ASTROSAT CZTI

Data Quality Report

Orbit 51485

Creation date: 2025-04-05T06:34:00.655145
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/AS1A13_090T01_9000006458_51485cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51485cztM0_level2_quad_clean.evt
Size (bytes)936,434,880101,113,920
Size893.1 MB 96.4 MB
Events in quadrant A10,944,101647,845
Events in quadrant B4,138,761824,181
Events in quadrant C4,670,761716,389
Events in quadrant D14,289,389315,865

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0381551
B0179331
C0196651
D0481111

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B020
C020
D020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01620
B01620
C01620
D01620

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8021172221.468645%
B80211792.231642%
C80213003.740182%
D8021448355.890787%

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 8046 8022 1248 1248 15.51% 15.56%
B 8046 8022 45 45 0.56% 0.56%
C 8046 8022 245 245 3.04% 3.05%
D 8045 8021 4203 4203 52.24% 52.40%

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 3016182 14832.17 820 799 203.3
A 12 250 1432179 7040.72 820 799 203.3
A 7 64 1204520 5920.9 820 799 203.3
B 7 252 127937 676.66 873 841 187.8
B 8 128 91134 480.72 873 841 187.8
B 12 32 76536 403.0 873 841 187.8
C 13 3 633067 2717.55 845 835 232.6
C 1 60 288700 1237.34 845 835 232.6
C 12 249 162632 695.46 845 835 232.6
D 8 176 9884609 60182.84 581 561 164.2
D 3 12 1210294 7365.93 581 561 164.2
D 11 176 298761 1815.71 581 561 164.2

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