ASTROSAT CZTI

Data Quality Report

Orbit 31275

Creation date: 2024-06-27T20:26:01.785841
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_024T01_9000004530_31275cztM0_level2.evt modeM0/AS1T04_024T01_9000004530_31275cztM0_level2_quad_clean.evt
Size (bytes)281,983,68049,875,840
Size268.9 MB 47.6 MB
Events in quadrant A1,698,201325,959
Events in quadrant B2,695,781321,387
Events in quadrant C1,840,627309,168
Events in quadrant D2,070,304309,599

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070971
B0106361
C075141
D084352

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0700
B0700
C0700
D0700

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3444300.871080%
B34441053.048780%
C3444832.409988%
D3443401.161778%

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 4354 3445 0 0 0.00% 0.00%
B 4354 3445 16 16 0.37% 0.46%
C 4354 3445 9 9 0.21% 0.26%
D 4353 3444 11 11 0.25% 0.32%

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 13 254 6706 69.36 439 429 90.5
A 3 137 4630 46.42 439 429 90.5
A 0 226 3688 36.01 439 429 90.5
B 6 159 864039 10254.46 430 418 84.2
B 0 230 64165 756.92 430 418 84.2
B 4 80 39651 465.84 430 418 84.2
C 14 238 69804 692.49 419 421 100.2
C 3 233 60768 602.3 419 421 100.2
C 0 10 59280 587.45 419 421 100.2
D 8 195 306415 2740.32 422 412 111.7
D 12 233 75932 676.3 422 412 111.7
D 2 250 48329 429.11 422 412 111.7

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