ASTROSAT CZTI

Data Quality Report

Orbit 20920

Creation date: 2024-06-27T18:21:13.825360
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/AS1C04_001T01_9000003082_20920cztM0_level2.evt modeM0/AS1C04_001T01_9000003082_20920cztM0_level2_quad_clean.evt
Size (bytes)526,472,640134,363,520
Size502.1 MB 128.1 MB
Events in quadrant A4,066,677913,668
Events in quadrant B4,103,858904,423
Events in quadrant C3,351,619874,658
Events in quadrant D3,933,993876,016

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0169131
B0166851
C0147761
D0167471

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71811442.005292%
B71822673.717627%
C71821792.492342%
D71821241.726539%

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 7366 7182 22 22 0.30% 0.31%
B 7367 7183 102 102 1.38% 1.42%
C 7367 7183 1 1 0.01% 0.01%
D 7367 7183 17 17 0.23% 0.24%

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 6 16 735814 4242.39 860 840 173.2
A 5 16 19669 108.68 860 840 173.2
A 0 226 7539 38.67 860 840 173.2
B 3 64 313131 1939.81 844 820 161.0
B 7 220 225322 1394.42 844 820 161.0
B 0 219 60005 367.61 844 820 161.0
C 14 238 128821 673.26 818 824 190.1
C 8 128 8664 41.24 818 824 190.1
C 9 54 6467 29.68 818 824 190.1
D 1 20 579487 2864.76 842 818 202.0
D 1 52 108228 531.74 842 818 202.0
D 2 234 32474 156.72 842 818 202.0

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