ASTROSAT CZTI

Data Quality Report

Orbit 20210423_A10_097T01_9000004334_level2

Creation date: 2025-12-25T00:33:57.685182
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/AS1A10_097T01_9000004334cztM0_level2.fits modeM0/AS1A10_097T01_9000004334cztM0_level2_quad_clean.evt
Size (bytes)952,012,800930,386,880
Size907.9 MB 887.3 MB
Events in quadrant A5,935,5185,831,856
Events in quadrant B5,545,8545,746,176
Events in quadrant C5,452,5944,719,596
Events in quadrant D5,145,6585,133,368

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020020
B020020
C020020
D020020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02094910
B02987590
C03468900
D02263490

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9841016821.709176%
B9841022222.257901%
C984101535415.602073%
D9841012701.290519%

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 112820 98404 0 0 0.00% 0.00%
B 112820 98405 0 0 0.00% 0.00%
C 112819 98397 0 0 0.00% 0.00%
D 112820 98408 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 5032 9.55 1543 1447 375.6
A 7 110 4661 8.56 1543 1447 375.6
A 0 30 4363 7.76 1543 1447 375.6
B 2 9 4640 11.44 1465 1403 282.9
B 5 255 3772 8.37 1465 1403 282.9
B 2 8 3746 8.28 1465 1403 282.9
C 12 241 3916 7.14 1441 1353 358.9
C 3 187 3794 6.8 1441 1353 358.9
C 9 209 3695 6.53 1441 1353 358.9
D 15 46 3951 6.74 1468 1338 387.7
D 10 189 3654 5.97 1468 1338 387.7
D 3 14 3596 5.82 1468 1338 387.7

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