ASTROSAT CZTI

Data Quality Report

Orbit 20171211_A04_124T01_9000001766_level2

Creation date: 2018-01-05T19:57:08.796304
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A04_124T01_9000001766cztM0_level2_bc.evt modeM0/AS1A04_124T01_9000001766cztM0_level2_quad_clean.evt
Size (bytes)7,493,382,7203,545,498,880
Size7.0 GB 3.3 GB
Events in quadrant A45,360,33323,961,759
Events in quadrant B60,017,42124,088,774
Events in quadrant C37,178,22323,742,388
Events in quadrant D71,158,90222,297,683

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A039560
B039560
C039560
D039560

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04277190
B04827310
C03964430
D05037410

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02810
B02810
C02810
D02810

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19429432681.681987%
B19429486494.451501%
C19429411160.574387%
D19429484374.342388%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 222367 194273 205 205 0.09% 0.11%
B 222367 194270 178 178 0.08% 0.09%
C 222367 194281 10 10 0.00% 0.01%
D 222367 194269 2077 2077 0.93% 1.07%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 14 63 2006211 949.42 9582 9395 2103.2
A 1 162 1667526 788.39 9582 9395 2103.2
A 6 254 1140610 537.86 9582 9395 2103.2
B 4 239 13250278 7069.14 9612 9330 1873.1
B 15 204 3741749 1992.68 9612 9330 1873.1
B 3 64 1923384 1021.88 9612 9330 1873.1
C 0 10 108352 47.83 9395 9284 2071.1
C 14 234 94993 41.38 9395 9284 2071.1
C 0 207 68683 28.68 9395 9284 2071.1
D 1 52 14625815 6598.52 9283 8937 2215.2
D 8 195 7424100 3347.44 9283 8937 2215.2
D 13 122 4759057 2144.35 9283 8937 2215.2

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter