ASTROSAT CZTI

Data Quality Report

Orbit 20161121_A02_046T01_9000000814_level2

Creation date: 2021-08-25T18:33:37.488307
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

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/AS1A02_046T01_9000000814cztM0_level2_bc.evt modeM0/AS1A02_046T01_9000000814cztM0_level2_quad_clean.evt
Size (bytes)819,475,200421,344,000
Size781.5 MB 401.8 MB
Events in quadrant A7,301,2942,808,583
Events in quadrant B5,154,6862,845,645
Events in quadrant C4,570,8092,825,174
Events in quadrant D6,231,3862,714,306

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0460
B0460
C0460
D0460

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0545220
B0486360
C0465980
D0508520

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04680
B04680
C04660
D04680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A227944992.189173%
B227973781.658113%
C227962501.096684%
D227943181.395104%

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 32677 22796 20 20 0.06% 0.09%
B 32677 22796 9 9 0.03% 0.04%
C 32677 22796 0 0 0.00% 0.00%
D 32677 22797 5 5 0.02% 0.02%

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 13 34 2254954 8729.94 1176 1153 258.2
A 8 15 244705 943.38 1176 1153 258.2
A 0 31 223495 861.23 1176 1153 258.2
B 0 219 171169 759.78 1184 1155 223.8
B 15 204 157983 700.86 1184 1155 223.8
B 0 214 75648 332.91 1184 1155 223.8
C 1 16 18732 68.3 1159 1143 257.5
C 8 222 10015 34.45 1159 1143 257.5
C 13 61 7371 24.18 1159 1143 257.5
D 2 63 900032 3280.34 1169 1126 274.0
D 12 221 277520 1008.63 1169 1126 274.0
D 2 136 132348 478.86 1169 1126 274.0

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