ASTROSAT CZTI

Data Quality Report

Orbit 20181018_T03_018T01_9000002442_level2

Creation date: 2025-11-25T07:07:47.604225
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/AS1T03_018T01_9000002442cztM0_level2.fits modeM0/AS1T03_018T01_9000002442cztM0_level2_quad_clean.evt
Size (bytes)2,136,490,5601,818,380,160
Size2.0 GB 1.7 GB
Events in quadrant A13,058,42210,288,800
Events in quadrant B12,593,09610,467,635
Events in quadrant C12,699,7649,903,212
Events in quadrant D10,962,7389,027,547

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04995630
B05156230
C05757120
D05415440

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03660
B03660
C03660
D03660

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A045820
B045820
C045820
D045820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A22452456412.512426%
B22452448342.152999%
C224524102744.575903%
D224524117775.245319%

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 261369 224467 0 0 0.00% 0.00%
B 261369 224479 0 0 0.00% 0.00%
C 261369 224499 0 0 0.00% 0.00%
D 261368 222953 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 12357 10.96 3395 3174 837.5
A 7 110 10643 8.92 3395 3174 837.5
A 0 30 9982 8.13 3395 3174 837.5
B 2 9 10349 11.11 3337 3181 645.2
B 2 8 8765 8.65 3337 3181 645.2
B 5 128 8356 8.02 3337 3181 645.2
C 12 241 8975 6.77 3355 3116 865.0
C 2 191 8674 6.43 3355 3116 865.0
C 9 233 8429 6.14 3355 3116 865.0
D 6 231 8112 6.28 3124 2834 840.7
D 3 14 8025 6.17 3124 2834 840.7
D 10 189 7731 5.83 3124 2834 840.7

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