Night Report 2014-04-22

Observers: Sandra Benitez, Joe Polshaw

Support: Stefan Taubenberger

TAT on duty: Morgan Fraser, Nancy Elias-Rosa, Joe Anderson



start: wind 3.3 m/s; temp. 14.9 C; humid. 11%; Clear. 

middle: wind 4 m/s; temp. 16 C: humid. 6.6%; Clear.

end: wind 4.5 m/s; temp. 14.7; humid. 14%; Clear

Conditions were photometric. The seeing was around 1" for the whole night.





-- Bias

-- Spec flats

-- Arcs


-- Arcs



Target                   Type                         UT-Start         Filter/Grism           Slit (")         Seeing (")      Notes

LSQ14an               Follow. (SPEC)            23:43             gr13                      1                 1                    (1)

LTT3864               STD (SPEC)                 02:38            gr11/13/16           1                 1.2                  -

SN2013dg            Follow (IMAG)             03:00            i                             N/A             0.9                 (2)

LSQ14pt               Follow (IMAG)             04:50            gri                          N/A             1                     -

CSS140421...       Class.                         05:44            gr13                       1                 1.2                 (3)

LSQ14bdw            Class.                         06:01            gr13                       1                 0.9                (4)

LSQ14bdg            Class.                         06:29            gr13                       1                 1.1                 (5)

LSQ14ayl             Class.                          06:53            gr13                       1                 0.8                 (6)

SNHunt241          Class.                          07:33            gr13                      1                 1.2                 (7)

EG274                  STD (SPEC)                  08:07            gr11/13/16            1                0.8                  -

SN2009ip             Follow. (IMAG)            08:30             B                           N/A             0.9                   -

LSQ14azl             Class.                         09:01             gr13                       N/A            1.0                 (8) 

LSQ14axu            Class.                        09:18             gr13                       N/A            1.0                 (9) 

CSS140407...       Class.                        09:45             gr13                       N/A            1.0                  (10)  

(1) 4*2400s, spectra look as though they have very good S/N.

(2) 27*200s. Seeing began at ~0.86" and fluctuated between 0.9 - 1 during the OB.

(3) CSS140421-142042+031602. Not sure what this is. Blue spectrum with emission at: ~4105A, 4401A, 4775A, 5366A, ~6280A, 6764A, 8356A.The light curve may show some past variability. Photo ZP of host (from SDSS) is z~0.22, which gives M~ -21.8. However, if this is correct then there is no H emission. If the feature at 8356A is H-alpha, then z~0.27. Otherwise, the emission at 6764A could be H-alpha, which gives z~0.03. Cannot find a consistent match with other Balmer lines at these redshifts. The lines in the blue are much stronger than those in the red (particularly 4105A and 5366A). The line at 5366A looks as though it has a broader component. Interesting object!

(4) SN type Ia, either normal or 91T-like, a few days before max, z~0.1.

(5) Normal SN type Ia, around maximum, z=0.07

(6) Most likely a type Ic, anything from max. to a couple of weeks after max. z~0.05. 

(7) Also known as PSNJ14192892-0537361. Host galaxy z=0.035. SN type II about a week after max.

(8) Variable star.

(9) Two objects close to each other. Difficult to tell which is the transient - but both are in the slit. The extracted spectra of both are noisy, unclear what they are.

(10) CSS140407-170408+090904. There's nothing there in the acquisition image (just did 30 second exposure), and not enough time to investigate further so we abandoned this one.