ASTROSAT CZTI

Data Quality Report

Orbit 20180808_T02_082T01_9000002286_level2

Creation date: 2025-11-23T23:34:42.689920
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_082T01_9000002286cztM0_level2.fits modeM0/AS1T02_082T01_9000002286cztM0_level2_quad_clean.evt
Size (bytes)408,939,840415,336,320
Size390.0 MB 396.1 MB
Events in quadrant A2,462,0202,483,755
Events in quadrant B2,370,8002,465,107
Events in quadrant C2,421,4302,414,619
Events in quadrant D2,112,0542,196,856

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0973470
B0995720
C0941440
D01026070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08920
B08920
C08920
D08920

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0520
B0520
C0520
D0520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A439749012.048938%
B4397410352.353664%
C439745751.307591%
D439748531.939783%

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 48979 43969 0 0 0.00% 0.00%
B 48979 43970 0 0 0.00% 0.00%
C 48979 43972 0 0 0.00% 0.00%
D 48979 43971 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 2378 11.04 641 599 161.1
A 7 110 2000 8.7 641 599 161.1
A 9 19 1945 8.36 641 599 161.1
B 2 9 1891 10.43 627 598 123.9
B 3 80 1668 8.63 627 598 123.9
B 14 254 1661 8.58 627 598 123.9
C 12 241 1716 6.81 640 596 164.4
C 3 126 1667 6.51 640 596 164.4
C 3 158 1614 6.19 640 596 164.4
D 3 14 1594 6.41 603 547 163.5
D 6 231 1523 5.97 603 547 163.5
D 10 189 1482 5.72 603 547 163.5

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