ASTROSAT CZTI

Data Quality Report

Orbit 20210903_C06_002T04_9000004684_level2

Creation date: 2025-12-28T18:03:45.202853
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/AS1C06_002T04_9000004684cztM0_level2.fits modeM0/AS1C06_002T04_9000004684cztM0_level2_quad_clean.evt
Size (bytes)850,253,760768,458,880
Size810.9 MB 732.9 MB
Events in quadrant A5,616,6185,245,080
Events in quadrant B4,459,1983,133,591
Events in quadrant C5,247,6504,751,606
Events in quadrant D4,487,1024,220,235

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01530
B01520
C01530
D01530

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01805530
B04600560
C02029890
D02976420

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017580
B017600
C017620
D017700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A864648791.016608%
B861163355438.963723%
C8639238074.406658%
D86339998011.559087%

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 107004 86766 0 0 0.00% 0.00%
B 107004 86210 0 0 0.00% 0.00%
C 107004 86627 0 0 0.00% 0.00%
D 107003 86566 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 5473 11.45 1465 1382 357.4
A 7 110 4421 8.5 1465 1382 357.4
A 0 30 4332 8.25 1465 1382 357.4
B 2 9 3635 10.81 1182 1137 231.1
B 2 8 3113 8.55 1182 1137 231.1
B 3 80 2955 7.87 1182 1137 231.1
C 1 81 4102 8.12 1389 1310 343.8
C 1 80 4051 7.97 1389 1310 343.8
C 3 187 3607 6.68 1389 1310 343.8
D 10 189 3254 6.12 1283 1171 340.6
D 6 67 3179 5.9 1283 1171 340.6
D 7 3 3162 5.85 1283 1171 340.6

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