ASTROSAT CZTI

Data Quality Report

Orbit 35482

Creation date: 2022-04-21T13:11:19.054696
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/AS1T04_095T01_9000005080_35482cztM0_level2.evt modeM0/AS1T04_095T01_9000005080_35482cztM0_level2_quad_clean.evt
Size (bytes)590,382,72091,745,280
Size563.0 MB 87.5 MB
Events in quadrant A4,547,532583,572
Events in quadrant B3,366,449641,109
Events in quadrant C5,318,318604,364
Events in quadrant D4,295,184583,641

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0169793
B0134192
C0193522
D0161622

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5201102219.650067%
B52012304.422226%
C520152310.055759%
D520153410.267256%

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 7052 5202 808 808 11.46% 15.53%
B 7052 5202 146 146 2.07% 2.81%
C 7052 5202 432 432 6.13% 8.30%
D 7052 5202 449 449 6.37% 8.63%

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 15 169 2276792 20606.91 550 539 110.5
A 10 83 130895 1180.11 550 539 110.5
A 13 6 8107 68.51 550 539 110.5
B 5 236 651883 5837.41 587 572 111.6
B 5 172 200314 1790.2 587 572 111.6
B 4 81 88613 789.07 587 572 111.6
C 4 254 2418865 18444.84 566 569 131.1
C 0 10 281686 2144.14 566 569 131.1
C 15 214 211770 1610.87 566 569 131.1
D 10 118 1189550 8743.21 564 549 136.0
D 7 80 367460 2698.05 564 549 136.0
D 8 195 109347 800.04 564 549 136.0

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