ASTROSAT CZTI

Data Quality Report

Orbit 55179

Creation date: 2025-12-10T02:09:40.120624
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/AS1A14_022T16_9000006532_55179cztM0_level2.fits modeM0/AS1A14_022T16_9000006532_55179cztM0_level2_quad_clean.evt
Size (bytes)1,833,344,640343,880,640
Size1.7 GB 328.0 MB
Events in quadrant A21,474,4992,132,255
Events in quadrant B12,099,7482,453,808
Events in quadrant C15,070,7512,107,372
Events in quadrant D17,275,0931,988,738

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05080
B05080
C05080
D05080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0812674
B0553134
C0625844
D0696508

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A25137283311.270239%
B251387012.788607%
C2513812885.123717%
D2513516666.628208%

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 26582 25143 2147 2147 8.08% 8.54%
B 26583 25144 246 246 0.93% 0.98%
C 26583 25144 918 918 3.45% 3.65%
D 26582 25142 1193 1193 4.49% 4.75%

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 3 78 4887165 7771.91 2564 2503 628.5
A 3 45 4312595 6857.72 2564 2503 628.5
A 12 115 1340952 2129.58 2564 2503 628.5
B 2 249 742655 1313.36 2628 2520 563.5
B 5 185 435334 768.02 2628 2520 563.5
B 10 247 405700 715.44 2628 2520 563.5
C 10 22 2923464 4224.69 2542 2514 691.4
C 1 16 681758 982.42 2542 2514 691.4
C 14 254 376105 540.34 2542 2514 691.4
D 2 249 4486786 6247.65 2542 2430 717.8
D 11 129 1843212 2564.59 2542 2430 717.8
D 5 173 214692 295.72 2542 2430 717.8

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