ASTROSAT CZTI

Data Quality Report

Orbit 01826

Creation date: 2024-06-27T14:12:55.761337
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/AS1G02_021T08_9000000302_01826cztM0_level2.evt modeM0/AS1G02_021T08_9000000302_01826cztM0_level2_quad_clean.evt
Size (bytes)1,098,771,84074,675,520
Size1.0 GB 71.2 MB
Events in quadrant A8,212,236450,209
Events in quadrant B8,404,865458,801
Events in quadrant C7,976,626448,129
Events in quadrant D8,234,599432,680

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B110
C1-1-1
D1-1-1

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0291922
B0298072
C0284702
D0293142

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01361
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6763781.153334%
B6763630.931539%
C6763570.842821%
D67632323.430430%

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 7518 6765 300 300 3.99% 4.43%
B 7518 6765 278 278 3.70% 4.11%
C 7518 6764 239 239 3.18% 3.53%
D 7518 6764 515 515 6.85% 7.61%

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 15 236 27819 49.57 2139 2157 517.7
A 10 2 6835 9.04 2139 2157 517.7
A 0 5 4879 5.26 2139 2157 517.7
B 0 234 24433 42.49 2207 2223 522.7
B 0 229 10102 15.07 2207 2223 522.7
B 0 220 9616 14.14 2207 2223 522.7
C 15 246 120637 210.23 2009 2078 563.9
C 12 4 12455 18.4 2009 2078 563.9
C 7 159 6920 8.59 2009 2078 563.9
D 7 85 342607 562.74 1954 2025 605.2
D 7 34 136109 221.55 1954 2025 605.2
D 13 105 125766 204.46 1954 2025 605.2

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