ASTROSAT CZTI

Data Quality Report

Orbit 20171029_A04_144T01_9000001652_level2

Creation date: 2025-11-18T02:21:56.103959
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/AS1A04_144T01_9000001652cztM0_level2.fits modeM0/AS1A04_144T01_9000001652cztM0_level2_quad_clean.evt
Size (bytes)1,379,623,6801,411,914,240
Size1.3 GB 1.3 GB
Events in quadrant A8,103,7938,364,868
Events in quadrant B8,033,3688,733,412
Events in quadrant C8,507,5748,434,235
Events in quadrant D6,812,8926,921,388

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030640
B030680
C030640
D030620

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04381940
B03947550
C03112920
D04899470

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02200
B02200
C02200
D02200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A150369128888.570916%
B150442105537.014663%
C15048914660.974158%
D1503161693411.265600%

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 173249 150674 0 0 0.00% 0.00%
B 173249 150787 0 0 0.00% 0.00%
C 173249 150828 0 0 0.00% 0.00%
D 173249 149560 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 14 188 8371 12.04 2105 1964 532.3
A 0 29 7790 10.94 2105 1964 532.3
A 14 204 6889 9.25 2105 1964 532.3
B 2 9 6931 11.95 2114 2012 411.5
B 3 17 5328 8.06 2114 2012 411.5
B 5 128 5326 8.05 2114 2012 411.5
C 1 80 6534 7.58 2247 2086 586.9
C 1 81 6348 7.26 2247 2086 586.9
C 12 241 5925 6.54 2247 2086 586.9
D 3 14 5175 6.55 1944 1766 520.2
D 6 231 4945 6.11 1944 1766 520.2
D 7 5 4816 5.86 1944 1766 520.2

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