ASTROSAT CZTI

Data Quality Report

Orbit 20180528_A04_186T01_9000002126_level2

Creation date: 2025-11-22T15:16:43.127986
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_186T01_9000002126cztM0_level2.fits modeM0/AS1A04_186T01_9000002126cztM0_level2_quad_clean.evt
Size (bytes)289,206,720302,780,160
Size275.8 MB 288.8 MB
Events in quadrant A1,767,4761,911,452
Events in quadrant B1,691,0721,808,172
Events in quadrant C1,713,8881,740,467
Events in quadrant D1,465,7281,589,773

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0550
B0550
C0550
D0550

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0645020
B0684070
C0800850
D0922920

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06260
B06260
C06260
D06260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A308522180.706599%
B308525051.636847%
C308523391.098794%
D3085224687.999481%

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 36192 30847 0 0 0.00% 0.00%
B 36192 30844 0 0 0.00% 0.00%
C 36192 30849 0 0 0.00% 0.00%
D 36192 30830 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 1680 10.57 460 431 118.1
A 7 110 1454 8.66 460 431 118.1
A 15 236 1364 7.89 460 431 118.1
B 2 9 1498 11.93 447 426 89.9
B 3 80 1173 8.31 447 426 89.9
B 3 17 1117 7.69 447 426 89.9
C 12 241 1256 7.06 453 422 118.2
C 9 233 1202 6.6 453 422 118.2
C 2 191 1189 6.49 453 422 118.2
D 3 14 1127 6.48 418 379 115.5
D 1 31 1051 5.82 418 379 115.5
D 6 231 1045 5.77 418 379 115.5

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