Return to Home Page
Date: Tue, 6 Apr 93 12:27:34 PDT
From: alex%bkyim.hepnet@Lbl.Gov (ALEX FILIPPENKO, UC BERKELEY, 510-642-1813)
Subject: more news about SN 1993J
4-6-93
Dear worshippers of SN 1993J:
Here is are detailed listings of mangitudes, from Mark Kidger and Tashi
Kato. Also attached are messages from Steve Holt (X-ray detection reported
by the ASCA team) and Kurt Weiler (possible radio detection).
Cheers,
Alex Filippenko
*****
From Mark Kidger (La Palma, mrk@iac.dnet.nasa.gov)
The light curve:
Using the extra data published since my last look at the light curve,
most from Taichi Kato's superb compilation, various things about the light
curve are now a lot clearer. After the "correction" of the CCD data applied
by Kato, almost all the CCD data is in very close agreement, with the amateur
visual data running parallel, but a little more than 0.5 mags brighter. That
though is virtually irrelevant, as it is the form of the light curve that is
important. Please note that this is in no way intended to be a detailed light
curve analysis, it just aims to point out where people may like to look in the
final data. Disclaimers aside, various points arise:
1.) I stick by my date of March 25.5-26 for the start of the explosion. HOWEVER,
this ignores the non-detection by Jean-Claude Merlin on March 27.91 as I
suspect that it has an appreciable colour correction to bring it to V or pV.
He must though, have missed seeing the supernova by a whisker. If there is
no colour correction to Merlin's point, the initial rise was much faster and
the date of explosion was later (probably around March 27.5). I know that
de Vaucouleurs favours this later date. I wonder if the sn is actually on the
exposure, but right at the limit.....
2.) The prominent knee in the light curve at V=11.8 (approx., CCD scale) is
confirmed. This started at around March 29.2(ish) and lasted about 0.5 days
or perhaps a little more.
3.) A sharp rise which was not shown in any of the data seen to date, of about
0.5-0.7 magnitudes. This appears to have been very fast indeed, maybe in
just 2-3 hours or less and appears to have occurred on March 30.0-30.1 as
near as I can guess.
4.) The steady, monotonic decline that we all know about, which started as soon
as maximum was reached.
5.) There is a suggestion in the corrected CCD data of a small, brief peak in
the light curve, superimposed on the decline, at about April 1.0 and with
and amplitude of perhaps 0.15 magnitudes. A large number of points around
that time show this trend which, even though small, may well represent a
small sub-maximum.
The data:
People who have plotting routines may find my straight listing of the
data more convenient than Kato's detailed archive. The data sets are the same,
apart from having edited out some irrelevantly bright or early upper limits
and a few photographic data points. My aim was and is to make it possible for
anyone to plot the data with a minimum of file editing (a lot of routines
don't like non-numerical characters which are essential in an archive to know
who took the data and what it means). With my file it is a bit easier to locate
simultaneous photometry in several bands, but the cost is that you don't know
who took it without using Kato's table for cross-reference.
Professional photometry:
March+ U B V R I J H K L
16.90 -9.99 -9.99 20.7 20.0 -9.99 -9.99 -9.99 -9.99 -9.99
23.10 -9.99 -9.99 20.7 20.0 -9.99 -9.99 -9.99 -9.99 -9.99
28.3 -9.99 -9.99 13.80 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
29.18 -9.99 -9.99 11.70 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
30.25 -9.99 -9.99 10.2 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
30.9 9.98 10.83 10.78 -9.99 10.60 -9.99 -9.99 -9.99 -9.99
31.00 -9.99 11.05 -9.99 10.75 -9.99 -9.99 -9.99 -9.99 -9.99
31.1 10.21 10.95 10.85 10.74 10.62 -9.99 -9.99 -9.99 -9.99
31.17 -9.99 -9.99 10.79 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
31.2 -9.99 -9.99 -9.99 -9.99 -9.99 10.90 -9.99 10.60 -9.99
