ASTROSAT CZTI

Data Quality Report

Orbit 51964

Creation date: 2025-05-07T13:17:34.201051
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_51964cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51964cztM0_level2_quad_clean.evt
Size (bytes)1,041,670,08079,200,000
Size993.4 MB 75.5 MB
Events in quadrant A6,813,574593,790
Events in quadrant B5,322,722663,069
Events in quadrant C11,837,617362,537
Events in quadrant D14,046,391290,785

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250490
B0206700
C0399930
D0465290

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A699273510.512014%
B69924436.335812%
C6992337648.283753%
D6993389555.698556%

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 6992 6992 704 704 10.07% 10.07%
B 6992 6992 287 287 4.10% 4.10%
C 6992 6992 2530 2530 36.18% 36.18%
D 6993 6993 3845 3845 54.98% 54.98%

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 4 95 1958848 11535.83 689 673 169.7
A 7 64 1261255 7426.23 689 673 169.7
A 4 159 284594 1672.61 689 673 169.7
B 5 185 1473515 10006.37 697 674 147.2
B 10 254 220135 1491.0 697 674 147.2
B 0 216 146334 989.6 697 674 147.2
C 15 224 7936398 52754.3 539 533 150.4
C 0 193 898410 5968.71 539 533 150.4
C 4 5 435397 2890.79 539 533 150.4
D 6 42 8802106 57728.98 541 517 152.5
D 12 17 1018409 6676.28 541 517 152.5
D 10 181 704924 4620.15 541 517 152.5

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