ASTROSAT CZTI

Data Quality Report

Orbit 20028

Creation date: 2024-06-27T18:10:17.237996
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/AS1C04_001T01_9000002984_20028cztM0_level2.evt modeM0/AS1C04_001T01_9000002984_20028cztM0_level2_quad_clean.evt
Size (bytes)1,845,008,640321,825,600
Size1.7 GB 306.9 MB
Events in quadrant A11,365,8062,131,623
Events in quadrant B11,553,7842,127,107
Events in quadrant C10,619,0182,082,833
Events in quadrant D20,807,5221,844,668

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04600
B04600
C04600
D04600

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0330
D0330

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0490014
B0491697
C0463566
D0774154

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A226663761.658872%
B226653031.336863%
C226652711.195676%
D22665429218.936687%

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 25891 22670 163 163 0.63% 0.72%
B 25891 22670 45 45 0.17% 0.20%
C 25891 22670 0 0 0.00% 0.00%
D 25891 22670 3962 3962 15.30% 17.48%

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 14 238 460987 855.4 2679 2623 535.8
A 5 16 366799 679.63 2679 2623 535.8
A 14 254 163423 300.09 2679 2623 535.8
B 7 220 501929 995.61 2667 2600 501.5
B 0 189 180416 354.54 2667 2600 501.5
B 0 197 164997 323.8 2667 2600 501.5
C 14 238 403328 669.78 2579 2591 598.3
C 3 233 121364 198.51 2579 2591 598.3
C 0 207 25225 37.83 2579 2591 598.3
D 7 38 9290733 15643.56 2465 2391 593.7
D 1 52 641117 1075.75 2465 2391 593.7
D 7 238 406979 681.41 2465 2391 593.7

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