31.2 11.6 11.5 11.2 11.3 11.4 -9.99 -9.99 -9.99 -9.99
31.21 -9.99 -9.99 10.81 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
31.21 -9.99 -9.99 10.4 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
31.26 -9.99 -9.99 10.82 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
31.9 10.63 11.28 11.06 10.85 10.66 -9.99 -9.99 -9.99 -9.99
31.961 -9.99 11.30 10.97 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
31.972 -9.99 11.31 10.94 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
32.00 -9.99 11.40 -9.99 10.95 -9.99 -9.99 -9.99 -9.99 -9.99
32.02 -9.99 11.30 10.90 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
32.18 -9.99 -9.99 11.08 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
32.18 -9.99 -9.99 11.00 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
32.21 -9.99 -9.99 11.13 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
32.40 -9.99 -9.99 10.65 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
32.65 -9.99 -9.99 11.5 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
32.66 -9.99 -9.99 11.21 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
32.816 -9.99 11.51 11.19 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
32.86 -9.99 11.58 11.32 10.95 10.95 -9.99 -9.99 -9.99 -9.99
32.9 11.03 11.60 11.31 11.06 10.85 -9.99 -9.99 -9.99 -9.99
33.1 11.24 11.73 11.41 11.15 10.91 -9.99 -9.99 -9.99 -9.99
33.13 -9.99 -9.99 11.37 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
33.15 -9.99 -9.99 11.45 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
33.15 -9.99 -9.99 11.5 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
33.22 -9.99 -9.99 11.39 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
33.37 -9.99 -9.99 11.45 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
33.494 -9.99 -9.99 11.50 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
33.624 -9.99 11.78 -9.99 -9.99 11.08 -9.99 -9.99 -9.99 -9.99
34.299 -9.99 -9.99 11.75 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
34.342 -9.99 -9.99 11.78 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
34.369 -9.99 -9.99 11.76 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
34.385 -9.99 -9.99 11.77 -9.99 -9.99 -9.99 -9.99 -9.99 -9.99
34.561 -9.99 12.09 11.76 -9.99 11.15 -9.99 -9.99 -9.99 -9.99
Amateur visual and CCD (assumed to be V or close to V)
28.86 11.8
28.89 11.6
29.01 11.3
29.019 11.2
29.1 11.8
29.17 11.2
29.82 11.0
29.82 11.0
29.82 11.2
29.88 11.0
29.88 11.3
29.88 11.3
29.95 11.1
29.95 11.1
30.006 11.0
30.1 11.0
30.538 10.4
30.845 10.3
30.82 10.0
30.84 10.3
30.85 10.0
30.86 10.0
30.865 10.6
30.90 11.0
30.906 10.5
30.91 10.0
30.916 10.6
30.93 10.5
30.94 10.5
30.989 10.6
31.087 10.0
31.1 10.0
31.13 10.5
31.13 10.5
31.13 10.6
31.424 10.5
31.440 10.5
31.576 10.5
31.84 10.5
31.88 10.5
31.89 10.6
31.89 10.7
31.93 10.5
32.055 10.4
32.08 10.7
32.13 10.4
32.453 10.5
32.465 10.5
32.480 10.6
32.538 10.4
32.58 10.8
32.604 11.0
32.622 10.4
32.632 11.2
32.633 10.5
32.726 11.0
32.750 11.0
32.785 10.8
32.795 10.5
32.803 10.7
32.81 10.5
32.84 10.4
32.87 10.5
32.87 10.5
32.88 10.6
33.042 10.6
33.17 10.8
33.439 11.0
33.453 10.9
33.585 11.1
33.608 11.5
33.716 10.6
33.843 11.3
33.867 11.3
33.95 11.5
34.011 11.2
34.15 11.4
34.17 11.2
34.448 11.3
34.574 11.5
34.66 11.8
34.68 11.9
34.831 11.0
34.837 11.2
34.862 11.4
35.029 11.6
35.083 10.8
36.120 11.9
36.15 11.6
36.431 11.8
36.437 12.2
36.444 12.0
36.517 12.0
36.517 12.0
36.566 12.1
36.684 12.0
Useful upper limits:
25.60 -9.99 -9.99 17.0 17.0 -9.99
26.9 -9.99 -9.99 14.0 -9.99 -9.99
26.92 -9.99 -9.99 14.5 -9.99 -9.99
27.91 -9.99 16.0 16.0 -9.99 -9.99
An appeal for help:
Has anyone got decent magnitudes in UBVRI for the nearby star listed as
14.0 in the Thompson-Bryan, or 14.6 in GSC? We are trying to calibrate the
field with our 80cm+CCD, but it will be a few days yet before we have magnitudes
and, in the meantime, I have people who want some kind of magnitudes to get a
provisional reduction done on CCD data.
