ASTROSAT CZTI

Data Quality Report

Orbit 20211025_A11_088T01_9000004738_level2

Creation date: 2021-10-26T15:58:11.115984
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/AS1A11_088T01_9000004738cztM0_level2_bc.evt modeM0/AS1A11_088T01_9000004738cztM0_level2_quad_clean.evt
Size (bytes)401,768,64084,395,520
Size383.2 MB 80.5 MB
Events in quadrant A1,401,919549,167
Events in quadrant B1,962,733555,244
Events in quadrant C1,767,268558,292
Events in quadrant D6,598,628452,038

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0131740
B0158880
C0141450
D0340280

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6305440.697859%
B63053165.011895%
C63051372.172879%
D6305239638.001586%

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 7618 6305 15 15 0.20% 0.24%
B 7618 6305 4 4 0.05% 0.06%
C 7618 6305 63 63 0.83% 1.00%
D 7618 6302 585 585 7.68% 9.28%

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 9 143 133263 1824.45 314 309 72.9
A 0 135 23675 320.64 314 309 72.9
A 13 254 11607 155.04 314 309 72.9
B 5 172 451690 6855.77 311 304 65.8
B 0 219 68547 1036.49 311 304 65.8
B 0 197 65736 993.8 311 304 65.8
C 3 233 373522 5036.23 309 305 74.1
C 0 10 102325 1376.67 309 305 74.1
C 1 241 36623 490.08 309 305 74.1
D 12 227 1677044 25129.99 248 242 66.7
D 8 195 1376544 20626.44 248 242 66.7
D 2 249 654682 9808.0 248 242 66.7

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