ASTROSAT CZTI

Data Quality Report

Orbit 51842

Creation date: 2025-04-29T06:36:17.384713
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/AS1C09_011T05_9000006466_51842cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51842cztM0_level2_quad_clean.evt
Size (bytes)689,924,16085,383,360
Size658.0 MB 81.4 MB
Events in quadrant A4,555,368602,609
Events in quadrant B4,663,456648,577
Events in quadrant C4,837,850563,313
Events in quadrant D10,988,457325,640

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180472
B0183722
C0188252
D0370936

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0210
C0210
D0210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63731652.589048%
B63733245.083948%
C63735218.175114%
D6372301447.300691%

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 7473 6374 112 112 1.50% 1.76%
B 7473 6374 164 164 2.19% 2.57%
C 7473 6373 385 385 5.15% 6.04%
D 7472 6372 2626 2626 35.14% 41.21%

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 12 3 872398 5305.31 662 646 164.3
A 15 174 365808 2222.3 662 646 164.3
A 11 3 185137 1122.78 662 646 164.3
B 5 185 443649 3164.39 659 638 140.0
B 5 32 414656 2957.29 659 638 140.0
B 8 128 282616 2014.14 659 638 140.0
C 15 218 973064 5523.07 637 633 176.1
C 15 219 254266 1440.55 637 633 176.1
C 15 248 210885 1194.16 637 633 176.1
D 11 129 5921598 42706.14 491 474 138.6
D 3 12 967116 6971.91 491 474 138.6
D 12 6 832124 5998.28 491 474 138.6

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