Mark Kidger
****
From Tashi Kato (Kyoto, tkato@kusastro.kyoto-u.ac.jp):
SN1993J photometric history
Updated list of observations obtained by Apr. 6.
This table is based on that sent from B. H. Granslo (Norway)
(bgranslo@astro.uio.no)
For photoelectric photometry with mentioned comparisons, I have tried
to reduce them using suggested photometric standards rather than GSC
magnitudes. Such data are denoted as "corrected mag".
Visual observations from Japan have also been reduced using V sequences
in "Supernova Search Chart" (designated as SEQ="TB").
I have not tried to reduce "unfiltered CCD magnitudes" to V magnitudes,
but left them as they are with designation "C". Prediscovery observation
on Mar. 28.30 UT is corrected according to G. de Vaucoulers using recent
photometric data on its comparison. Other CCD and visual magnitudes
without referred comparisons are left as they were.
Numerous data are included from Mark Kidger's table, table from Gerard
de Vaucouleurs (gav@astro.as.utexas.edu)="Mail(gav)".
The compilation is only very preliminary and may contain errors.
Consult the original data sources for quantitative analysis.
Observations marked with * are communicated through this nova network.
color band: U,B,V Johnson system
R,I Kron-Cousins system unless notified
g,r Gunn g,r
mv visual (close to V)
p photographic (miscellaneous materials)
C unfiltered CCD
comparisons: TB Thompson-Bryan's "Supernova Search Chart" = V
+ recent photometry, assuming V=11.90 for star B.
TA "The Astronomer" sequence (system ?)
GP GSC photometric field = V
AC AAVSO chart = V?
--------------------------------------------------------------------------------
YYYY MM DD.DDD MAGN MS SEQ OBSERVER NOTES SOURCE
--------------------------------------------------------------------------------
1985 01 21. 21 r Cohen, J. G. 1.5-m + CCD IAUC 5742
1985 01 21 21.9 g Cohen, J. G. 1.5-m + CCD IAUC 5742
1992 10 02. 20.0 R Salzer, J. et al. IAUC 5741
1993 02 24.687 <16.0 mv TB Kushida, R. Mail
1993 03 16.542 <15.0 mv TB Kushida, R. Mail
1993 03 16.90 20.0 R Prugniel, P. CCD serveral images IAUC 5742
1993 03 23.10 20.0 R Prugniel, P. CCD between two dates IAUC 5742
1993 03 21.667 <16.0 p TB Okamoto, Y. Mail
1993 03 25.60 <17 R van Driel, W. Kiso CCD IAUC 5737
1993 03 26.9 <14.0 mv Pujol, P.; IAUC 5731
Ripero, J.
1993 03 26.92 <14.5 mv ? (Kidger's table) ?
1993 03 27.91 <16.0 p Merlin, J.-C. Ektachrome 400 IAUC 5740
1993 03 28.30 13.4 C Neely, A. CCD IAUC 5740
corrected by G. de Vaucoulers
original mag = 13.8
1993 03 28.86 11.8 mv Garcia, F. 25-cm f/3.9 refl. IAUC 5731
DISCOVERY OBSERVATION
1993 03 28.89 11.6 C Rodriguez, D. 20-cm f/5 refl.+ AAVSO 169
ST-4 CCD
1993 03 29.01 11.3 mv Garcia, F. AAVSO 169
1993 03 29.019 11.2 C Ulfheden, P.; 15-cm refl.+ ST-6 CCD Mail
Hamberg, I.
1993 03 29.1 11.8 C Rodriguez CCD IAUC 5731
1993 03 29.17 11.2 mv McGrath, T. (from A. Cowley, ASU) Mail(gav)
1993 03 29.18 11.7 C Neely, A. W. CCD, corrected mag. IAUC 5742
1993 03 29.691 10.3 p TB Hashimoto, Y. Fuji SG-400 Mail
1993 03 29.82 11.0 mv Ripero, J. AAVSO 169
1993 03 29.82 11.2 ? ? (Kidger's table) ?
