ASTROSAT CZTI

Data Quality Report

Orbit 51689

Creation date: 2025-04-22T12:01:11.830906
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_51689cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51689cztM0_level2_quad_clean.evt
Size (bytes)705,078,720119,050,560
Size672.4 MB 113.5 MB
Events in quadrant A6,653,544788,802
Events in quadrant B4,657,613865,412
Events in quadrant C7,590,560684,745
Events in quadrant D6,533,495669,846

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0256582
B0197380
C0285550
D0254480

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01720
B01720
C01720
D01720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A85752953.440233%
B8576991.154384%
C8576122214.249067%
D85767388.605410%

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 8575 8575 208 208 2.43% 2.43%
B 8576 8576 39 39 0.45% 0.45%
C 8576 8576 929 929 10.83% 10.83%
D 8576 8576 668 668 7.79% 7.79%

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 3 14 1642455 7310.82 915 894 224.5
A 12 250 329021 1461.34 915 894 224.5
A 7 206 276954 1229.45 915 894 224.5
B 10 254 281132 1426.66 917 884 196.4
B 0 171 197799 1002.44 917 884 196.4
B 5 185 86457 435.63 917 884 196.4
C 15 189 3213701 14134.09 843 837 227.3
C 13 3 404342 1775.11 843 837 227.3
C 15 231 181593 795.19 843 837 227.3
D 3 12 1157462 4896.39 855 824 236.2
D 7 60 446460 1886.51 855 824 236.2
D 7 159 299097 1262.68 855 824 236.2

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