ASTROSAT CZTI

Data Quality Report

Orbit 20170102_A02_075T02_9000000940_level2

Creation date: 2025-11-09T00:56:39.090194
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_075T02_9000000940cztM0_level2.fits modeM0/AS1A02_075T02_9000000940cztM0_level2_quad_clean.evt
Size (bytes)74,139,84061,156,800
Size70.7 MB 58.3 MB
Events in quadrant A448,102345,668
Events in quadrant B439,726350,841
Events in quadrant C458,134332,683
Events in quadrant D391,060313,785

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0194420
B0168730
C0161780
D0173670

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0260

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A73013855.273250%
B73012483.396795%
C73011982.711957%
D73013524.821257%

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 9891 7301 0 0 0.00% 0.00%
B 9891 7301 0 0 0.00% 0.00%
C 9891 7301 0 0 0.00% 0.00%
D 9891 7301 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 29 415 9.7 116 109 31.5
A 7 110 346 7.52 116 109 31.5
A 15 236 327 6.91 116 109 31.5
B 2 9 360 9.71 116 111 25.6
B 3 17 311 7.8 116 111 25.6
B 3 80 302 7.45 116 111 25.6
C 3 126 328 6.56 120 112 32.9
C 1 80 313 6.1 120 112 32.9
C 12 249 312 6.07 120 112 32.9
D 11 82 295 6.32 111 102 30.5
D 6 232 292 6.22 111 102 30.5
D 10 113 291 6.19 111 102 30.5

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