ASTROSAT CZTI

Data Quality Report

Orbit 20180818_T02_086T01_9000002316_level2

Creation date: 2025-11-24T03:56:27.454372
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_086T01_9000002316cztM0_level2.fits modeM0/AS1T02_086T01_9000002316cztM0_level2_quad_clean.evt
Size (bytes)1,791,316,8001,838,361,600
Size1.7 GB 1.7 GB
Events in quadrant A10,947,30211,201,488
Events in quadrant B10,499,33011,192,297
Events in quadrant C10,776,17210,902,475
Events in quadrant D9,293,9289,650,645

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A037780
B037780
C037780
D037780

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02770
B02770
C02770
D02770

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03883810
B03927160
C03975250
D04758760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18586624271.305779%
B18586626541.427910%
C18586632411.743729%
D18586687194.691014%

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 213200 185823 0 0 0.00% 0.00%
B 213200 185836 0 0 0.00% 0.00%
C 213201 185833 0 0 0.00% 0.00%
D 213200 185706 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 10368 11.08 2851 2683 693.4
A 7 110 8706 8.69 2851 2683 693.4
A 9 19 8233 8.0 2851 2683 693.4
B 2 9 8325 10.6 2780 2662 534.5
B 2 8 7170 8.43 2780 2662 534.5
B 3 17 7012 8.14 2780 2662 534.5
C 12 241 7379 6.53 2849 2661 722.5
C 2 191 7184 6.26 2849 2661 722.5
C 3 126 7156 6.22 2849 2661 722.5
D 6 231 6715 6.17 2651 2414 697.0
D 3 14 6683 6.12 2651 2414 697.0
D 10 189 6481 5.84 2651 2414 697.0

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