ASTROSAT CZTI

Data Quality Report

Orbit 20180613_A04_148T01_9000002162_level2

Creation date: 2025-11-22T21:40:19.306558
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_148T01_9000002162cztM0_level2.fits modeM0/AS1A04_148T01_9000002162cztM0_level2_quad_clean.evt
Size (bytes)144,743,040120,147,840
Size138.0 MB 114.6 MB
Events in quadrant A861,940638,950
Events in quadrant B880,516721,351
Events in quadrant C900,258690,426
Events in quadrant D789,276635,606

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02800
B02800
C02800
D02800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0370
B0370
C0370
D0370

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0423290
B0309920
C0369950
D0328350

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1377912429.013717%
B137792261.640177%
C137792061.495029%
D137794393.186008%

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 17459 13723 0 0 0.00% 0.00%
B 17459 13776 0 0 0.00% 0.00%
C 17459 13776 0 0 0.00% 0.00%
D 17459 13773 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 29 830 10.96 225 212 56.4
A 14 79 653 7.82 225 212 56.4
A 0 28 651 7.78 225 212 56.4
B 2 9 785 11.6 233 223 48.4
B 3 80 619 8.17 233 223 48.4
B 5 128 588 7.53 233 223 48.4
C 1 81 693 7.69 238 225 60.9
C 1 80 679 7.46 238 225 60.9
C 3 126 626 6.59 238 225 60.9
D 6 231 585 6.18 226 207 61.2
D 6 67 584 6.16 226 207 61.2
D 10 189 575 6.01 226 207 61.2

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