ASTROSAT CZTI

Data Quality Report

Orbit 36762

Creation date: 2024-06-27T21:31:19.185740
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_101T01_9000005238_36762cztM0_level2.evt modeM0/AS1A11_101T01_9000005238_36762cztM0_level2_quad_clean.evt
Size (bytes)814,867,20059,996,160
Size777.1 MB 57.2 MB
Events in quadrant A2,850,304469,215
Events in quadrant B13,917,21892,937
Events in quadrant C2,891,518464,128
Events in quadrant D4,635,403391,024

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0121593
B0453242
C0120652
D0175742

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5683210.369523%
B5683518591.237023%
C5683270.475101%
D568371012.493401%

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 7235 5684 4 4 0.06% 0.07%
B 7234 5682 4992 4992 69.01% 87.86%
C 7235 5684 13 13 0.18% 0.23%
D 7235 5684 685 685 9.47% 12.05%

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 10 83 241783 1816.0 654 641 132.8
A 7 3 21203 154.85 654 641 132.8
A 0 247 15603 112.68 654 641 132.8
B 12 1 13072701 400907.92 164 160 32.6
B 4 171 44484 1359.33 164 160 32.6
B 0 213 39352 1201.94 164 160 32.6
C 15 214 242917 1620.94 638 641 149.5
C 0 10 54141 357.94 638 641 149.5
C 14 254 46634 307.71 638 641 149.5
D 12 6 1925596 13084.44 591 573 147.1
D 13 171 191984 1301.03 591 573 147.1
D 2 153 56533 380.36 591 573 147.1

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