Images from Apache Point Observatory and Manastash Ridge Observatory
The APO home page can be reached by clicking here .
Jeff Morgan's MRO home page can be reached by clicking here .
Charts for SNe 1999da, 1999dk, 1999gp, 2000bk, 2000ce, and 2000cx are now located at Kevin's CTIO website. Just click here .
To access a full length published paper on the subject of V minus near infrared colors, plus our finder charts and data on SNe 1999aa, 1999cl and 1999cp see astro-ph/9912219 .
From observations over the past year we have obtained distances to 10 Type Ia supernovae. After correcting their velocities for the motion of our Galaxy within the Local Group, and correcting for the Local Group's motion with respect to the Cosmic Microwave Background Radiaton, we get the following Hubble diagram. SN 1999cl is in the Virgo cluster and has a peculiar velocity greater than 1000 km/sec. But the other 9 give a Hubble constant of 59.1 +/- 4.0 km/sec/Mpc (error includes internal error and uncertainty of the distance scale to the Large Magellanic Cloud.)
Above is a 240 second V-band exposure of MCG-02-09-003 with SN 2000eo
and three field stars indicated. This image was obtained at 07:48 UT
on 27 November 2000 (UT) by Armin Rest and Gajus Miknaitis, using
the APO 3.5-m telescope. From preliminary reduction (by Kevin
Krisciunas) with respect to the Landolt fields PG0231+051 and Rubin 149
we find V = 15.33, B-V = 0.14, V-R = 0.10, and V-I = 0.23, with
internal errors of 0.02 mag or better. Note that this is a Type IIn
SN (IAUC 7524).
Above is a 100 sec exposure of SN 2000dk in NGC 382 (see IAUC 7493),
taken by Kevin Krisciunas with the MRO 0.76-m telescope near
Ellensburg, WA, with north up, east to the left.
It was taken at 04:47 UT on 20 Sep 2000 UT. On this night
we derive V = 15.87, B-V = 0.08 (via PSF magnitudes).
Given below is a preliminary photometric sequence for some nearby
field stars.
Here is a 150 sec exposure of SN 2000I in NGC 2958 by Rest and Krisciunas
on 10 Feb 2000. V = 17.85 +/- 0.06, B-V = 0.84 +/- 0.04. I have cut
it down to one arc minute on a side.
Here is a 150 sec V-band exposure of SN 2000H in IC 454 taken on 14
February 2000 starting at 02:11:58 UT by Kevin Krisciunas with the APO
3.5-m telescope. The field is rotated 12 degrees clockwise from
north up, east to the left. Photometry will have to wait until this field
is observed on a photometric night. But it is roughly magnitude 16 1/2
.
Here is a 120 sec V-band images of SN 2000F in IC 302 by Kevin Krisciunas
and Frank Deglman, using the APO 3.5-m telescope on 4 Feb 2000 at 02:11 UT.
North is up, east to the left. This image is 4.8 arcmin on a side.
V = 18.69, B-V = 1.88. Given the radial velocity of the host galaxy
(5908 km/sec) this supernova would be 3 mag brighter if it were
a Type Ia supernova and unreddened in the host. Odds are that is not
a Type Ia SN b/c it was invisible on images taken 5 days prior to
discovery (according to Weidong Li).
Here is a V-band image of NGC 1376 and SN 1999go by Kevin Krisciunas and
Frank Deglman, using the APO 3.5-m telescope on 30 December 1999 at 01:28 UT.
North is up, east to the left. This image is 4.8 arcmin on a side.
Below is a flattened 180 sec V-band image of MCG-01-02-001 with SN 1999cw
right in the center of the field, cropped to 5 by 5 arcmin.
This image was obtained by Kevin Krisciunas
on 9 July 1999 starting at 10:14:28 UT with the Univ. WA 30-inch reflector
at Manastash Ridge.
Here is a flattenend V-band image of NGC 6038, with supernova 1999cc
designated, along with some field stars.
It is a 120 sec exposure obtained by Russet McMillan on May 15, 1999 at
08:04:31 UT. This display is about 4.8 arcmin on a side.