1993 03 29.88 11.0 C Rodriguez, D. IAUC 5731
1993 03 29.88 11.3 mv Pujol, F. IAUC 5731
1993 03 29.88 11.3 mv Garcia, F. Mail(gav)
1993 03 29.95 11.1 mv Garcia, F. IAUC 5733
1993 03 30.006 11.0: C TB Solberg, R. 40.6-cm f/4.5 refl.+ Mail
ST-6 CCD
1993 03 30.1 11 mv Treffers, R. R. 0.8-m + CCD IAUC 5731
1993 03 30.25 10.2 V Hartwick,F.et al. 50-cm refl.+ CCD IAUC 5731
1993 03 30.538 10.4 mv TB Yamada, M. Mail
1993 03 30.82 10.0 ? ? (Kidger's table) ?
1993 03 30.845 10.3: mv TA Schmeer, P. 20.3-cm SCT IAUC 5733
1993 03 30.85 10.0 ? ? (Kidger's table) ?
1993 03 30.86 10.0 ? ? (Kidger's table) ?
1993 03 30.865 10.6 mv Poyner, G. 40-cm refl. Mail
1993 03 30.9 10.78 V *Unger, S. B-V=0.05 Nova
1993 03 30.9 10.83 B *Unger, S. B-V=0.05 Nova
1993 03 30.9 9.98 U *Unger, S. Nova
1993 03 30.9 10.60 I *Unger, S. Nova
1993 03 30.90 11.0 mv GP Midtskogen, O. 31.6-cm f/4.9 refl. Fax
1993 03 30.906 10.5 mv TB Schmeer, P. 20.3-cm SCT Mail
1993 03 30.91 10.0 ? ? (Kidger's table) ?
1993 03 30.916 10.6 mv Poyner, G. 40-cm refl. Mail
1993 03 30.93 10.5 mv TA Bengtsson, H. 15-cm refl. Mail
1993 03 30.94 10.5 mv Shanklin, J. D. IAUC 5736
1993 03 30.989 10.6 mv Poyner, G. 40-cm refl. Mail
1993 03 31.00 11.05 B Prugniel, P. 0.8-m + CCD, B-R=+0.3 IAUC 5736
1993 03 31.00 10.75 R Prugniel, P. (0.8-m, CCD) B-R=+0.3 IAUC 5736
1993 03 31.087 10.0 mv S Moore, D. 20-cm SCT, class 2 News
1993 03 31.1 10 mv Kohl, R. Independent discovery IAUC 5736
1993 03 31.1 10.21 U *Unger, S. Nova
1993 03 31.1 10.85 V *Unger, S. B-V=0.10 Nova
1993 03 31.1 10.95 B *Unger, S. B-V=0.10 Nova
1993 03 31.1 10.74 R *Unger, S. Nova
1993 03 31.1 10.62 I *Unger, S. Nova
1993 03 31.13 10.6 mv GP Midtskogen, O. 31.6-cm refl. Fax
1993 03 31.13 10.5 mv Cainciolo, F. IAUC 5736
1993 03 31.13 10.5 mv TB Wren McDonald Obs. Mail(gav)
1993 03 31.17 10.79 V Balonek, T. J. Corrected, CCD IAUC 5746
et al.
1993 03 31.2 10.7 R Salzer, J. et al. IAUC 5741
1993 03 31.2 10.9 J Barker, E. et al McDonald Obs. Mail(gav)
1993 03 31.2 10.60 K Barker, E. et al McDonald Obs. Mail(gav)
1993 03 31.21 10.81 V Neely, A. W. Corrected mag. IAUC 5742
1993 03 31.21 10.4 C Neely,A.W. CCD, corrected mag. IAUC 5742
1993 03 31.26 10.82 V Balonek, T. J. Corrected, CCD IAUC 5746
et al.
1993 03 31.424 10.5 mv TB Yamada, M. Mail
1993 03 31.440 10.5 mv TB Yamada, M. Mail
1993 03 31.576 10.5 mv TB Kato, T. 20cm-SCT Mail
1993 03 31.596 10.5 mv TB Takahashi, S. 60cm refl. Mail
1993 03 31.84 10.5 mv Zanotta, M. V.; IAUC 5737
Pesci, S .
1993 03 31.88 10.5 ? ? (Kidger's table) ?
1993 03 31.89 10.6 ? ? (Kidger's table) ?
1993 03 31.9 10.63 U *Unger, S. Nova
1993 03 31.9 11.06 V *Unger, S. B-V=0.22 Nova
1993 03 31.9 11.28 B *Unger, S. B-V=0.22 Nova
1993 03 31.9 10.85 R *Unger, S. Nova
1993 03 31.9 10.66 I *Unger, S. Nova
1993 03 31.93 10.5 ? ? (Kidger's table) ?
