ASTROSAT CZTI

Data Quality Report

Orbit 20180807_T02_077T01_9000002282_level2

Creation date: 2025-11-23T22:42:43.317611
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_077T01_9000002282cztM0_level2.fits modeM0/AS1T02_077T01_9000002282cztM0_level2_quad_clean.evt
Size (bytes)145,834,560136,428,480
Size139.1 MB 130.1 MB
Events in quadrant A920,652826,404
Events in quadrant B875,340828,028
Events in quadrant C896,884806,494
Events in quadrant D786,666732,481

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0340
B0340
C0340
D0340

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02760
B02760
C02760
D02760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0322250
B0303840
C0294640
D0321160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A135712872.114804%
B135711691.245302%
C135711050.773709%
D135712331.716896%

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 16085 13569 0 0 0.00% 0.00%
B 16085 13569 0 0 0.00% 0.00%
C 16085 13569 0 0 0.00% 0.00%
D 16085 13566 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 29 914 11.85 239 229 57.8
A 0 30 710 8.32 239 229 57.8
A 7 110 704 8.22 239 229 57.8
B 2 9 681 9.62 232 224 47.5
B 5 128 592 7.75 232 224 47.5
B 5 225 576 7.41 232 224 47.5
C 1 81 674 7.36 236 224 61.1
C 1 80 649 6.96 236 224 61.1
C 12 250 647 6.92 236 224 61.1
D 15 46 601 6.5 225 208 60.5
D 6 231 569 5.97 225 208 60.5
D 6 67 559 5.81 225 208 60.5

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