One can compare these
graphs to the best work so far on the evolution of light curve shapes
(Riess, Press, and Kirschner 1996). To obtain that paper click
here . See also the more recent preprint by Riess et al. by clicking
here
.
From photometry obtained with the 0.6-m LONEOS Schmidt telescope at
Anderson Mesa, Arizona on Nov 11, Nov 23, and Dec 16, 1998 (UT), we
suspected that there appeared a supernova in a galaxy whose coordinates
(2000) are RA = 4:32:09.2, DEC = +12:54:06.6.
On Feb 10, 1999, Alan Diercks obtained four images of this galaxy with the
APO 3.5-m telescope in New Mexico. Below is a 180 sec exposure obtained
through a B45 (broadband) filter.
An inspection of the E image from the POSS-II reveals the two spots,
and the POSS image was taken some time ago, so we must conclude that
the other object is NOT a supernova. Odds are that it a merged galaxy.
In fact one can see a little remnant of the sucked-in galaxy to the upper
right.
Go back to Kevin Krisciunas home page by clicking
here .
Preliminary Photometric Sequence near SN 2000eo
V +/- B-V +/- V-R +/- V-I +/-
2 16.702 0.002 0.709 0.004 0.373 0.002 0.787 0.003
3 17.523 0.003 0.841 0.006 0.462 0.004 0.954 0.004
4 18.203 0.005 1.416 0.014 0.839 0.006 1.645 0.006
Realistic uncertainties are +/- 0.02 mag. The value above are
internal errors based on photon statistics.
Preliminary Photometric Sequence near SN 2000dk (NGC 382)
RA (2000) DEC V +/- B-V +/- V-R +/- V-I +/-
SN 1 07 23.5 +32 24 23
1 1 07 23.47 +32 25 31.3 16.021 0.011 0.987 0.020 0.668 0.028 1.190 0.017
2 1 07 22.08 +32 23 23.1 12.729 0.019 0.465 0.003 0.294 0.003 0.581 0.002
3 1 07 19.88 +32 23 39.9 15.829 0.003 0.525 0.037 0.315 0.025 0.693 0.041
4 1 07 22.15 +32 22 18.4 15.988 0.013 0.667 0.017 0.394 0.028 0.747 0.014
5 1 07 21.13 +32 21 51.0 14.606 0.004 0.794 0.011 0.474 0.010 0.863 0.012
6 1 07 13.74 +32 20 46.7 14.324 0.006 0.687 0.012 0.793 0.009
7 1 07 17.55 +32 20 16.3 12.928 0.006 0.931 0.001 0.542 0.003 0.991 0.008
8 1 07 38.57 +32 21 20.3 15.383 0.014 0.592 0.007 0.366 0.019 0.719 0.023
This is a 90 sec V-band exposure of SN 2000cf in MCG +11-19-25 by
Armin Rest and Russet McMillan, using the APO 3.5-m telescope
on 11 May 2000 starting at 04:26:22 UT. V = 17.11, B-V = +0.09.
IAUC No. 7423 indicates that maximum occurred on May 6 +/- 3 UT. 
Photometric Sequence near SN 2000cf (MCG +11-19-25)
Star RA (2000) DEC V +/- B-V +/- V-R +/- V-I +/-
SN 15:52:56.2 +65:56:13
1 15:52:58.0 +65:55:36 15.963 0.005 0.709 0.023 0.424 0.009 0.817 0.016
2 15:52:54.3 +65:56:56 17.897 0.009 0.757 0.020 0.472 0.011 0.934 0.015
3 15:52:41.7 +65:57:29 16.875 0.006 0.632 0.018 0.405 0.007 0.774 0.016
4 15:52:36.1 +65:57:08 18.126 0.017 1.040 0.035 0.634 0.013 1.238 0.019
5 15:52:47.9 +65:55:09 17.786 0.006 0.695 0.027 0.439 0.010 0.846 0.018
6 15:52:42.6 +65:54:46 17.090 0.006 1.395 0.024 0.856 0.010 1.624 0.016
7 15:53:08.8 +65:55:55 19.457 0.029 1.536 0.067 1.148 0.020 2.555 0.034
Here is a 180 sec V-band exposures of SN 2000cb in IC 1158 by
Kevin Krisciunas and Camron Hastings, using the APO 3.5-m telescope
on 1 May 2000
starting at 09:51:24 UT. It is 4.8 arcmin on a side. North is up,
east to the left. V = 17.96, B-V = 0.88, with uncertainties of +/- 0.02 mag.
