ASTROSAT CZTI

Data Quality Report

Orbit 01827

Creation date: 2024-06-27T14:12:56.731209
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/AS1G02_021T08_9000000302_01827cztM0_level2.evt modeM0/AS1G02_021T08_9000000302_01827cztM0_level2_quad_clean.evt
Size (bytes)1,307,419,20076,775,040
Size1.2 GB 73.2 MB
Events in quadrant A9,401,322450,194
Events in quadrant B11,885,921455,922
Events in quadrant C8,992,916452,141
Events in quadrant D8,813,759438,114

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B110
C1-1-1
D1-1-1

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0333392
B04072018
C0320772
D03165211

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7594570.750593%
B75922403.161222%
C7594520.684751%
D7592931.224974%

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 8014 7595 373 373 4.65% 4.91%
B 8014 7594 1513 1513 18.88% 19.92%
C 8014 7595 307 307 3.83% 4.04%
D 8014 7594 379 379 4.73% 4.99%

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 15 236 11820 15.63 2456 2470 598.2
A -1 -1 -1 -1.0 2456 2470 598.2
A -1 -1 -1 -1.0 2456 2470 598.2
B 8 3 2281601 3794.15 2525 2538 600.7
B 0 220 19858 28.83 2525 2538 600.7
B 4 48 9988 12.4 2525 2538 600.7
C 12 4 9347 10.71 2302 2384 650.2
C -1 -1 -1 -1.0 2302 2384 650.2
C -1 -1 -1 -1.0 2302 2384 650.2
D 7 34 142959 200.63 2250 2336 700.9
D 2 54 113944 159.23 2250 2336 700.9
D 7 85 38969 52.26 2250 2336 700.9

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