ASTROSAT CZTI

Data Quality Report

Orbit 34506

Creation date: 2022-02-15T09:55:12.306023
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/AS1A05_156T01_9000004928_34506cztM0_level2.evt modeM0/AS1A05_156T01_9000004928_34506cztM0_level2_quad_clean.evt
Size (bytes)2,208,669,120275,022,720
Size2.1 GB 262.3 MB
Events in quadrant A11,150,9441,727,283
Events in quadrant B15,898,3661,725,751
Events in quadrant C12,108,0491,734,001
Events in quadrant D26,123,2161,496,961

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04900
B04900
C04900
D04900

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0488086
B0631325
C0505755
D0943835

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0760
B0760
C0760
D0760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A23900460.192469%
B2390015636.539749%
C23900430.179916%
D23900367315.368201%

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 31515 23905 18 18 0.06% 0.08%
B 31515 23905 990 990 3.14% 4.14%
C 31515 23905 22 22 0.07% 0.09%
D 31515 23905 3176 3176 10.08% 13.29%

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 9 143 131367 232.67 2789 2736 552.8
A 10 83 113852 200.99 2789 2736 552.8
A 15 169 54352 93.36 2789 2736 552.8
B 5 172 4158849 8174.75 2686 2618 508.4
B 0 229 456702 893.12 2686 2618 508.4
B 4 171 196707 381.75 2686 2618 508.4
C 15 214 1005925 1630.61 2685 2705 615.2
C 14 67 428203 691.59 2685 2705 615.2
C 0 10 118967 188.97 2685 2705 615.2
D 12 17 4225667 6881.67 2525 2455 613.7
D 8 195 4168724 6788.88 2525 2455 613.7
D 2 250 1880149 3059.68 2525 2455 613.7

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