ASTROSAT CZTI

Data Quality Report

Orbit 52894

Creation date: 2025-07-16T14:29:12.085881
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_011T08_9000006482_52894cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52894cztM0_level2_quad_clean.evt
Size (bytes)955,226,88090,423,360
Size911.0 MB 86.2 MB
Events in quadrant A12,946,200355,282
Events in quadrant B9,422,476616,638
Events in quadrant C5,102,289658,595
Events in quadrant D7,310,386585,979

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0435600
B0331500
C0203000
D0270060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7483397353.093679%
B7484170622.795297%
C74841902.538749%
D748489711.985569%

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 7482 7482 3699 3699 49.44% 49.44%
B 7484 7484 1554 1554 20.76% 20.76%
C 7484 7484 163 163 2.18% 2.18%
D 7484 7484 836 836 11.17% 11.17%

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 9 191 9930951 67769.89 580 566 146.5
A 15 174 128333 871.95 580 566 146.5
A 12 80 105799 718.16 580 566 146.5
B 10 254 4485020 28801.07 735 711 155.7
B 1 255 1492476 9581.06 735 711 155.7
B 4 81 82507 525.35 735 711 155.7
C 7 80 641523 3042.22 762 753 210.6
C 15 224 320288 1517.07 762 753 210.6
C 12 2 199358 942.93 762 753 210.6
D 8 176 2108246 9915.94 737 703 212.5
D 10 172 574631 2700.32 737 703 212.5
D 2 249 334582 1570.89 737 703 212.5

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