1993 03 31.961 10.97 V Hanzl, D. B-V=+0.33 IAUC 5742
1993 03 31.961 11.30 B Hanzl, D. B-V=+0.33 IAUC 5742
1993 03 31.972 10.94 V Sostero, G. et al. B-V=+0.37 IAUC 5741
1993 03 31.972 11.31 B Sostero, G. et al. B-V=+0.37 IAUC 5741
1993 04 01.00 11.40 B Prugniel, P. (CCD) B-R=+0.45 IAUC 5741
1993 04 01.00 10.95 R Prugniel, P. (CCD) B-R=+0.45 IAUC 5741
1993 04 01.020 10.90 V Sostero, G. et al. B-V=+0.40 IAUC sub
1993 04 01.020 11.30 B Sostero, G. et al. B-V=+0.40 IAUC sub
1993 04 01.055 10.4 mv Beauchamp, D. 20.3-cm SCT. Class 2 Mail
1993 04 01.08 10.7 mv Schmeer, P. IAUC 5740
1993 04 01.13 10.4 mv TB Cianciolo, F. UTexas, Austin Mail(gav)
1993 04 01.18 11.08 V Neely, A. W. Corrected mag. IAUC 5742
1993 04 01.18 11.0 C Neely, A. W. CCD, corrected mag. IAUC 5742
1993 04 01.21 11.07 V Balonek, T. J. Corrected, CCD IAUC 5746
et al.
1993 04 01.40 11.13 V Balonek, T. J. Corrected, CCD IAUC 5746
et al.
1993 04 01.453 10.5 mv TB Takahashi, S. 20cm refr. Mail
1993 04 01.465 10.5 mv TB Iida, M. Mail
1993 04 01.480 10.6 mv Momose ?
1993 04 01.538 10.4 mv TB Kato, T. 20cm SCT Mail
1993 04 01.58 10.8 p TB Kushida 40-cm +Fuji SuperG400 Mail
1993 04 01.604 11.0 mv TB Kiyota, S. 20cm refl. Mail
1993 04 01.622 10.4 mv TB Watanabe, Y. 12cm refl. Mail
1993 04 01.632 11.2 mv TB Shioi, H. 20cm refl. Mail
1993 04 01.633 10.5 p TB Kushida, Y. 40cm f/5, Mail
Tri-X no filter
1993 04 01.65 11.5 C Neely Corrected Mail(gav)
1993 04 01.660 11.22 V Okyudo, M. 60cm refl.+ CCD Mail
(revised) Nishi-Harima Obs.
1993 04 01.726 10.9 mv TB Watanabe, T. 10cm refl. Mail
(revised)
1993 04 01.750 11.0 mv TB Koyama, H. 15cm refl. Mail
1993 04 01.785 10.8 p TB Koyama, H. 15cm f/6, GX 3200 Mail
1993 04 01.795 10.5 mv TB Hirosawa, K. 21cm refl. Mail
1993 04 01.803 10.7 mv AC Schmeer, P. 20.3-cm SCT Mail
1993 04 01.81 10.5 mv Vanmunster, T. IAUC 5740
1993 04 01.816 11.19 V Hanzl, D. B-V=0.32 IAUC 5742
1993 04 01.84 10.4 ? ? (Kidger's table) ?
1993 04 01.86 11.32 V Mikolajewski, M. B-V=0.26, V-R=0.37 IAUC 5742
V-I=0.37
1993 04 01.86 11.58 B Mikolajewski, M. B-V=0.26, V-R=0.37 IAUC 5742
1993 04 01.86 10.95 R Mikolajewski, M. B-V=0.26, V-R=0.37 IAUC 5742
1993 04 01.86 10.95 I Mikolajewski, M. B-V=0.26, V-R=0.37 IAUC 5742
1993 04 01.87 10.5 ? ? (Kidger's table) ?
1993 04 01.87 10.5 ? ? (Kidger's table) ?
1993 04 01.87 10.6 ? ? (Kidger's table) ?
