ASTROSAT CZTI

Data Quality Report

Orbit 20211228_T04_077T01_9000004824_level2

Creation date: 2021-12-31T10:58:22.408302
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/AS1T04_077T01_9000004824cztM0_level2_bc.evt modeM0/AS1T04_077T01_9000004824cztM0_level2_quad_clean.evt
Size (bytes)3,021,396,480484,871,040
Size2.8 GB 462.4 MB
Events in quadrant A12,402,3582,934,206
Events in quadrant B14,011,4943,090,845
Events in quadrant C12,909,5943,108,558
Events in quadrant D49,263,0502,601,814

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01110750
B01070010
C0987420
D02335560

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08780
B08780
C08780
D08780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4291535808.342072%
B4291513823.220319%
C429163690.859819%
D429151438833.526739%

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 58177 42917 5 5 0.01% 0.01%
B 58177 42917 73 73 0.13% 0.17%
C 58177 42918 44 44 0.08% 0.10%
D 58177 42917 3031 3031 5.21% 7.06%

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 15 169 3310736 6935.69 2210 2179 477.0
A 15 237 356539 742.84 2210 2179 477.0
A 13 6 149150 308.09 2210 2179 477.0
B 5 172 2768864 6150.0 2312 2263 449.9
B 5 255 530532 1174.31 2312 2263 449.9
B 4 251 274515 605.2 2312 2263 449.9
C 15 214 1296295 2556.13 2277 2263 506.2
C 3 233 620729 1221.67 2277 2263 506.2
C 0 10 569757 1120.98 2277 2263 506.2
D 12 235 25143768 53840.07 1979 1927 467.0
D 8 195 9724917 20821.32 1979 1927 467.0
D 2 250 2543351 5442.34 1979 1927 467.0

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