. Kaiser's time series data
is fairly constant until about 5:40 when the OT begins to fade again.

  The CCD used by Oksanen plus other components of the AAVSO International
GRB network were funded by a generous grant from the Curry Foundation.

Photometry on March 31/April 1, 2003


A. Oksanen on behalf of Nyrola observatory GRB
Team reports:

Photometry run in V and Rc was performed with the 0.40 m SCT telescope under 
good conditions from March 31 19:00 UT to April 1, 2003 01:30 UT. 

The light curves are pretty flat as expected, but there is one intresting 
feature near noise level. The OT started to fade faster around 23 UT and 
then started to rise again. This 0.1 magnitude dip is visible both in Rc 
and V. BUT the dip seem to be 30 minutes later in R! 

Attendum April 4, 2003: This dip was not confirmed statistically from the data. 
More datailed analysis is in progress.


Full resolution images:

One week later

The optical afterglow is still observable! Petri Tikkanen imaged the transient in Rc-band on April 5, 2003 20:21-22:47 UT with the 0.4m Meade LX200 SCT and SBIG ST8XE CCD. The combined 34 x 240 s (8160 s) exposure shows the afterglow faded to R=18.59 +/- 0.04 at midpoint epoch April 5.90 UT (178 hrs after the burst).

Full resolution image

GCN 2104 - The third AAVSO report

NUMBER:  2104
SUBJECT: GRB030329: More AAVSO VR obs
DATE:    03/04/06 19:40:40 GMT
FROM:    AAVSO GRB Network at AAVSO  

A. Price, B. Monard, A. Oksanen, T. DiLapo, D. West, D. Kaiser, D.
Starkey, P. Nelson, P. Pääkkönen and J. Mattei (AAVSO); T. Durig, A. L.  
Seifert, C. B. Norton, G.F. Garland, J.K.Cole, J.B. Cherry (University of
the South); A. Henden (USRA/USNO)  report on behalf of the AAVSO
International GRB Network:

This is a 3rd set of observations of the OT found by Peterson and Price
(GCN 1985) dating from March 29th to April 6th.  Included in the
observations is a URL where a full report (equipment, seeing, etc.) is
available. Many times the original FITS image is also available. When time
series data is available we only put the first and last observation.

A light curve of all AAVSO data to date has been made by B. Gary and
posted at

Bruce L. Gary, .25m at Arizona, USA.
Rc = 15.67 +/- 0.04 @ 2003.03.30 07:08 to
Rc = 16.82 +/- 0.04 @ 2003.03.30 04:26
 V = 15.89 +/- 0.06 @ 2003.03.30 07:16 to
 V = 16.13 +/- 0.04 @ 2003.04.01 08:38
Rc = 18.07 +/- 0.05 @ 2003.04.05 03:49
Rc = 18.78 +/- 0.12 @ 2003.04.06 03:50
     exposures:64X15s,70X30s(for last obs)

Arto Oksanen and Petri Tikkanen, .4m at Nyrola Observatory, Finland.
Rc = 16.714 merr: 0.051 @ 2003.03.31 19:09 to
Rc = 16.842 merr: 0.060 @ 2003.04.01 00:59
 V = 17.157 merr: 0.053 @ 2003.03.31 19:48 to
 V = 17.297 merr: 0.077 @ 2003.04.01 00:55
Rc = 18.59  merr: 0.04  @ 2003.04.05 21:35 
   exposures: 78x240s, 34x240s (last obs)

Tristan DiLapo, .31m at Orbit Jet Observatory, New York, USA.
Rc = 16.32 err: 0.06 @ 2003.03.31 02:56 to
Rc = 16.34 err: 0.06 @ 2003.03.31 04:02
  exposures: 10X120s

Doug West, .2m at West Skies Observatory, Kansas, USA.
Unfiltered = 17.2 +/- 0.14 2003.04.02 02:08  7*30s exposures
Unfiltered = 17.5 +/- 0.13 2003.04.04 02:09  14*35s exposures
Unfiltered = 18.3 +/- 0.20 2003.04.05 02:11  19X35s exposures
   exposures: 7X30s

Dan Kaiser, .35m at Crescent Moon Observatory, Indiana, USA.
Rc = 17.44 @ 2003.04.02 02:13
   exposures: 14X240s

