ASTROSAT CZTI

Data Quality Report

Orbit 51904

Creation date: 2025-05-03T11:21:55.386456
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_51904cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51904cztM0_level2_quad_clean.evt
Size (bytes)737,619,84077,633,280
Size703.4 MB 74.0 MB
Events in quadrant A7,537,075439,538
Events in quadrant B6,724,088524,583
Events in quadrant C4,972,096547,206
Events in quadrant D7,595,082409,019

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0268381
B0242581
C0191161
D0269751

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6153161226.198602%
B6153121119.681456%
C61542784.517387%
D6154147824.016900%

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 6873 6154 1203 1203 17.50% 19.55%
B 6873 6154 915 915 13.31% 14.87%
C 6874 6155 211 211 3.07% 3.43%
D 6874 6155 1299 1299 18.90% 21.10%

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 3276951 22846.75 563 548 143.4
A 12 3 648329 4517.05 563 548 143.4
A 4 175 612042 4264.02 563 548 143.4
B 5 172 2704950 21696.74 582 563 124.6
B 12 32 458222 3671.7 582 563 124.6
B 4 171 358788 2873.97 582 563 124.6
C 15 192 773527 4599.41 606 601 168.0
C 10 22 344709 2047.66 606 601 168.0
C 15 248 339756 2018.19 606 601 168.0
D 15 94 3011050 18399.05 527 508 163.6
D 8 176 912768 5575.31 527 508 163.6
D 6 42 447407 2731.24 527 508 163.6

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