ASTROSAT CZTI

Data Quality Report

Orbit 20170208_A02_031T01_9000001014_level2

Creation date: 2025-11-09T12:36:43.915821
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/AS1A02_031T01_9000001014cztM0_level2.fits modeM0/AS1A02_031T01_9000001014cztM0_level2_quad_clean.evt
Size (bytes)194,800,320216,725,760
Size185.8 MB 206.7 MB
Events in quadrant A1,164,8581,323,021
Events in quadrant B1,147,0421,347,637
Events in quadrant C1,171,5161,298,330
Events in quadrant D1,009,3961,187,729

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0390
B0410
C0370
D0380

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04180
B04210
C04180
D04200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0426220
B0442980
C0423730
D0499600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A204071680.823247%
B203971990.975634%
C20403940.460717%
D204403651.785714%

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 29111 20567 0 0 0.00% 0.00%
B 29111 20565 0 0 0.00% 0.00%
C 29111 20563 0 0 0.00% 0.00%
D 29111 20605 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 1175 11.41 303 284 78.1
A 7 110 978 8.89 303 284 78.1
A 0 30 880 7.64 303 284 78.1
B 2 9 987 11.19 302 287 62.5
B 3 80 782 7.91 302 287 62.5
B 12 226 773 7.77 302 287 62.5
C 1 80 894 7.4 309 288 81.8
C 1 81 845 6.81 309 288 81.8
C 1 65 810 6.38 309 288 81.8
D 6 231 758 6.34 287 260 78.5
D 3 14 741 6.13 287 260 78.5
D 7 3 732 6.01 287 260 78.5

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