ASTROSAT CZTI

Data Quality Report

Orbit 51977

Creation date: 2025-05-08T10:16:41.034290
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_011T06_9000006468_51977cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51977cztM0_level2_quad_clean.evt
Size (bytes)794,056,32093,922,560
Size757.3 MB 89.6 MB
Events in quadrant A5,028,494639,352
Events in quadrant B4,620,569710,778
Events in quadrant C10,269,373482,413
Events in quadrant D8,909,348502,116

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200711
B0191481
C0356648
D0315871

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A73095006.840881%
B73093314.528663%
C7308232431.800766%
D7309154721.165686%

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 7914 7311 378 378 4.78% 5.17%
B 7914 7311 202 202 2.55% 2.76%
C 7913 7310 2032 2032 25.68% 27.80%
D 7913 7309 1367 1367 17.28% 18.70%

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 7 64 1592655 8665.06 727 708 183.7
A 5 240 109408 591.66 727 708 183.7
A 4 3 89772 484.78 727 708 183.7
B 8 128 384763 2492.52 737 712 154.1
B 10 44 275244 1781.74 737 712 154.1
B 4 81 128874 831.78 737 712 154.1
C 15 224 4719000 27836.69 610 605 169.5
C 12 252 2376257 14015.42 610 605 169.5
C 13 3 259568 1527.78 610 605 169.5
D 2 172 4065371 22030.04 652 625 184.5
D 6 42 728427 3944.53 652 625 184.5
D 8 176 387216 2095.24 652 625 184.5

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