D. T. Durig, A. L. Seifert, C. B. Norton, G.F. Garland, J.K.Cole,
J.B. Cherry, .3m at Cordell-Lorenz Observatory, Tennessee, USA
Rc = 17.96 @ 2003.04.02 02:36
Rc = 18.06 @ 2003.04.02 03:38
Rc = 18.36 +/- 0.2 @ 2003.04.03 03:45
Rc = 18.46 +/- 0.2 @ 2003.04.03 03:59
     exposures: 4X600s

Donn Starkey, .36m at DeKalb Observatory, Indiana, USA.
Rc = 16.06 @ 2003.04.02 04:30
Bu = 18.02 @ 2003.04.02 05:44
 V = 16.85 @ 2003.04.02 04:52

Peter Nelson, .32m at Ellinbank Observatory, Australia.
Rc = 18.3 +/- 0.3 @ 2003.04.03 13:00
     exposures: 3X300s

Pertti Pääkkönen, .5m at Jakokoski Observatory, Finland.
Rg = 18.55 +/- 0.04 @ 2003.04.05 22:12
     exposures: 33X300sääkkönen_GRB030329_2452736.16987_.txt

Correction: The data below is a recalculation (based on a better comp
 star) of data posted earlier in GCN 2058.
Berto Monard, .3m at Bronberg Observatory. South Africa
Unfiltered: 13.8 @ 2003.03.29 17:15 to
Unfiltered: 14.7 @ 2003.03.29 23:37

 * Durig et al., Gary, Starkey, Oksanen, West, Nelson, Pääkkönen and
Kaiser used Henden et al. photometry (GCN 2023) for comparison. DiLapo
used USNOA2. Monard used Tycho-2.

 * Pääkkönen's R filter (Rg) is a custom designed filter. Info at:

 The AAVSO International GRB network is greatful for a generous grant from
the Curry Foundation and to NASA for the financial support for the High
Energy Workshops for Amateur Astronomers.

April 9/10, 2003

The afterglow was imaged with Rc filter on April 9/10, 2003 20:37-00:12 UT 
(11 days after the burst!). Total of 50 240s exposures were stacked using 
Sigma Reject average. 
The afterglow magnitude was measured with MaxIm/DL to R=19.17 +/- 0.07 on 
the mid epoch of April 9.93 UT using all eight reference stars from the 
AAVSO f-scale chart based on Henden photometry file.

Full resolution images

The fourth (final) AAVSO GCN

NUMBER:  2156
SUBJECT: GRB030329: 444 AAVSO Measurements
DATE:    03/04/20 03:21:34 GMT
FROM:    AAVSO GRB Network at AAVSO  

A. Price (AAVSO); B. Aquino (AWJ); E. Broens (BOS) & J. Hambsch
(HJB) (VVS Werkgroep Veranderlijke Sterren); P. Brown (OPO01 -
Brigham Young University); T. DiLapo (DLN); B. Dillon (DIL) &
J. Dellinger, D. Beaver, P. Garossino, T. Garossino; N.
Dunckel (DNI); T. Durig &  A. L. Seifert, C. B. Norton, G.F. Garland,
J.K. Cole, J.B. Cherry (CLW01 - University of the South); B. Gary
(GBL); B. Granslo (GRL); A. Henden (USRA/USNO); D. Hohman (HDF);
D. Kaiser (KDA); Z. Kereszty (KZX); P. Kilmartin & A. Gilmore (KPM
- University of Canterbury) J. Liesmann (LJI); G. Lubcke (LBG); J.
Mattei (AAVSO); B. Monard (MLF); P. Nelson (NLX); A. Oksanen (OAR)
& P. Tikkanen (TPE); P. Pääkkönen (PPK); D. Starkey (SDB);
A. von der Linden & T. Schrabback (XXX - IAEF, Bonn University);
D. West (WJD) report on behalf of the AAVSO International GRB Network:

   The AAVSO has 444 measurements of of the GRB030329 OT found by
Peterson and Price (GCN 1985) spanning 03:47 on March 31 to
03:09 on April 17, 2003. All observations have been rereduced using
the final photometry from Henden et al. (GCN 2114)

   A light curve, all data plus a finder chart with the comparison
and check stars used is available at this URL:

  Full reports including equipment and site info are available
 Many of the FITS images
are available there as well.

 The AAVSO International GRB network is grateful for a generous
grant from the Curry Foundation and to NASA for the financial
support for the High Energy Workshops for Amateur Astronomers.

Links about this GRB