ASTROSAT CZTI

Data Quality Report

Orbit 51861

Creation date: 2025-04-30T14:11:53.068737
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_51861cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51861cztM0_level2_quad_clean.evt
Size (bytes)656,884,80082,405,440
Size626.5 MB 78.6 MB
Events in quadrant A6,330,600563,296
Events in quadrant B3,404,462629,254
Events in quadrant C3,327,387565,781
Events in quadrant D10,762,448294,832

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0232031
B0146311
C0145821
D0363593

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63303455.450237%
B63311502.369294%
C6331851.342600%
D6330310949.115324%

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 6902 6333 220 220 3.19% 3.47%
B 6903 6334 63 63 0.91% 0.99%
C 6903 6334 70 70 1.01% 1.11%
D 6903 6334 2924 2924 42.36% 46.16%

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 2222303 13638.62 643 628 162.9
A 11 3 383838 2352.48 643 628 162.9
A 12 194 260733 1596.76 643 628 162.9
B 5 185 178634 1288.85 647 625 138.1
B 0 171 141190 1017.74 647 625 138.1
B 4 81 100449 722.76 647 625 138.1
C 13 3 385452 2205.4 630 623 174.5
C 12 252 75178 427.26 630 623 174.5
C 15 230 63542 360.58 630 623 174.5
D 11 129 6713083 53262.88 448 431 126.0
D 8 176 1668915 13238.92 448 431 126.0
D 0 18 146690 1160.52 448 431 126.0

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