1993 04 01.9 11.03 U *Unger, S. Nova
1993 04 01.9 11.31 V *Unger, S. B-V=0.29 Nova
1993 04 01.9 11.60 B *Unger, S. B-V=0.29 Nova
1993 04 01.9 11.06 R *Unger, S. Nova
1993 04 01.9 10.85 I *Unger, S. Nova
1993 04 02.042 10.6 mv TB Kratz, D. 20-cm f/3.5 refl. News
1993 04 02.1 11.24 U *Unger, S. Nova
1993 04 02.1 11.41 V *Unger, S. B-V=0.32 Nova
1993 04 02.1 11.73 B *Unger, S. B-V=0.32 Nova
1993 04 02.1 11.15 R *Unger, S. Nova
1993 04 02.1 10.91 I *Unger, S. Nova
1993 04 02.13 11.37 V Balonek, T. J. Corrected, CCD IAUC 5746
et al.
1993 04 02.15 11.45 V Neely, A. W. Corrected mag. IAUC 5742
1993 04 02.15 11.5 C Neely, A. W. CCD, corrected mag. IAUC 5742
1993 04 02.17 10.8 mv TB Cianciolo, F., UTexas, Austin Mail(gav)
1993 04 02.22 11.39 V Balonek, T. J. Corrected, CCD IAUC 5746
et al.
1993 04 02.37 11.45 V Balonek, T. J. Corrected, CCD IAUC 5746
et al.
1993 04 02.439 11.0 mv TB Yamada, M. 16cm refl. Mail
1993 04 02.453 10.9 mv TB Takahashi, S. 60cm refl. Mail
1993 04 02.494 11.50 V Kato, T. (CCD) 60cm, CCD Mail
1993 04 02.611 11.78 B Kato, T. (CCD) 60cm, CCD Mail
1993 04 02.637 11.08 I Kato, T. (CCD) 60cm, CCD Mail
1993 04 02.585 11.1 mv TB Watanabe, M. 13cm refl. Mail
1993 04 02.608 11.5 mv TB Sakuma, S. 40cm refl. Mail
1993 04 02.716 10.6 mv TB Abe, S. 31cm refl. Mail
1993 04 02.843 11.3 mv Poyner, G. 40-cm refl. Mail
1993 04 02.867 11.3 mv TB Granslo, B. H. 20.3-cm SCT, 123x,
class 2 (hazy sky)
1993 04 02.95 11.5 mv TA Bengtsson, H. 15-cm refl. Mail
1993 04 03.011 11.2 mv TB Granslo, B. H. 20.3-cm SCT, 123x,
class 2 (hazy sky)
1993 04 03.15 11.4 mv TB Buta, R. U. Oklahoma Mail(gav)
1993 04 03.17 11.2 mv TB Wren McDolanld Obs. Mail(gav)
1993 04 03.299 11.75 V GS Robosope 40.6-cm refl.+512x512 Mail
(Univ. Indiana) Tektronix CCD
1993 04 03.342 11.78 V GS Robosope Mail
1993 04 03.369 11.76 V GS Robosope Mail
1993 04 03.385 11.77 V GS Robosope Mail
1993 04 03.448 11.3 mv TB Takahashi, S. 60cm refl. Mail
1993 04 03.555 11.76 V Kato, Taichi 60cm, CCD Mail
1993 04 03.561 12.09 B Kato, Taichi 60cm, CCD Mail
1993 04 03.574 11.15 I Kato, Taichi 60cm, CCD Mail
1993 04 03.574 11.5 mv TB Takahashi, S. 60cm refl. Mail
1993 04 03.66 11.8 mv TB Kushida, R. Mail
1993 04 03.68 11.9 mv TB Kushida, Y.
