ASTROSAT CZTI

Data Quality Report

Orbit 20160829_T01_135T01_9000000632_level2

Creation date: 2025-11-05T01:38:03.669510
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/AS1T01_135T01_9000000632cztM0_level2.fits modeM0/AS1T01_135T01_9000000632cztM0_level2_quad_clean.evt
Size (bytes)141,595,200126,573,120
Size135.0 MB 120.7 MB
Events in quadrant A863,826754,667
Events in quadrant B827,896749,385
Events in quadrant C842,356706,590
Events in quadrant D703,376571,775

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0320570
B0329030
C0320950
D0420280

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03080
B03080
C03080
D03080

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A152174122.707498%
B152134933.240649%
C152173442.260630%
D1521814049.225917%

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 16592 15214 0 0 0.00% 0.00%
B 16592 15210 0 0 0.00% 0.00%
C 16592 15215 0 0 0.00% 0.00%
D 16592 15203 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 14 188 879 11.32 223 209 59.2
A 0 29 847 10.78 223 209 59.2
A 7 110 756 9.24 223 209 59.2
B 2 9 756 11.46 218 206 48.0
B 14 254 627 8.77 218 206 48.0
B 12 226 593 8.06 218 206 48.0
C 12 241 627 6.92 221 204 61.1
C 1 80 601 6.5 221 204 61.1
C 9 188 594 6.38 221 204 61.1
D 3 31 586 7.28 200 181 55.6
D 11 82 535 6.36 200 181 55.6
D 1 19 514 5.99 200 181 55.6

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