ASTROSAT CZTI

Data Quality Report

Orbit 20190131_A06_006T01_9000002684_level2

Creation date: 2025-11-26T21:55:33.806226
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/AS1A06_006T01_9000002684cztM0_level2.fits modeM0/AS1A06_006T01_9000002684cztM0_level2_quad_clean.evt
Size (bytes)716,351,040649,995,840
Size683.2 MB 619.9 MB
Events in quadrant A4,391,5183,743,600
Events in quadrant B4,272,5263,887,059
Events in quadrant C4,314,9563,727,747
Events in quadrant D3,667,0443,281,384

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015020
B015020
C015020
D015020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01210
B01210
C01210
D01210

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01875130
B01586020
C01541100
D02318000

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7356155057.483585%
B7356111021.498076%
C7356111191.521186%
D7356158847.998804%

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 85636 73558 0 0 0.00% 0.00%
B 85636 73546 0 0 0.00% 0.00%
C 85636 73558 0 0 0.00% 0.00%
D 85635 73547 0 0 0.00% 0.00%

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 0 29 4233 11.23 1144 1074 281.3
A 7 110 3641 9.12 1144 1074 281.3
A 9 19 3382 8.2 1144 1074 281.3
B 2 9 3414 10.45 1130 1079 223.4
B 2 8 2893 8.12 1130 1079 223.4
B 14 254 2743 7.45 1130 1079 223.4
C 1 81 3264 7.61 1138 1064 289.2
C 1 80 3228 7.48 1138 1064 289.2
C 12 241 3084 6.98 1138 1064 289.2
D 10 190 2736 6.36 1047 954 280.1
D 3 14 2707 6.26 1047 954 280.1
D 6 231 2600 5.88 1047 954 280.1

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