The photometric sequence given below is based on the calibration of
May 1st, a clear night with standards fields observed 4 times.
Realistic minimum uncertainties of the magnitudes and colors are +/- 0.02.
Photometric Sequence near SN 2000cb (IC 1158)
Star RA (2000) DEC V +/- B-V +/- V-R +/- V-I +/-
1 16 01 35.23 +01 41 02.4 16.200 0.001 0.698 0.002 0.390 0.001 0.779 0.001
2 16 01 36.47 +01 41 40.3 16.546 0.002 0.431 0.003 0.267 0.003 0.570 0.003
3 16 01 37.99 +01 43 15.0 15.582 0.001 0.819 0.002 0.470 0.001
4 16 01 37.68 +01 44 01.9 15.235 0.001 0.808 0.001
5 16 01 34.87 +01 43 30.4 18.491 0.006 0.996 0.012 0.586 0.008 1.154 0.009
6 16 01 33.08 +01 44 09.6 18.334 0.005 1.085 0.012 0.627 0.007 1.207 0.007
7 16 01 28.86 +01 44 08.6 18.482 0.005 0.696 0.010 0.405 0.008 0.812 0.010
8 16 01 25.03 +01 42 36.7 16.390 0.001 0.600 0.002 0.351 0.001 0.717 0.002
Coordinates are with respect o USNO-A2.0, determined by Brian Skiff.
Here is a 180 sec V-band exposures of SN 2000J in UGC 8510 by Armin Rest
and Kevin Krisciunas, using the APO 3.5-m telescope on 10 Feb 2000
starting at 07:31:42 UT. It is 4.8 arcmin on a side. North is up,
east to the left. V = 18.52 +/- 0.10, B-V = 1.14 +/- 0.08. 
Photometric Sequence near SN 1999cc (NGC 6038)
Star RA (2000) DEC code V +/- B-V +/- V-R +/- V-I +/- numbers of measures
2 16 02 44.8 +37 19 37 A 16.371 0.014 0.930 0.012 0.535 0.009 1.041 0.006 5 5 4 5
3 16 02 34.5 +37 20 36 A 15.648 0.011 0.573 0.013 0.342 0.011 0.717 0.007 5 5 4 5
4 16 02 48.6 +37 21 03 A 18.748 0.011 1.413 0.016 0.890 0.009 1.770 0.009 5 5 4 5
5 16 02 51.1 +37 21 12 S 19.175 0.010 0.359 0.014 0.234 0.012 0.480 0.016 5 5 4 5
6 16 02 44.2 +37 21 50 S 18.033 0.010 0.633 0.011 0.378 0.011 0.789 0.008 5 5 4 5
7 16 02 43.0 +37 21 58 S 18.072 0.011 1.343 0.009 0.820 0.014 1.584 0.007 5 5 4 5
8 16 02 41.2 +37 22 51 A 18.983 0.012 0.575 0.013 0.355 0.011 0.732 0.012 5 5 4 4
9 16 02 39.2 +37 23 21 A 17.154 0.010 0.552 0.013 0.333 0.012 0.703 0.007 5 5 4 5
10 16 02 32.9 +37 23 17 A 18.555 0.006 0.953 0.023 0.562 0.005 1.044 0.010 2 2 2 3
Coordinates measured by Brian Skiff. Code = A means source was USNO-A2.0. Code = S means
coordinates were estimated from Digital Sky Survey images using SkyView.
Differential V-band photometry of star 2 vs. star 3 exhibits constancy to
+/- 0.012 mag; star 2 vs. star 6 gives Delta V constant to +/- 0.014 mag; star
2 vs. star 9 gives Delta V constant to +/- 0.016 mag.
And here is the multi-color light curve SN 1999cc. I have determined
a photometric sequence of stars in the field and reduced the supernova's
aperture magnitudes using the aperture magnitudes of four field stars
in this field (numbers 2, 3, 6, and 9). 
