ASTROSAT CZTI

Data Quality Report

Orbit 20180529_G08_025T01_9000002130_level2

Creation date: 2025-11-22T16:09:04.733540
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/AS1G08_025T01_9000002130cztM0_level2.fits modeM0/AS1G08_025T01_9000002130cztM0_level2_quad_clean.evt
Size (bytes)2,261,050,5602,275,456,320
Size2.1 GB 2.1 GB
Events in quadrant A13,843,45114,100,586
Events in quadrant B13,122,63013,457,952
Events in quadrant C13,587,11813,000,952
Events in quadrant D11,652,83012,094,790

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05062800
B05667050
C05592450
D06194390

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A048340
B048300
C048340
D048340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03660
B03660
C03660
D03660

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A23741734881.469145%
B23741994883.996310%
C23742640121.689790%
D237397119355.027443%

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 274518 237437 0 0 0.00% 0.00%
B 274518 237160 0 0 0.00% 0.00%
C 274518 237457 0 0 0.00% 0.00%
D 274518 237078 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 13538 11.37 3608 3380 893.2
A 7 110 11294 8.86 3608 3380 893.2
A 9 19 10507 7.98 3608 3380 893.2
B 2 9 11583 12.41 3464 3307 666.9
B 3 17 8837 8.29 3464 3307 666.9
B 3 80 8638 7.99 3464 3307 666.9
C 1 81 10153 7.39 3587 3329 922.9
C 1 80 10139 7.38 3587 3329 922.9
C 12 241 9687 6.89 3587 3329 922.9
D 3 14 8690 6.32 3329 3024 896.2
D 6 231 8485 6.09 3329 3024 896.2
D 7 3 8254 5.83 3329 3024 896.2

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