ASTROSAT CZTI

Data Quality Report

Orbit 20211101_C07_001T01_9000004752_level2

Creation date: 2021-11-03T16:12:55.594572
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/AS1C07_001T01_9000004752cztM0_level2_bc.evt modeM0/AS1C07_001T01_9000004752cztM0_level2_quad_clean.evt
Size (bytes)4,237,519,6801,308,579,840
Size3.9 GB 1.2 GB
Events in quadrant A14,683,1729,060,917
Events in quadrant B27,931,3058,717,488
Events in quadrant C18,649,4039,072,873
Events in quadrant D62,279,2897,943,401

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01429930
B02027490
C01554660
D03042420

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014380
B014380
C014380
D014380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02620
B02620
C02620
D02620

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A70589990.140248%
B7058968059.640312%
C705899201.303319%
D70589935813.257023%

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 95856 70589 4 4 0.00% 0.01%
B 95855 70573 605 605 0.63% 0.86%
C 95856 70587 193 193 0.20% 0.27%
D 95856 70581 2662 2662 2.78% 3.77%

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 6 137151 168.65 3627 3579 792.0
A 13 254 124746 152.98 3627 3579 792.0
A 0 191 112971 138.12 3627 3579 792.0
B 5 172 8660350 12496.11 3500 3426 692.8
B 5 200 2568278 3702.32 3500 3426 692.8
B 0 219 915338 1316.33 3500 3426 692.8
C 9 54 1469562 1765.33 3581 3554 830.4
C 0 10 1454833 1747.6 3581 3554 830.4
C 1 241 811180 972.52 3581 3554 830.4
D 8 195 19105414 21370.26 3350 3279 893.9
D 12 227 6686844 7477.15 3350 3279 893.9
D 7 80 4843388 5414.81 3350 3279 893.9

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