ASTROSAT CZTI

Data Quality Report

Orbit 39876

Creation date: 2024-06-27T22:09:46.799763
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/AS1A12_032T03_9000005502_39876cztM0_level2.fits modeM0/AS1A12_032T03_9000005502_39876cztM0_level2_quad_clean.evt
Size (bytes)986,022,720253,258,560
Size940.3 MB 241.5 MB
Events in quadrant A9,344,5051,659,589
Events in quadrant B8,441,6131,740,138
Events in quadrant C7,790,3421,672,821
Events in quadrant D9,709,5191,514,881

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03180
B03180
C03180
D03180

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0600
B0600
C0600
D0600

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0376625
B0359514
C0328014
D0400124

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A156684873.108246%
B156681761.123309%
C15668470.299974%
D156684432.827419%

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 21520 15672 343 343 1.59% 2.19%
B 21520 15672 115 115 0.53% 0.73%
C 21520 15672 33 33 0.15% 0.21%
D 21520 15672 394 394 1.83% 2.51%

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 1269976 3681.48 1700 1666 344.5
A 14 250 1182973 3428.94 1700 1666 344.5
A 13 248 114412 327.26 1700 1666 344.5
B 0 183 495336 1503.31 1721 1675 328.4
B 4 170 178221 537.62 1721 1675 328.4
B 0 190 168707 508.65 1721 1675 328.4
C 15 214 648772 1634.17 1699 1715 396.0
C 14 254 167113 417.72 1699 1715 396.0
C 15 208 126396 314.89 1699 1715 396.0
D 1 47 648579 1577.31 1679 1634 410.2
D 12 233 378613 919.11 1679 1634 410.2
D 13 249 365103 886.17 1679 1634 410.2

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