ASTROSAT CZTI

Data Quality Report

Orbit 20200815_A09_127T01_9000003816_level2

Creation date: 2021-01-09T05:31:25.439059
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A09_127T01_9000003816cztM0_level2_bc.evt modeM0/AS1A09_127T01_9000003816cztM0_level2_quad_clean.evt
Size (bytes)2,372,103,360780,344,640
Size2.2 GB 744.2 MB
Events in quadrant A12,772,6245,074,297
Events in quadrant B16,247,9055,102,518
Events in quadrant C23,517,8044,741,444
Events in quadrant D15,447,0204,836,128

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011460
B011460
C011460
D011460

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01192940
B01349830
C01645650
D01288090

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01000
B01000
C01000
D01000

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A565875971.055013%
B5658719363.421281%
C5658746758.261615%
D5658710151.793698%

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 66372 56591 23 23 0.03% 0.04%
B 66372 56587 93 93 0.14% 0.16%
C 66372 56585 267 267 0.40% 0.47%
D 66372 56587 66 66 0.10% 0.12%

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 13 773749 1166.77 3092 3044 660.5
A 13 254 92950 136.11 3092 3044 660.5
A 6 16 31495 43.07 3092 3044 660.5
B 0 189 1821476 3115.06 3114 3046 583.8
B 5 172 1583678 2707.7 3114 3046 583.8
B 0 244 268117 454.08 3114 3046 583.8
C 3 233 8150361 11749.76 2921 2920 693.4
C 2 16 3310483 4769.97 2921 2920 693.4
C 4 254 690050 990.94 2921 2920 693.4
D 1 52 1939615 2758.59 3035 2959 702.0
D 12 233 1136394 1614.48 3035 2959 702.0
D 2 234 279351 393.69 3035 2959 702.0

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