ASTROSAT CZTI

Data Quality Report

Orbit 21539

Creation date: 2024-06-27T18:29:19.901200
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/AS1T03_138T04_9000003180_21539cztM0_level2.evt modeM0/AS1T03_138T04_9000003180_21539cztM0_level2_quad_clean.evt
Size (bytes)364,371,84064,103,040
Size347.5 MB 61.1 MB
Events in quadrant A2,587,113412,670
Events in quadrant B2,675,297416,942
Events in quadrant C2,631,185388,258
Events in quadrant D2,809,260380,597

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0104101
B0106971
C0105901
D0112521

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0980
B0980
C0980
D0980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4885501.023541%
B4885951.944729%
C4885731.494371%
D4885571.166837%

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 4885 4885 0 0 0.00% 0.00%
B 4885 4885 13 13 0.27% 0.27%
C 4885 4885 6 6 0.12% 0.12%
D 4885 4885 40 40 0.82% 0.82%

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 7152 48.69 671 660 133.3
A 0 226 5868 39.06 671 660 133.3
A 3 137 5167 33.8 671 660 133.3
B 3 64 42131 330.85 665 651 125.4
B 0 230 20702 159.93 665 651 125.4
B 12 111 14617 111.4 665 651 125.4
C 14 238 101591 688.93 630 636 146.5
C 0 239 67267 454.7 630 636 146.5
C 13 61 4348 25.33 630 636 146.5
D 1 52 196728 1269.32 639 620 154.5
D 14 35 161103 1038.74 639 620 154.5
D 13 153 23512 148.17 639 620 154.5

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