ASTROSAT CZTI

Data Quality Report

Orbit 51722

Creation date: 2025-04-22T12:01:25.693262
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/AS1A13_031T01_9000006462_51722cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51722cztM0_level2_quad_clean.evt
Size (bytes)497,180,16097,197,120
Size474.1 MB 92.7 MB
Events in quadrant A6,706,818566,254
Events in quadrant B3,578,434690,300
Events in quadrant C3,889,436624,041
Events in quadrant D3,696,496584,300

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0247633
B0156512
C0164772
D0160722

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A685986512.611168%
B68591021.487097%
C68591772.580551%
D68591211.764106%

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 7654 6860 739 739 9.66% 10.77%
B 7654 6860 45 45 0.59% 0.66%
C 7654 6860 123 123 1.61% 1.79%
D 7654 6860 102 102 1.33% 1.49%

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 4 175 1611439 9676.74 679 663 166.5
A 0 111 804022 4826.18 679 663 166.5
A 8 248 674165 4046.06 679 663 166.5
B 1 223 206702 1327.66 718 693 155.2
B 9 223 129346 829.13 718 693 155.2
B 0 213 68819 439.05 718 693 155.2
C 9 38 354871 1828.17 707 702 193.7
C 13 3 238356 1226.74 707 702 193.7
C 1 243 103789 532.12 707 702 193.7
D 8 176 473039 2396.26 698 674 197.1
D 11 176 130145 656.79 698 674 197.1
D 2 249 96849 487.89 698 674 197.1

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