ASTROSAT CZTI

Data Quality Report

Orbit 20210620_A10_071T42_9000004476_level2

Creation date: 2021-06-22T11:18:25.142774
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/AS1A10_071T42_9000004476cztM0_level2_bc.evt modeM0/AS1A10_071T42_9000004476cztM0_level2_quad_clean.evt
Size (bytes)3,481,073,2801,003,939,200
Size3.2 GB 957.4 MB
Events in quadrant A16,598,9196,472,095
Events in quadrant B40,019,2976,430,923
Events in quadrant C20,751,5896,124,764
Events in quadrant D22,745,3246,027,202

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015920
B015920
C015920
D015920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01626550
B02421170
C01800180
D01787240

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7808311281.444617%
B7808324883.186353%
C7808326023.332351%
D7808313911.781438%

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 91009 78074 0 0 0.00% 0.00%
B 91009 78077 82 82 0.09% 0.11%
C 91009 78075 34 34 0.04% 0.04%
D 91009 78079 82 82 0.09% 0.11%

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 13 254 133797 139.91 4293 4221 926.1
A 0 226 26725 24.3 4293 4221 926.1
A 12 194 25868 23.37 4293 4221 926.1
B 6 159 21365956 26387.92 4307 4209 809.5
B 5 172 693211 851.12 4307 4209 809.5
B 0 190 429535 525.4 4307 4209 809.5
C 0 10 4324986 4506.21 4085 4071 958.9
C 3 233 176337 179.65 4085 4071 958.9
C 14 67 172862 176.03 4085 4071 958.9
D 8 195 4353885 4572.62 4181 4053 951.3
D 13 249 689103 720.14 4181 4053 951.3
D 2 250 674916 705.22 4181 4053 951.3

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