ASTROSAT CZTI

Data Quality Report

Orbit 20180728_T02_073T01_9000002260_level2

Creation date: 2025-11-23T18:42:18.434483
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/AS1T02_073T01_9000002260cztM0_level2.fits modeM0/AS1T02_073T01_9000002260cztM0_level2_quad_clean.evt
Size (bytes)1,992,153,6001,800,656,640
Size1.9 GB 1.7 GB
Events in quadrant A12,156,37810,561,070
Events in quadrant B11,735,75610,743,620
Events in quadrant C12,079,31610,177,212
Events in quadrant D10,266,0448,960,980

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A041900
B041900
C041900
D041900

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04390920
B04347810
C04413340
D05277860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03400
B03400
C03400
D03410

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20571640271.957553%
B20571630421.478738%
C20571620811.011589%
D205716114685.574676%

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 244642 205682 0 0 0.00% 0.00%
B 244642 205690 0 0 0.00% 0.00%
C 244642 205696 0 0 0.00% 0.00%
D 244642 205638 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 11749 11.34 3162 2960 775.2
A 7 110 9568 8.52 3162 2960 775.2
A 15 236 9110 7.93 3162 2960 775.2
B 2 9 9518 10.83 3097 2951 606.1
B 2 8 7996 8.32 3097 2951 606.1
B 5 128 7623 7.71 3097 2951 606.1
C 1 80 9110 7.55 3187 2970 813.6
C 1 81 9034 7.45 3187 2970 813.6
C 12 241 8343 6.6 3187 2970 813.6
D 6 231 7332 5.95 2933 2668 783.5
D 3 14 7254 5.85 2933 2668 783.5
D 10 189 7103 5.66 2933 2668 783.5

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