ASTROSAT CZTI

Data Quality Report

Orbit 20201218_A10_067T01_9000004076_level2

Creation date: 2021-01-06T19:52:44.046856
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/AS1A10_067T01_9000004076cztM0_level2_bc.evt modeM0/AS1A10_067T01_9000004076cztM0_level2_quad_clean.evt
Size (bytes)769,654,080221,022,720
Size734.0 MB 210.8 MB
Events in quadrant A3,823,9721,405,126
Events in quadrant B3,826,7381,418,527
Events in quadrant C3,700,5861,349,862
Events in quadrant D10,719,1331,276,262

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0374350
B0374490
C0374940
D0622700

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03740
B03740
C03740
D03740

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0280
C0310
D0300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A180403191.768293%
B180403241.796009%
C180353732.068201%
D18023221512.289852%

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 18326 16310 0 0 0.00% 0.00%
B 18326 16309 2 2 0.01% 0.01%
C 18326 16310 0 0 0.00% 0.00%
D 18326 16310 817 817 4.46% 5.01%

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 12 96 72568 342.18 970 953 209.3
A 13 254 24048 110.35 970 953 209.3
A 0 226 5970 23.97 970 953 209.3
B 0 230 28835 151.31 971 947 184.3
B 0 183 27047 141.61 971 947 184.3
B 4 200 14192 71.86 971 947 184.3
C 3 233 65206 295.51 924 918 217.6
C 2 16 45646 205.6 924 918 217.6
C 7 220 24640 109.04 924 918 217.6
D 1 52 4846064 23447.35 902 873 206.6
D 5 222 1245042 6020.91 902 873 206.6
D 8 195 647449 3128.98 902 873 206.6

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