1993 04 03.831 11.0 mv TB Dahle, H. 20.3-cm SCT, 200x,
AAVSO mags, class 1
1993 04 03.837 11.2 mv TB Dahle, H. 20.3-cm SCT, 200x;
Sandage mags.,class 2
1993 04 03.862 11.4 mv TA Westlund, M. 20.3-cm SCT Mail
1993 04 04.029 11.6 mv TB Schmeer, P. 20.3-cm SCT Mail
1993 04 04.083 10.8: mv TB Kratz, D. 20-cm f/3.5 refl. News
1993 04 05.120 11.9 mv TB Schmeer, P. 20.3-cm SCT Mail
1993 04 05.15 11.6 mv TB Levy, S. 20.3-cm SCT, 133x News
(Univ. Minnesota)
1993 04 05.431 11.8 mv TB Takahashi, S. 60cm refl. Mail
1993 04 05.437 12.2 mv TB Kiyota, S. 30cm Mail
1993 04 05.444 12.0 mv TB Yamada, M. 16cm refl. Mail
1993 04 05.489 11.88 V Kato, Taichi 60cm, CCD Mail
1993 04 05.549 12.25 B Kato, Taichi 60cm, CCD Mail
1993 04 05.513 11.24 I Kato, Taichi 60cm, CCD Mail
1993 04 05.517 12.0 mv TB Kushida, Y. 45cm refl. Mail
1993 04 05.517 12.0 mv TB Kushida, R. 45cm refl. Mail
1993 04 05.524 12.2 mv TB Watanabe, T. 10cm refl. Mail
1993 04 05.566 12.1 mv TB Watanabe, Y. 20cm SCT Mail
1993 04 05.573 11.9 mv TB Koyama, H. 15cm refl. Mail
1993 04 05.589 11.8 C TB Kushida, Y. 40cm, ST-4 CCD Mail
1993 04 05.614 11.89 V Kato, Taichi 60cm, CCD Mail
1993 04 05.669 12.25 B Kato, Taichi 60cm, CCD Mail
1993 04 05.713 11.08 I Kato, Taichi 60cm, CCD Mail
1993 04 05.619 11.9 p TB Koyama, H. 15cm refl., GX 3200 Mail
1993 04 05.624 12.2 mv TB Abe, S. 16cm refl. Mail
1993 04 05.642 12.1 mv TB Shio, H. 20cm recl. Mail
1993 04 05.660 11.98 V Okyudo, M and 60cm refl. + CCD Mail
Ishida, T. Nishi-Harima Obs.
1993 04 05.684 12.0 mv TB Watanabe, S. 16cm refl. Mail
1993 04 06.428 11.8 mv TB Takahashi, S. 60cm refl. Mail
1993 04 06.442 11.9 mv TB Yamada, M. Mail
1993 04 06.553 11.8 C TB Kushida, Y. 40cm refl, ST-4 CCD Mail
-----------------------------------------------------------------------------
********
From Steve Holt (LHEAVX::HOLT) (who reports, verbatim, news he received
from the ASCA team):
We are now very confident about the positive detection of X-ray
emission from SN 1993J from quick-look analysis of the playback data
accumulated during the remote passes of April 5 which were telemetered
in this morning. We can clearly resolve the emission of SN1993J from
that of the nearby point source X6 in the image of SIS, although the
separation of the two sources is only 1 arcmin. The intensity of
SN1993J is far larger than that of X6 source and the GIS spectrum of
the SN1993J region is flatter than that of M81 nucleus at energies
above 2 keV.
We are going to send IAU Circular tomorrow and will observe SN1993J
again at the remote passes of April 7.
****
From Kurt Weiler (NRL, kweiler@shimmer.nrl.navy.mil):
Here is the latest information on radio results. This should appear as a
circular shortly.
Kurt
SN 1993J in NGC 3031
K. W. Weiler, Naval Research Laboratory; R. A. Sramek, National Radio Astronomy
Observatory; S. D. Van Dyk, Naval Research Laboratory; and N. Panagia, Space
Telescope Science Institute, report that new observations of SN 1993J made on
1993 April 2.30 UT with the Very Large Array in B configuration show a possible
detection at 1.3-cm wavelength (22.5 GHz) of a 0.8 +/- 0.2 mJy source at
position R.A. = 09h51m19s.032, Decl. = +69 15' 26".47 (equinox 1950.0) near
the reported optical position of the supernova (IAUC 5731 and IAUC 5737). It
should be emphasized that this possible detection is barely significant and
must be confirmed. Observations at 2.0-cm wavelength (14.9 GHz) show no
detection to a limit (3 sigma) of < 0.33 mJy. New observations at 3.6-cm
wavelength (8.4 GHz), combined with previous observations at the same
wavelength as reported in IAUC 5743, still show no detection to a very low limit
(3 sigma) of < 0.080 mJy. Radio monitoring is continuing at these and other
wavelengths. New measurements of the compact radio source in the nucleus of
NGC 3031 provide an improved position of R.A. = 09h51m27s.321,
Decl. = +69 18' 08".20 (equinox 1950.0; +/- 0".2 in each coordinate).
The measured peak flux densities of the nucleus are: 59 mJy at 3.6-cm
wavelength and 12 mJy at 20 cm-wavelength.
Return to the Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
